path: root/release/doc/fr_FR.ISO8859-1/hardware/alpha/proc-alpha.xml

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<sect1>
  <sect1info>
    <authorgroup>
      <author>
	<firstname>Wilko</firstname>
	<surname>Bulte</surname>
	<contrib>Maintenu par </contrib>
      </author>
    </authorgroup>
  </sect1info>

  <title>Processeurs et cartes m&egrave;res support&eacute;es</title>

  <para>Des retours, mises &agrave; jour et corrections a
  cette liste sont encourag&eacute;s.</para>

  <sect2>
    <title>Aper&ccedil;u</title>

    <para>Ce document se veut &ecirc;tre un point de d&eacute;part pour tous
    ceux qui d&eacute;sirent faire fonctionner &os; sur des machine &agrave;
    base de processeurs Alpha. Ce guide fournit des informations sur
    les diff&eacute;rentes architectures mat&eacute;rielles. Il ne se veut pas
    un rempla&ccedil;ant aux pages de manuel du syst&egrave;me.</para>

    <para>L'information est structur&eacute; de la mani&egrave;re
    suivante:</para>
      <itemizedlist>
        <listitem>
	  <para>G&eacute;n&eacute;ralit&eacute; sur le mat&eacute;riel
          Alpha pour fonctionner avec &os;;</para>
	</listitem>
        <listitem>
          <para>Information sp&eacute;cifique au syst&egrave;me pour chacune
          des cartes m&egrave;res support&eacute;es par &os;;</para>
        </listitem>
	<listitem>
	  <para>Informations sur les cartes d'extension sous &os;,
          incluant les diff&eacute;rences entre ces cartes et la liste de
          mat&eacute;riel g&eacute;n&eacute;rique support&eacute;e.</para>
	</listitem>
      </itemizedlist>

    <note>
      <para>Vous trouverez des r&eacute;f&eacute;rences &agrave; DEC, Digital
      Equipment Corporation et Compaq, utilis&eacute; de fa&ccedil;on
      interchangeable dans ce document. Compaq ayant rachet&eacute;
      Digital Equipment, il serait plus correcte de se
      r&eacute;f&eacute;r&eacute; &agrave; Compaq uniquement. Je vous
      prie d'accepter mes excuses sur la mixit&eacute; de ces noms
      trouv&eacute;es dans ce document.</para>
    </note>

    <note>
      <para>Les commandes SRM seront indiqu&eacute;es en
      <userinput>MAJUSCULE</userinput>. L'utilisation des minuscules
      en entr&eacute;e est accept&eacute;e par SRM. Les majuscules sont
      utilis&eacute;es par soucis de clart&eacute;.</para>
    </note>

    <note>
      <para>Compaq a mis en ligne des informations pour les
      d&eacute;veloppeurs Linux, qui sont tr&egrave;s utiles aussi pour les
      utilisateurs de &os;. Voyez la page des <ulink
      url="http://www.support.compaq.com/alpha-tools/">Utilitaires
      Linux pour Alpha</ulink>.</para>

    </note>
     
  </sect2>

  <sect2>
    <title>De quoi avez vous besoin pour faire fonctionner &os; sur
    une plateforme Alpha?</title>

    <para>Bien sur, vous devez disposer d'une machine Alpha reconnue
    par &os;. Les machines Alpha ne sont PAS comme des PCs. Il existe
    un nombre consid&eacute;rable de diff&eacute;rences entre les
    diff&eacute;rents composants de base et les architectures de cartes
    m&egrave;res. Cela veut dire que le noyau doit connaîtres les
    d&eacute;tails les plus fins de la machine sur laquelle il doit
    fonctionner. Cela veut dire que un noyau
    <filename>GENERIC</filename> risque, la plupart du temps de ne pas
    fonctionner.</para>

    <para>Pour une machine sur laquelle vous d&eacute;sirez faire
    fonctionner &os;, assurez vous que le microcode de la console SRM
    est install&eacute;. Ou assurez vous que le microcode de console SRM
    est disponible pour ce type de machine. Si &os; ne supporte pas
    encore votre type de machine, il y a beaucoup de chance pour que
    cela change dans l'avenir, si le SRM est disponible. Toutes ces
    assomptions sont fausses si le microcode de console SRM n'est pas
    disponible.</para>

    <para>Les machines disposant d'un microcode de console ARC ou
    AlphaBIOS ont &eacute;t&eacute; pr&eacute;vues pour fonctionner avec
    WindowsNT. Certaines disposent d'un microcode de console SRM dans
    la ROM syst&egrave;me, il suffit de le selectionner (via le menu ARC
    ou AlphaBIOS correspondant). Dans tous les autres cas vous devrez
    r&eacute;-inscrire le code SRM dans les ROMs. V&eacute;rifiez sur 
    <ulink url="http://ftp.digital.com/pub/DEC/Alpha/firmware"> le site des
    microcode Alpha</ulink> pour v&eacute;rifier si il est disponible pour
    votre syst&egrave;me. Dans tous les cas: <quote>no SRM</quote> veut
    dir qu'il n'existe pas pour &os; (ou NetBSD, OpenBSD, Tru64 Unix
    ou OpenVMS). Avec la d&eacute;convenue de WindowNT/alpha, un grand
    nombre de machines NT de seconde main sont vendues. Elles ont
    tr&egrave;s peu ou aucune valeur de revente si elles ne disposent que
    du microcode de console NT. Soyez donc attentif si le prix parait
    trop bon.</para>

    <para>Les machines non-SRM connues sont:</para>
      <itemizedlist>
        <listitem>
	  <para>les s&eacute;ries Digital XL</para>
	</listitem>
	<listitem>
	  <para>les s&eacute;ries Digital XLT</para>
	</listitem>
	<listitem>
	  <para>Samsung PC164UX (<quote>Ruffian</quote>)</para>
	</listitem>
	<listitem>
	  <para>Samsung 164B</para>
	</listitem>
      </itemizedlist>

    <para>Les machines disposant de code SRM, mais non support&eacute;es
    par &os; sont: </para>
       <itemizedlist>
	 <listitem>
           <para>DECpc 150 (<quote>Jensen</quote>)</para>
         </listitem>
	 <listitem>
           <para>DEC 2000/300 (<quote>Jensen</quote>)</para>
         </listitem>
	 <listitem>
           <para>DEC 2000/500 (<quote>Culzean</quote>)</para>
         </listitem>
	 <listitem>
           <para>AXPvme series (<quote>Medulla</quote>)</para>
         </listitem>
       </itemizedlist>
    
    <para>Pour compliquer le tout: Digital a appel&eacute;
    <quote>white-box</quote>, des machines Alpha destin&eacute;es
    uniquement &agrave; WindowsNT et <quote>blue-box</quote> des machines
    Alpha destin&eacute;es uniquement &agrave; OpenVMS et Digital Unix. Ces
    noms correspondent &agrave; la couleur du coffret, respectivement
    <quote>FrostWhite</quote> et <quote>TopGunBlue</quote>. M&ecirc;me si
    vous r&eacute;ussisez &agrave; mettre un microcode de console SRM sur une
    <quote>whitebox</quote>, OpenVMS et Digital Unix refuserons de
    d&eacute;marrer. &os; dans la version post 4.0-RELEASE fonctionnera
    sur ces variantes. Avant tout; les machines <quote>white</quote>
    sont diff&eacute;rentes des autres (lisez: moins cher) machines
    Digital.</para>

    <para>Vous obtiendrez le code PAL OSF/1 (OSF/1 est le nom initial
    de Digital Unix sur les plateformes Alpha) comme partie du code
    SRM. Le code PAL peut &ecirc;tre vu comme une couche d'abstraction
    logicielle entre le mat&eacute;riel et le syst&egrave;me
    d'exploitation. Il utilise des instructions processeurs standards
    et r&eacute;serv&eacute;es &agrave; PAL. PAL n'est pas un microcode. Le
    micro-noyau de console ARC contient une version diff&eacute;rente du
    code PAL, d&eacute;velopp&eacute; pour WindowsNT et qui n'est pas
    utilisable par &os; (de fa&ccedil;on plus g&eacute;n&eacute;rale: Unix ou
    OpenVMS). Linux/alpha fournit une version sp&eacute;cifique du code
    PAL, permettant de fonctionner sur les machines ARC et
    AlphaBIOS. Il y a plusieurs raisons pour lesquelles cela n'est pas
    une bonne id&eacute;es pour les d&eacute;veloppeurs des *BSD. Nous ne
    rentrerons pas dans les d&eacute;tails ici. Si vous etes
    intere&eacute;ss&eacute; par les d&eacute;tails, cherchez les sur
    les site web de &os; et NetBSD.</para>

    <para>Un autre d&eacute;tail est important: vous devez disposer d'un
    adaptateur de disque reconnu par le code de console SRM, si vous
    voulez d&eacute;marrer depuis un disque. Pour les machines anciennes
    bas&eacute;es sur du PCI, cela veut dire que vous devez disposer d'une
    adaptateur bas&eacute; sur un NCR/Symbios 53C810 ou Qlogic
    1020/1040. Certaines machines disposent d'un composant SCSI sur la
    carte m&egrave;re. Les machines et version de SRM plus r&eacute;centes
    sont capables de fonctionner avec des composants/adaptateurs SCSI
    plus modernes. V&eacute;rifiez les informations sp&eacute;cifiques
    &agrave; la machine utilis&eacute; ci-dessous. Notez que la suite
    de ce document ref&egrave;re aux machines disposant d'un composant
    Symbios, cela correspond aussi aux plus vieux composants
    not&eacute; NCR. Symbios ayant rachet&eacute; Symbios.</para>

    <para>Les principaux probl&egrave;mes se posent pour les personnes
    ayant des machines qui ont commenc&eacute; leur vie avec
    WindowsNT. ARC et AlphaBIOS d&eacute;tectent
    <emphasis>d'autres</emphasis> adaptateurs que ceux sur lesquels
    SRM est capable de d&eacute;marrer. Par exemple, vous pouvez
    d&eacute;marr&eacute; sur une carte Adaptec 2940UW avec ARC/AlphaBios,
    mais (g&eacute;n&eacute;rallement) pas avec SRM. Certaines nouvelles
    machines ont introduit le support Adaptec pour le
    d&eacute;marrage. Consultez la section sp&eacute;cifique de votre machine
    pour plus de d&eacute;tails.</para>

    <para>La plupart des adaptateurs qui ne permettent pas de
    d&eacute;marrer fonctionnent parfaitement pour une utilisation en
    disque de donn&eacute;es. Les diff&eacute;rences entre SRM et ARC peuvent
    &eacute;galement apparaitre dans les syst&egrave;mes (principalement
    Windows NT) disposant de disques dur et de CDROM IDE
    int&eacute;gr&eacute;s. Des versions de SRM permettant de
    d&eacute;marrer sur des disques IDE ou des CDROM existent (cela
    d&eacute;pend du type de machine). Consultez la section
    sp&eacute;cifique &agrave; votre machine pour plus de
    d&eacute;tails.</para>

    <para>&os; 4.0 et sup&eacute;rieur peut &ecirc;tre d&eacute;marrer
    depuis le CDROM de distribution. Les version
    pr&eacute;c&eacute;dentes doivent d&eacute;marrer depuis une
    version 2 disquettes.</para>

    <para>Dans le but d'&ecirc;tre d&eacute;marrable, la partition root
    (partition a) doit se situer au d&eacute;but du disque (offset
    0). Cela veut dire que vous devez utiliser l'installeur dans le
    menu partition et assigner la partition <quote>a</quote> avec un
    offset de 0 &agrave; la partition de base. La suite du partitionnement
    peut se faire comme vous le d&eacute;sirer. Si vous ne respecter pas
    cette r&egrave;gle, le reste de l'installation de passera bien, mais
    le syst&egrave;me refusera de d&eacute;marrer sur ce disque.</para>

    <para>Si vous ne disposez pas de disque local, vous pouvez
    d&eacute;marrer via le r&eacute;seau Ethernet. Cela n&eacute;cessite un
    adaptateur Ethernet reconnu par la console SRM. G&eacute;n&eacute;ralement
    G&eacute;n&eacute;rallement il vous faut dispose d'une interface
    bas&eacute; sur une interface 21040 ou 21142 ou 21143. Les
    anciennes machines ou version de SRM ne reconnaissent pas les
    composants 21142/21143 Fast Ethernet, vous etes donc
    limit&eacute;s &agrave; 10Mb pour un d&eacute;marrage par le
    r&eacute;seau de ces machines. Les cartes non fabriqu&eacute;es
    par DEC bas&eacute;es sur ces composants vont
    g&eacute;n&eacute;rallement(mais cela n'est pas garanti)
    fonctionner correctement. Notez que Intel &agrave; continu&eacute;
    les puces 21x4x lorsqu'ils ont rachet&eacute; Digital
    Semiconductor. Vous risquez donc de voir un logo Intel sur elle un
    de ces jours. Les machines r&eacute;centes disposent d'un support
    SRM pour les puces Ethernet Intel 8255x.</para>

    <para>Les machines Alpha peuvent fonctionner avec SRM sur une
    console graphique ou une console s&eacute;rie. ARC peut aussi
    fonctionner sur des consoles s&eacute;ries. L'&eacute;mulation VT100 avec
    8 bits de controle doit vous permettre de passer du mode
    ARC/AlphaBIOS au mode SRM sans avoir &agrave; installer une carte
    graphique.</para>

    <para>Si vous d&eacute;sirez utiliser une machine Alpha sans moniteur
    ou carte graphique, ne connectez pas de clavier ou de souris
    dessus. Branchez plutot un terminal s&eacute;rie[emulateur] sur le
    port s&eacute;rie num&eacute;ro 1. SRM disloguera alors en 9600N81. Cela
    est tr&egrave;s pratique pour d&eacute;bogguer. Attention: certains/la
    plupart (?) des codes SRMs vous pr&eacute;senteront un prompt console
    sur le port s&eacute;rie num&eacute;ro 2. Le noyau de
    d&eacute;marrage quand a lui, affichera les message de
    d&eacute;marrage sur le port s&eacute;rie num&eacute;ro 1 et
    activera la console sur ce port aussi. <emphasis>Cela peut porter
    &agrave; confusion.</emphasis></para>


    <para>La plupart des machines Alpha disposant d'un bus PCI,
    peuvent utiliser des cartes VGA de type PC. Le code SRM est
    suffisant pour les faire fonctionner. Cela ne veut pas dire que
    toutes les cartes CGA PCI du march&eacute; fonctionneront sur des
    machines Alpha. Les cartes de type S3 Trio64, Mach64, et Matrox
    Millennium fonctionnent. Les vieilles cartes ISA bas&eacute;es sur
    ET4000 fonctionnent aussi pour moi. Mais poser la question autour
    de vous avant d'en acheter une.</para>

    <para>La plupart des p&eacute;riph&eacute;riques PCI du monde PC
    fonctionnent avec des machines &os; bas&eacute;es sur du
    PCI. V&eacute;rifiez le dernier fichier
    <filename>/sys/alpha/conf/GENERIC</filename> pour plus
    d'informations. V&eacute;rifiez la partie sur la machine appropri&eacute;e
    dans le cas ou vous d&eacute;sirez utilisez des cartes PCI qui
    disposent de ponts PCI. Dans certains cas vous risquez d'obtenir
    des probl&egrave;mes avec les cartes PCI qui ne g&egrave;rent pas
    correctement la parit&eacute; PCI. Cela peut conduire a des panics du
    syst&egrave;me. Le controle de parit&eacute; PCI peut &ecirc;tre
    d&eacute;sactiv&eacute; en utilisant la commande SRM suivante:</para>

    <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET PCI_PARITY OFF</userinput></screen>

    <para>Cela n'est pas un probl&egrave;me &os;, tous les syst&egrave;mes
    d'exploitation fonctionnant sur du mat&eacute;riel Alpha n&eacute;cessite
    ce contournement.</para>

    <para>Si votre syst&egrave;me contient (aussi) des slots d'extension
    EISA vous devez executer l'utilitaire de configuration EISA(ECU)
    apr&egrave;s l'installation des cartes EISA ou apr&egrave;s la
    mise &agrave; jour du micro-noyau de la console.</para>

    <para>Il y a plusieurs g&eacute;n&eacute;rations de processeurs Alpha. La
    processeur original est le 21064. Il a aussi &eacute;t&eacute;
    produit sous le nom de MOS4, les puces fabriqu&eacute; sous ce nom
    sont aussi connues sous le nom de EV4. Les nouveaux processeurs
    sont 21164, 21264, etc... Vous trouverez les d&eacute;signations
    suivantes EV4S, EV45, EV5, EV56, EV6, EV67, EV68. Les EVs
    disposant de 2 num&eacute;ros sont des versions
    am&eacute;lior&eacute;es. Par example EV45 est une version
    am&eacute;lior&eacute;e au niveau des nombre flottants et dispose
    d'une puce de 16 kBytes&eacute;par&eacute;e pour le cache I &amp;
    D, compar&eacute; &agrave; la version EV4 sur laquelle il est
    bas&eacute;. Plus grand est le nombre suivant imm&eacute;diatement
    <quote>EV</quote>, plus il est interessant (lisez: rapide/plus
    moderne).</para>

    <para>Au niveau m&eacute;moire, vous devez disposer d'au moins
    32Mbytes. J'ai r&eacute;ussi &agrave; faire fonctionner &os; sur un
    syst&egrave;me disposant de 16Mbyte, mais cela n'est pas tr&egrave;s
    amusant. Le temps de compilation a &eacute;t&eacute; divis&eacute; par 2
    lorsque j'ai disposer de 32 Mbytes. Notez que la console SRM
    n&eacute;cessite 2Mbyte de m&eacute;moire. Pour fonctionner correctement
    64 Mbytes de m&eacute;moire est le minimum recommand&eacute;.</para>

    <para>Pendant que nous sommes dans le sujet de la m&eacute;moire,
    faites attention au type de m&eacute;moire utilis&eacute; par votre
    machine. Il y a &eacute;norm&eacute;ment de configurations
    m&eacute;moire pour chaque machine.</para>

    <para>Pour finir: j'esp&egrave;re que les informations ci-dessus
    seront suffisantes pour un utilisateur novice
    d'Alpha. N'h&eacute;sitez pas &agrave; poser des questions sir quelque
    chose n'est pas clair apr&egrave;s la lecture de ce document.</para>

  </sect2>

  <sect2>
    <title>Informations sp&eacute;cifiques aux syst&egrave;mes</title>

    <para>Ci-dessous, vous trouverez un aper&ccedil;u du mat&eacute;riel sur
    lequel fonctionner &os;. Cette liste est amen&egrave;e &agrave; grossir,
    un coup d'oeil &agrave; <filename>/sys/alpha/conf/GENERIC</filename>
    vous &eacute;clairera.</para>
 
    <para>Les machines Alpha sont le plus souvent connu sous leur nom
    de code. Lorsqu'il est connu, celui-ci est list&eacute; ci-dessous
    entre parenth&egrave;ses.</para>

    <sect3>    
      <title>AXPpci33 (<quote>NoName</quote>)</title>

      <para>Le NoName est une carte m&egrave;re &agrave; base de
      b&eacute;b&eacute;-AT, bas&eacute;ee sur le processeur 21066 LCA
      (Low Cost Alpha). La puce LCA inclue toute la logique pour
      g&eacute;rer un bus PCI et le sous-syst&egrave;me
      m&eacute;moire. Toute ceci con&ccedil;ut &agrave; un faible
      prix.</para>

      <para>Du &agrave; la limitation de l'interface m&eacute;moire, le
      syst&egrave;me n'est pas particuli&egrave;rement r&eacute;pide
      dans le cas ou il ne dispose pas de cache.Comme vous pourrez
      vous en apercevoir, ce processeur est comparable &agrave; un
      21064 (premi&egrave;re g&eacute;n&eacute;ration de processeur
      Alpha). Ces cartes m&egrave;res peuvent &ecirc;tre trouv&eacute;
      &agrave; un prix tr&egrave;s bas maintenant. Il correspond
      &agrave; un v&eacute;ritable CPU 64 bit, donc ne vous attendez
      pas &agrave; des miracles tant que la vitesse n'augmente
      pas.</para>

      <para>Fonctionnalit&eacute;s:</para>
        <itemizedlist>
          <listitem>
	    <para>Processeurs Alpha 21066 &agrave; 166 MHz ou 21066A
            CPU &agrave; 233MHz. Les processeurs 21068 sont aussi
            disponibles mais sont plus lents.</para>
	  </listitem>
	  <listitem>
	    <para>Bcache embarqu&eacute; / cache de niveau 2: 0, 256k
            ou 1 Mbyte (utilisation des puces DIL)</para>
	  </listitem>
	  <listitem>
	    <para>Souris PS/2 & port clavier OU clavier 5 broches DIN
            (2 mod&egrave;les de carte m&egrave;re)</para>
	  </listitem>
	  <listitem>
	    <para>M&eacute;moire:</para>
              <itemizedlist>
               <listitem>
	         <para>Longueur du bus: 64 bits</para>
               </listitem>
               <listitem>
                 <para>Style PS/2, 72 pin 36 bit Fast Page Mode SIMMs</para>
               </listitem>
               <listitem>
	         <para>70ns ou inf&eacute;rieur</para>
               </listitem>
               <listitem>
                 <para>install&eacute; par paire</para>
               </listitem>
               <listitem>
               <para>4 emplacements SIMM</para>
               </listitem>
               <listitem>
	         <para>utilisation ECC</para>
               </listitem>
              </itemizedlist>
	  </listitem>
	  <listitem>
	    <para>512kB de Flash ROM Flash pour le code de console.</para>
	  </listitem>
	  <listitem>
	    <para>2 ports s&eacute;ries 16550A</para>
	  </listitem>
	  <listitem>
	    <para>1 port parall&egrave;le</para>
	  </listitem>
	  <listitem>
	    <para>interface pour disquette</para>
	  </listitem>
	  <listitem>
	    <para>1 interface IDE embarqu&eacute;e</para>
	  </listitem>
	  <listitem>
	    <para>Extensions:</para>
	    <itemizedlist>
	      <listitem>
	        <para>3 emplacements 32 bit PCI (1 est partag&eacute; avec
                de l'ISA)</para>
	      </listitem>
	      <listitem>
	        <para>5 emplacements ISA (1 est partag&eacute; avec le
                PCI)</para>
	      </listitem>
	    </itemizedlist>
	  </listitem>
	  <listitem>
	    <para>Fast SCSI int&eacute;gr&eacute; grace &agrave; l'utilisation
            d'une puce Symbios 53C810</para>
	  </listitem>
	</itemizedlist>

      <para>Les cartes NoName peuvent disposer d'un micro-noyau de
      console SRM <emphasis>ou</emphasis> ARC dans la ROM flash. La
      ROM flash ne permet par de contenir les deux version en m&ecirc;me
      temps et de choisir par logiciel quelle code utiliser. Mais vous
      n'avez besoin que du code SRM de toute fa&ccedil;on.</para>

      <para>Le cache sur les cartes NoNames est une puce &agrave; 15 ou 20
      ns. Avec un cache de 256kBytes vous aurez l'impression d'avoir
      une carte m&egrave;re de 486. Les puces de de cache de 1Mbyte sont
      tr&egrave;s rare. Un minimum de 256kBytes de cache est recommand&eacute;
      pour une performance acceptable. Avec moins de cache le
      syst&egrave;me est vraiment trop lent.</para>

      <para>La carte m&egrave;re NoName dispose d'un connecteur standard
      d'alimentation PC/AT. Elle dispose aussi d'une connecteur
      d'alimentation 3.3 Volts. Il n'y a pas besoin de se fatiguer
      &agrave; trouver une nouvelle source d'alimentation. Le 3.3 Volts
      est n&eacute;cessaire uniquement dans le cas ou vous utilisez des
      cartes d'extension PCI 3.3 Volts. Elles sont tr&egrave;s rare.</para>

      <para>L'interface IDE est support&eacute;e par &os; et n&eacute;cessite
      la ligne suivante dans le fichier de configuration du noyau:</para>

      <programlisting>device ata</programlisting>

      <para>L'interface ATA interface utilise l'irq 14.</para>

      <para>La console SRM <emphasis>ne permet n&eacute;anmoins pas de
      d&eacute;marrer</emphasis> depuis des disques IDE. Cela veut dire que
      vous devez utiliser un disque SCSI pour p&eacute;riph&eacute;rique de
      d&eacute;marrage.</para>

      <para>Les cartes NoName semblent t&ecirc;tues lorsqu'elles
      utilisent des consoles s&eacute;ries. Elles n&eacute;cessitent</para>
      <screen>&gt;&gt;&gt; <userinput>SET CONSOLE SERIAL</userinput></screen>
      <para>avant de fonctionner. Le simple faire de mettre le clavier
      sur la machine ne suffit pas, comme sur la plupart des autres
      mod&egrave;les d'Alpha. Le retour &agrave; une console graphique
      n&eacute;cessite </para>
      <screen>&gt;&gt;&gt; <userinput>SET CONSOLE GRAPHICS</userinput></screen>
      <para>sur la console s&eacute;rie.</para>

      <para>Il y a eut diff&eacute;rents retour sur le fait que vous devez
      presser les touches
      <keycap>Control</keycap>-<keycap>Alt</keycap>-<keycap>Del</keycap> 
      pour capter l'attention de la console SRM. Je ne l'ai jamais
      not&eacute; moi-m&ecirc;me, mais si sachez le, si vous obtenez un
      &eacute;cran blanc apr&egrave;s le d&eacute;marrage.</para>

      <para>V&eacute;rifiez que vous utilis&eacute; de vrais barrette
      SIMMs 36 bit et uniquement des DRAM FPM (Fast Page Mode). Les
      DRAM EDO ou les barrettes SIMM avec de fausse parit&eacute;
      <emphasis> ne fonctionne pas </emphasis>. La carte utilise les 4
      bits suppl&eacute;mentaires pour l'ECC. Les barrettes SIMM FPM
      33 bits ne fonctionneront pas pour les m&ecirc;mes
      raisons.</para>

      <para>Si vous avez le choix, prenez la variante de carte m&egrave;re
      de style PS/2. En plus de vous donner un port suppl&eacute;mentaire
      pour la souris, elle est directement support&eacute;e par Tru64
      Unix, dans le cas ou vous voudriez le faire fonctionner. La
      variante avec un connecteur <quote>DIN</quote> doit fonctionner
      correctement avec &os;.</para>

      <para>La lecture du <ulink
      url="ftp://ftp.digital.com/pub/DEC/axppci/design_guide.ps">
      manuel OEM</ulink> est recommand&eacute;.</para>

      <para>Le fichier de configuration du noyau pour un noyau NoName
      doit contenir la ligne:</para>

      <programlisting>options	DEC_AXPPCI_33   cpu	EV4</programlisting>

    </sect3>

    <sect3>
      <title>Universal Desktop Box (UDB ou <quote>Multia</quote>)</title>

      <note><para>Multia supporte les processeurs Intel ou Alpha. Nous
      assumerons que nous utilisons un Alpha.</para></note>

      <para>Multia est destin&eacute; &agrave; &ecirc;tre une sorte de
      station de travail personnelle. Il existe
      &eacute;norm&eacute;ment de version, v&eacute;rifiez donc bien
      ce que vous avez.</para>


      <para>Fonctionnalit&eacute;s:</para>
        <itemizedlist>
	  <listitem>
	    <para>processeur Alpha 21066 &agrave; 166 MHz ou  21066A
            &agrave; 233MHz</para>
	  </listitem>
	  <listitem>
	    <para>Bcache embarqu&eacute; / cache de niveau 2: module de
            cache 256 kByte de type COAST; les mod&egrave;les &agrave; 233MHz
            disposent de 512kByte de cache; les mod&egrave;les &agrave; 166MHz
            sont vendus avec 256kB de cache</para>
	  </listitem>
	  <listitem>
            <para>port souris PS/2 & clavier</para>
	  </listitem>
          <listitem>
            <para>m&eacute;moire:</para>
              <itemizedlist>
               <listitem>
                 <para>longueur du bus: 64 bits</para>
               </listitem>
               <listitem>
                 <para>barrettes SIMM de type PS/2 72 pin 36 bit Fast
                 Page Mode</para>
               </listitem>
               <listitem>
                 <para>70ns ou inf&eacute;rieur</para>
               </listitem>
               <listitem>
                 <para>les barrette SIMMs sont &agrave;
                 install&eacute;es par paire</para>
               </listitem>
               <listitem>
               <para>4 emplacements de barrette SIMM</para>
               </listitem>
               <listitem>
                 <para>utilisation de ECC</para>
               </listitem>
              </itemizedlist>
          </listitem>
	  <listitem>
            <para>2 ports s&eacute;rie 16550A</para>
	  </listitem>
	  <listitem>
	    <para>1 port parall&egrave;le</para>
	  </listitem>
	  <listitem>
	    <para>1 interface de lecteur de disquette</para>
	  </listitem>
	  <listitem>
            <para>1 pont Intel 82378ZB PCI vers ISA</para>
	  </listitem>
	  <listitem>
            <para>1 carte 10Mb Ethernet (bas&eacute; sur une puce 21040),
            avec un connecteur AUI ou 10base2</para>
	  </listitem>
	  <listitem>
            <para>Extension:</para>
	      <itemizedlist>
		<listitem>
		  <para>1 emplacement 32 bit PCI</para>
		</listitem>
		<listitem>
	          <para>2 emplacements PCMCIA</para>
		</listitem>
              </itemizedlist>
	  </listitem>
	  <listitem>
            <para>carte son Crystal CS4231 ou AD1848
            int&eacute;gr&eacute;e</para>
	  </listitem>
	  <listitem>
            <para>Fast SCSI int&eacute;gr&eacute;, grace &agrave; l'utilisation
            d'une puce Symbios 53C810[A] sur une carte PCI</para>
	  </listitem>
	</itemizedlist>

      <para>Multia dispose d'assez de m&eacute;moire ROM flash pour
      enregistrer les codes SRM et ARC en m&ecirc;me temps et permettre
      la s&eacute;lection logicielle de l'un ou l'autre.</para>

      <para>L'adaptateur vid&eacute;o TGA int&eacute;gr&eacute;, n'est
      <emphasis>pas</emphasis> pour l'instant utilisable comme console
      sous &os;. Vous devrez utiliser une console s&eacute;rie.</para>

      <para>Multia ne dispose que d'un emplacement d'extension PCI 32
      bits, et il n'est utilisable que pour une faible portion de
      cartes PCI. En sacrifiant cet emplacement PCI, vous pourrez
      ajouter une disque dur de 3.5&quot;. Il se peut que cet ajout
      soit inclu avec votre Multia. Ajouter un disque de 3.5&quot;
      suppl&eacute;mentaire <emphasis>n'est pas</emphasis> recommend&eacute;
      du &agrave; la limitation de l'alimentation et du fabile
      refroidissement de ce mod&egrave;le.</para>

      <para>Multia dispose aussi de deux emplacement d'extension
      PCMCIA. Il ne sont pas actuellement support&eacute;s par &os;.</para>

      <para>Le processeur peut ou peut ne pas &ecirc;tre
      soud&eacute;. V&eacute;rifier cela avec d'envisager une mise
      &agrave; jour du processeur. Les mod&egrave;les de base de
      Multia ont un processeur soud&eacute; sur la carte
      m&egrave;re.</para>

      <para>Multia dispose de 2 ports s&eacute;ries, mais un seul
      connecteur externe 25 pin sub-D. Le FAQ des Multia explique
      comment cr&eacute;er votre propre cable Y pour utiliser les deux
      ports.</para>

      <para>Bien que le SRM Multia supporte le d&eacute;marrage depuis un
      lecteur de disquette, cela peut poser des
      probl&egrave;mes. Typiquement les messages d'erreurs sont:</para>

      <screen>*** Soft Error - Error #10 - FDC: Data overrun or underrun</screen>

      <para>Cela n'est pas une probl&egrave;me de &os;, c'est un
      probl&egrave;me SRM. La meilleur fa&ccedil;on d'installer &os; est de le
      faire depuis un CDROM SCSI..</para>

      <para>Il y a eut diff&eacute;rents retour sur le fait que vous devez
      presser les touches
      <keycap>Control</keycap>-<keycap>Alt</keycap>-<keycap>Del</keycap> 
      pour capter l'attention de la console SRM. Je ne l'ai jamais
      not&eacute; moi-m&ecirc;me, mais si sachez le, si vous obtenez un
      &eacute;cran blanc apr&egrave;s le d&eacute;marrage.</para>

      <para>La carte son fonctionne correctement via le gestionnaire
      de p&eacute;riph&eacute;rique &man.pcm.4; et une ligne dans le fichier
      de configuration du noyau pour la puce Crystal CS4231:</para>

      <programlisting>device pcm</programlisting>

      <para>Le p&eacute;riph&eacute;rique sonore r&eacute;side au port
      0x530, et utilise l'irq 9 avec le drq 3. Vous devez de plus
      sp&eacute;cifier le drapeau 0x15 dans le fichier
      <filename>device.hints</filename>.</para>

      <para>Je n'ai pas r&eacute;ussi &agrave; faire fonctionner correctement
      le son avec un Multia et une puce AD1848.</para>

      <para>En v&eacute;rifiant &agrave; l'&eacute;coute, je me suis
      souvenu de la faible alimentation du processeur
      166MHz. L'&eacute;coute des MP3 est acceptable si vous utilisez
      un taux de 22kHz.</para>

      <para>Les Multia sont connues pour arr&egrave;ter de fonctionner du
      a des probl&egrave;mes de chaleur. L'etroitesse de la boite ne
      permet vraiment pas d'obtenir une bonne ventilation. Positionnez
      donc votre Multia &agrave; la verticale, ne la mettez pas &agrave;
      l'horizontale (<quote>style pizza</quote>). Remplacer le
      ventilateur par un rafraichissant plus est vraiment
      recommand&eacute;. Vous pouvez aussi couper un des fils du senseur
      de vitesse du ventilateur. Une fois couper, le ventilateur
      tournera &agrave; une vitesse (et un bruit) plus rapide. Faites
      attention aux cartes PCI avec une forte consommation
      d'&eacute;nergie. Si votre syst&egrave;me Multia cesse de fonctionner
      suite &agrave; un probl&egrave;me de chaleur, consultez les pages du
      <ulink url="http://www.netbsd.org/">site web de NetBSD</ulink>
      pour de l'aide sur la fa&ccedil;on de le remettre en marche.</para>

      <para>Le pont Intel 82378ZB PCI vers ISA permet d'utiliser un
      disque IDE. Cela n&eacute;cessite la ligne de configuration du noyau
      suivante:</para>

      <programlisting>device ata</programlisting>

      <para>L'interface ATA utilise l'IRQ 14.</para>

      <para>Les espacements des connecteurs IDE sont espac&eacute;s pour
      des disques de portable de 2.5&quot;. Un disque IDE de 3.5&quot;
      de pourra donc pas &ecirc;tre utilis&eacute;. N&eacute;anmoins sans
      sacrifier un emplacement PCI vous disposer d'un disque IDE. La
      console SRM ne permet pas malgr&eacute; tout de d&eacute;marrer depuis
      un disque IDE. vous devez disposer d'un disque SCSI comme disque
      de d&eacute;marrage.</para>

      <para>Dans le cas ou vous d&eacute;sirez changer le disque dur
      interne: le cable interne reliant la carte PCI au disque dur
      <emphasis>2.5&quot;</emphasis> &agrave; une taille plus petite que
      les cables SCSI standards. Sinon il ne pourrait aller avec les
      disque de 2.5&quot;. Il existe des cartes PCI disposant d'un
      cable standard, permettant de brancher un disque dur SCSI
      standard.</para>

      <para>Encore une fois, je ne recommande pas d'essayer de
      remplacer le disque dur interne. Utilisez le connecteur SCSI
      externe et mettez le disque dur dans un boitier externe. Les
      Multia sont suffisement chaud sans cela. Dans la plupart des cas
      vous disposerez du connecteur 50 broches SCSI, mais certains
      mod&egrave;les de Multia peuvent ne pas comporter de disque ni de
      connecteur. Encore un point &agrave; v&eacute;irifer avec l'achat.</para>

      <para>Le fichier de configuration du noyau doit contenir la
      ligne suivante pour un syst&egrave;me Multia:</para>

      <programlisting>options DEC_AXPPCI_33 cpu EV4</programlisting>

      <para>La lecture du document <ulink
      url="http://www.netbsd.org/Ports/alpha/multiafaq.html">
      http://www.netbsd.org/Ports/alpha/multiafaq.html</ulink> ou
      <ulink
      url="http://www.brouhaha.com/~eric/computers/udb.html">
      http://www.brouhaha.com/~eric/computers/udb.html</ulink> est
      recommand&eacute;.</para>

    </sect3>

    <sect3>
      <title>Station de travail personnelle (<quote>Miata</quote>)</title>

      <para>La Miata est une machine de type tour con&ccedil;ues pour
      fonctionner sur un bureau. Il existe plusieurs type de
      Miata. L'original de Miata est le mod&egrave;le MX5. Du au
      diff&eacute;rents probl&egrave;mes de conception mat&eacute;rielle, une
      nouvelle conception a &eacute;t&eacute; faite, donnant le mod&egrave;le
      MiataGL. Quoiqu'il en soit les variantes ne sont pas facilement
      distinguables &agrave; premi&egrave;re vue en regardant le boitier. La
      fa&ccedil;on la plus simple est de chercher &agrave; l'arri&egrave;re des
      machines si il y a deux connecteurs USB. Si oui, c'est un
      MiataGL. Les mod&egrave;les MX5 semblent &ecirc;tre les plus
      utilis&eacute;s sur le march&eacute;.</para>

      <para>La d&eacute;signation syst&egrave;me resemble &agrave;
      <quote>Personal Workstation 433a</quote>. Personal Workstation
      est souvent r&eacute;duit &agrave; PWS. Cela veut dire qu'il
      dispose d'un processeur 433 MHz et que sa vie &agrave; commencer
      sous une station de travail WinNT (le <quote>a</quote> de la
      fin). Les syst&egrave;mes pr&eacute;vus pour fonctionner sous
      Tru64 Unix ou OpenVMS afficheront <quote>433au</quote>. Les
      syst&egrave;mes Miatas-WinNT sont souvent
      pr&eacute;configur&eacute;es avec un lecteur de CDROM IDE. En
      g&eacute;n&eacute;ral ces syst&egrave;mes sont
      d&eacute;sign&eacute; comme PWS[433,500,600]a[u].</para> 


      <para>Il existe un mod&egrave;le de Miata avec un syst&egrave;me de
      refroidissement de  processeur sp&eacute;cifique de Kryotech. Le
      Kryotech &agrave; un refroidissement sp&eacute;cial et est enferm&eacute;
      dans une boite diff&eacute;rente..</para>

      <para>Fonctionnalit&eacute;s:</para>
        <itemizedlist>
	  <listitem>
	    <para>processeurs Alpha 21164A EV56 &agrave; 433, 500 ou
            600MHz</para>
	  </listitem>
	  <listitem>
	    <para>jeux de puce 21174 Core Logic (<quote>Pyxis</quote>)</para>
	  </listitem>
	  <listitem>
	    <para>Bcache / cache de niveau 3: 0, 2 ou 4 Mbytes (utilis
            un module de cache)</para>
	  </listitem>
	  <listitem><para>M&eacute;moire:</para>
	    <itemizedlist>
	      <listitem>
	        <para>longeur du bus: 128 bits wide, protection par ECC</para>
	      </listitem>
	      <listitem>
	        <para>barrette DIMMS 72 bit wide SDRAMs, 
		install&eacute;es par paire</para>
              </listitem>
	      <listitem>
		<para>6 emplacement pour les barrette DIMM</para>
	      </listitem>
	      <listitem>
		<para>un maximum de 1.5 GBytes de m&eacute;moire</para>
	      </listitem>
	    </itemizedlist>
	  </listitem>
	  <listitem>
	    <para> Fast Ethernet int&eacute;gr&eacute;:</para>
	    <itemizedlist>
	      <listitem>
	        <para>le MX5 utilise une puce Ethernet 21142 ou 21143,
                suivant la version de la carte PCI utilis&eacute;</para>
	      </listitem>
	      <listitem>
	        <para>le MiataGL dispose d'une puce 21143</para>
	      </listitem>
	      <listitem>
	        <para>le connecteur peut &ecirc;tre 10/100 Mbit UTP, ou
                10 Mbit UTP/BNC</para>
	      </listitem>
	    </itemizedlist>
	  </listitem>
	  <listitem>
	    <para>2 interfaces de disque dur [E]IDE int&eacute;gr&eacute;s,
            bas&eacute;es sur CMD646 (MX5) ou Cypress 82C693 (MiataGL)</para>
	  </listitem>
	  <listitem>
	    <para>1 controleur Ultra-Wide SCSI Qlogic 1040 [MiataGL
            uniquement]</para>
	  </listitem>
	  <listitem>
	    <para>2 emplacements PCI 64-bit</para>
	  </listitem>
	  <listitem>
            <para>3 emplacements PCU 32-bit (derri&egrave;re un pont
            PCI-PCI DEC)</para>
	  </listitem>
	  <listitem>
            <para>3 emplacements ISA (physiquement partag&eacute;s avec
            les emplacements PCI 32 bits via un pont Intel 82378IB PCI
            vers ISA)</para>
	  </listitem>
	  <listitem>
	    <para>2 ports s&eacute;ries 16550A</para>
	  </listitem>
	  <listitem>
	    <para>1 port parall&egrave;le</para>
	  </listitem>
	  <listitem>
	    <para>port PS/2 clavier & souris</para>
	  </listitem>
	  <listitem>
	    <para>interface USB [MiataGL uniquement]</para>
	  </listitem>
	  <listitem>
	    <para>carte son int&eacute;gr&eacute;e, bas&eacute;e sur
            une puce ESS1888</para>
	  </listitem>
	</itemizedlist>

      <para>La logique des Miata est divis&eacute; en deux cartes de
      circuits imprim&eacute;es. La carte inf&eacute;rieure dispose des
      emplacements PCI et ISA ainsi que des choses comme la carte son,
      etc... La carte sup&eacute;rieure comporte le processeur, la puce
      Pyxis, la m&eacute;moire, etc.. Notez que le mod&egrave;le MX5
      diff&egrave;re du mod&egrave;le MiataGL par la carte de canal du bus
      PCI. Cela veut dire que vous ne pouvez mettre &agrave; jour votre
      carte vers un mod&egrave;le MiataGL (avec la nouvelle puce Pyxis),
      cela n&eacute;cessite une carte de canal PCI
      diff&eacute;rente. Apparemment une carte processeur MiataGL avec un
      canal PCI de MX5 fonctionne, mais cela n'est d&eacute;finitivement
      pas support&eacute; ni teste&eacute;. Tout le reste (boitier, cablage,
      etc...) est identique entre le MX5 et le MiataGL.</para>

      <para>Les MX5 ont des probl&egrave;mes avec les emplacements PCI
      64-bit et le DMA, lorsque le DMA d&eacute;passe un espace de
      pagination. Les emplacements 32 bits n'ont pas ce probl&egrave;mes
      car le pont PCI-PCI ne permet pas ce type de transfert. Le code
      SRM reconnait le probl&egrave;me et refuse de d&eacute;marrer un
      syst&egrave;me si une carte PCI 64 bit est pr&eacute;sente et qu'il ne
      la connait pas. Les <quote>bonnes</quote>cartes 64 bits pour SRM
      peuvent utiliser les emplacements 64 bits.</para>

      <para>Si vous d&eacute;sirez ne pas tenir compte de SRM, vous pouvez
      taper <userinput>set pci_device_override</userinput> &agrave;
      l'invite de commande SRM. Ne vous &eacute;tonnez pas si vos
      donn&eacute;es disparaissent mist&eacute;riseusement.</para>

      <para>La commande exacte est:</para>

      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET PCI_DEVICE_OVERRIDE <replaceable>&lt;vendor_id&gt;</replaceable><replaceable>&lt;device_id&gt;</replaceable></userinput></screen>

      <para>Par exemple:</para>

<screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET PCI_DEVICE_OVERRIDE 88c15333</userinput></screen>

      <para>Une approche plus radicale est d'utiliser:</para>

<screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET PCI_DEVICE_OVERRIDE -1</userinput></screen>

      <para>Cela d&eacute;sactive la v&eacute;rification de l'ID PCI, cela
      vous permet d'installer n'importe quelle carte PCI sans que son
      ID soit v&eacute;rifier. Pour que cela fonctionne vous devez avoir
      une version raisonnablement r&eacute;cente de SRM.</para>
      <important><para>Si vous faites cela, c'est &agrave; vos propres
      risques...</para></important>


      <para>Le noyau &os; rapporte lorsqu'il voit des puces Pyxis
      boggu&eacute;es:</para>

<screen>Sep 16 18:39:43 miata /kernel: cia0: Pyxis, pass 1
Sep 16 18:39:43 miata /kernel: cia0: extended capabilities: 1&lt;BWEN&gt;
Sep 16 18:39:43 miata /kernel: cia0: WARNING: Pyxis pass 1 DMA bug; no bets...</screen>

      <para>Un test sur MiataGL donne :</para>

<screen>Jan  3 12:22:32 miata /kernel: cia0: Pyxis, pass 1
Jan  3 12:22:32 miata /kernel: cia0: extended capabilities: 1&lt;BWEN&gt;
Jan  3 12:22:32 miata /kernel: pcib0: &lt;2117x PCI host bus adapter&gt; on cia0</screen>

      <para>Le MiataGL n'a pas le probl&egrave;me de DMA du MX5. Les
      cartes PCI qui posent probl&egrave;me au SRM du MX5 sont
      accept&eacute;es sans probl&egrave;me dans les emplacements 64 bits de
      MiataGL.</para>

      <para>La derni&egrave;re r&eacute;vision de la carte m&egrave;re des MX5,
      contient un contournement mat&eacute;riel pour ce bogue. SRM ne
      connait rien de ceci et r&eacute;agit comme avant avec les cartes
      inconnues. Comme le fait aussi le noyau &os;.</para>

      <para>Le SRM Miata permet de d&eacute;marrer depuis les lecteurs de
      CDROM IDE. Les d&eacute;marrages sur disques IDE fonctionnent pour
      les disques MiataGL et MX5, vous pouvez donc mettre la partition
      principale de &os; sur un disque IDE. La vittesse de transfert
      est de l'ordre de 14 Mbytes/sec sur un syst&egrave;me MX5. La puce
      CMD646 du Miata permet de supporter jusque'au mode WDMA2 car
      cette puce est trop boggu&eacute;e pour utiliser le UDMA.</para>

      <para>Les Miata MX5 utilisent g&eacute;n&eacute;ralement des adaptateurs
      SCSI bas&eacute;s sur des Qlogic 1040. Ils permettent de d&eacute;marrer
      le noyau depuis la console SRM. Notez que les cartes Adaptec
      <emphasis>ne permettent pas</emphasis> de d&eacute;marrer depuis la
      console SRM Miata.</para>

      <para>Le MiataGL dispose d'un pont PCI-PCI plus rapide que celui
      des MX5. Certains canaux des MX5 disposent de la
      <emphasis>m&ecirc;me</emphasis> puce que le MiataGL. De toute
      fa&ccedil;on il existe &eacute;norm&eacute;ment de variantes.</para>

      <para>Toutes les cartes VGA ne fonctionnent pas d&eacute;rri&egrave;re
      le pont PCI-PCI. Cela se manifeste par aucun affichage
      vid&eacute;o. La solution consiste &agrave; mettre la carte VGA dans un
      emplacement 64 bits PCI <quote>avant</quote> le pont.</para>

      <para>Les MX5 et MiataGL disposent d'une puce sonore, un
      ESS1888. C'est une &eacute;mulation SoundBlaster qui peut &ecirc;tre
      activer en mettant la ligne</para>
      <programlisting>device pcm device	sbc</programlisting>

      <para>dans le fichier de configuration du noyau.</para>

      <para>Dans le cas ou votre Miata dispose d'une carte de cache
      optionnelle, c&eacute;rifiez qu'elle est bien enfonc&eacute;e. Des
      pertes de cache ont &eacute;t&eacute; observ&eacute;es causant des
      crashes(cela n'est pas surprenant, mais assez emb&ecirc;tant lors
      de d&eacute;bogguage). Le module de cache est identique sur les MX5
      ou les MiataGL.</para>

      <para>L'installation d'un cache de 2mb, mis &agrave; part le gain de
      10-15% de vitesse (bas&eacute; sur la temps de compilation de
      buildworld), baisse la bande passante pour la lecture PCI DMA
      des cartes PCI 64 bits. Un test sur une carte 64-bit Myrinet
      r&eacute;sulte d'une baisse de 149 Mbytes/sec &agrave; 115
      Mbytes/sec. Ceci est un point important &agrave; garder dans le cas
      ou vous devez effectuer des transferts tr&egrave;s rapide avec les
      adaptateurs PCI 64 bits.</para>

      <para>Le changement vers un processeur plus rapide est tr&egrave;s
      simple; remplacez le processeur et modifiez les dipswitch de
      multiplieur de l'horloge &agrave; la vitesse du nouveau
      processeur.</para>

      <para>Si vous obtenez des erreurs SRM comme</para>

      <screen>ERROR: scancode 0xa3 not supported on PCXAL</screen> 

      <para>apr&egrave;s avoir arr&eacute;ter &os;, vous devez mettre &agrave;
      jour votre micro-code SRM en version V7.2-1 ou sup&eacute;rieure. La
      premi&egrave;re version SRM disponible peut se trouver sur le CD de
      mise &agrave; jour du micro-code V5.7, ou sur le site <ulink
      url="http://www.compaq.com/">http://www.compaq.com/</ulink>. Ce
      probl&egrave;me SRM a &eacute;t&eacute; corrig&eacute; sur les
      mod&egrave;les Miata MX5 et Miata GL.</para>

      <para>L'USB est support&eacute; &agrave; partir de &os; 4.1 et
      sup&eacute;rieur.</para>

      <para>D&eacute;connectez le cordon d'alimentation avant de
      d&eacute;sassembler la machine, le bouton d'alimentation logicielle,
      garde une partie de la carte sous tension
      <emphasis>m&ecirc;me</emphasis> lorsque la machine est
      &eacute;teinte.</para>

      <para>Le fichier de configuration du noyau pour un mod&egrave;le
      Miata doit contenir:</para>

      <programlisting>options DEC_ST550 cpu EV5</programlisting>
    </sect3>

    <sect3>
      <title>Evaluation Board 64 family</title>

      <para>In its attempts to popularize the Alpha CPU DEC produced a number 
      of so called Evaluation Boards. Members of this family are EB64, EB64+,
      AlphaPC64 (codename <quote>Cabriolet</quote>). 
      A non-DEC member of this family is the Aspen Alpine.
      The EB64 family of evaluation boards has the following 
      feature set:</para>

      <itemizedlist>
        <listitem>
          <para>21064 or 21064A CPU, 150 to 275 MHz</para>
        </listitem>
        <listitem>
          <para>memory:</para>
             <itemizedlist>
               <listitem>
                 <para>memory buswidth: 128 bit</para>
               </listitem>
               <listitem>
                 <para>PS/2 style 72 pin 33 bit Fast Page Mode SIMMs</para>
               </listitem>
               <listitem>
	         <para>70ns or better</para>
               </listitem>
               <listitem>
                 <para>installed in sets of 4</para>
               </listitem>
               <listitem>
                 <para>8 SIMM sockets</para>
               </listitem>
               <listitem>
                 <para>uses parity memory</para>
               </listitem>
             </itemizedlist>
        </listitem>
        <listitem>
	  <para>Bcache / L2 cache: 0, 512 kByte, 1 Mbyte or 2 Mbytes</para>
        </listitem>
        <listitem>
          <para>21072 (<quote>APECS</quote>) chip set</para>
        </listitem>
        <listitem>
          <para>Intel 82378ZB PCI to ISA bridge chip (<quote>Saturn</quote>)
          </para>
        </listitem>
        <listitem>
          <para>dual 16550A serial ports</para>
        </listitem>
        <listitem>
          <para>parallel printer port</para>
        </listitem>
        <listitem>
          <para>Symbios 53C810 Fast-SCSI (not on AlphaPC64)</para>
        </listitem>
        <listitem>
          <para>IDE interface (only on AlphaPC64)</para>
        </listitem>
        <listitem>
          <para>embedded 10 Mbit Ethernet (not on AlphaPC64)</para>
        </listitem>
        <listitem>
          <para>2 PCI slots (4 slots on AlphaPC64)</para>
        </listitem>
        <listitem>
          <para>3 ISA slots</para>
        </listitem>
      </itemizedlist>

      <para>Aspen Alpine is slightly different, but is close enough to the 
      EB64+ to run an EB64+ SRM EPROM (mine did..). The Aspen Alpine does 
      not have an embedded Ethernet, has 3 instead of 2 PCI slots. It comes 
      with 2 Mbytes of cache already soldered onto the mainboard. It has 
      jumpers to select the use of 60, 70 or 80ns SIMM speeds.</para>

      <para>36 bits SIMMs work fine, 3 bits simply remain unused. Note
      the systems use Fast Page Mode memory, not EDO memory.</para>

      <para>The EB64+ SRM console code is housed in an UV-erasable EPROM. No 
      easy flash SRM upgrades for the EB64+ The latest SRM version available 
      for EB64+ is quite ancient anyway.</para>

      <para>The EB64+ SRM can boot both 53C810 and Qlogic1040 SCSI adapters. 
      Pitfall for the Qlogic is that the firmware that is down-loaded by 
      the SRM onto the Qlogic chip is very old. There are no updates for the 
      EB64+ SRM available. So you are stuck with old Qlogic bits too. 
      I have had quite some problems when I wanted to use Ultra-SCSI drives 
      on the Alpine with Qlogic. The &os; kernel can be compiled to include 
      a much newer Qlogic firmware revision. This is not the default because 
      it adds hundreds of kBytes worth of bloat to the kernel. In &os; 4.1 
      and later the isp firmware is contained in a kernel loadable module. 
      All of this might mean that you need to use a non-Qlogic adapter to 
      boot from.</para>

      <para>AlphaPC64 boards generally come with ARC console firmware. 
      SRM console code can be loaded from floppy into the Flash ROM.</para>

      <para>The IDE interface of the AlphaPC64 is not bootable from the 
      SRM console.</para>

      <para>Note that the boards require a power supply that supplies
      3.3 Volts for the CPU.</para>

      <para>For the EB64 family machines the kernel config file must contain:</para>
      <programlisting>options	DEC_EB64PLUS            
cpu	EV4</programlisting>

   </sect3>

   <sect3>
      <title>Evaluation Board 164 (<quote>EB164, PC164, PC164LX, 
      PC164SX</quote>) family</title>

      <para>EB164 is a newer design evaluation board, based on the 21164A 
      CPU. This design has been used to <quote>spin off</quote> multiple variations, 
      some of which are used by OEM manufacturers/assembly shops. Samsung 
      did its own PC164LX which has only 32 bit PCI, whereas the Digital 
      variant has 64 bit PCI.</para>

      <itemizedlist>
        <listitem>
          <para>21164A, multiple speed variants [EB164, PC164, PC164LX]</para>
        </listitem>
 	<listitem>
  	  <para>21164PC [only on PC164SX]</para>
        </listitem>
        <listitem>
          <para>21174 (Alcor) chip set</para>
        </listitem>
        <listitem>
          <para>Bcache / L3 cache:  EB164 uses special cache-SIMMs</para>
        </listitem>
        <listitem>
          <para>memory bus: 128 bit / 256 bit</para>
        </listitem>
        <listitem>
          <para>memory:</para><itemizedlist>
	    <listitem>
              <para>PS/2 style SIMMs in sets of 4 or 8</para>
            </listitem>
	    <listitem>
	      <para>36 bit, Fast Page Mode, uses ECC, [EB164 / PC164]</para>
            </listitem>
	    <listitem>
	      <para>SDRAM DIMMs in sets of 2, uses ECC [PC164SX / PC164LX]
	      </para>
            </listitem></itemizedlist>
        </listitem>
        <listitem>
           <para>2 16550A serial ports</para>
        </listitem>
        <listitem>
           <para>PS/2 style keyboard & mouse</para>
        </listitem>
        <listitem>
           <para>floppy controller</para>
        </listitem>
        <listitem>
           <para>parallel port</para>
        </listitem>
        <listitem>
           <para>32 bits PCI</para>
        </listitem>
        <listitem>
           <para>64 bits PCI [some models]</para>
        </listitem>
        <listitem>
           <para>ISA slots via an Intel 82378ZB PCI to ISA bridge chip</para>
        </listitem>
      </itemizedlist>

      <para>Using 8 SIMMs for a 256bit wide memory can yield interesting
      speedups over a 4 SIMM/128bit wide memory. Obviously all 8 SIMMs must
      be of the same type to make this work. The system must be explicitly
      setup to use the 8 SIMM memory arrangement. You must have 8 SIMMs,
      4 SIMMs distributed over 2 banks will not work. For the AlphaPC164
      you can have a maximum of 1Gbyte of RAM, using 8 128Mbyte 
      SIMMs. The manual indicates the maximum is 512 Mbyte.</para>

      <para>The SRM can boot from Qlogic 10xx boards or the Symbios 53C810[A].
      Newer Symbios 810 revisions like the Symbios 810AE are not recognized by
      the SRM on PC164. PC164 SRM does not appear to recognize a Symbios 53C895 
      based host adapter (tested with a Tekram DC-390U2W). On the other hand 
      some no-name Symbios 53C985 board has been reported to work.
      Cards like the Tekram DC-390F (Symbios875 based) have been confirmed to 
      work fine on the PC164. Unfortunately this seems to be dependent on the 
      actual version of the chip/board.</para>

      <para>Symbios 53C825[a] will also work as boot adapter. Diamond 
      FirePort, although based on Symbios chips, is not bootable by the 
      PC164SX SRM. PC164SX is reported to boot fine with Symbios825, 
      Symbios875, Symbios895 and Symbios876 based cards. In addition, Adaptec 
      2940U and 2940UW are reported to work for booting (verified on 
      SRM V5.7-1). Adaptec 2930U2 and 2940U2[W] do not work.</para>

      <para>164LX and 164SX with SRM firmware version 5.8 or later can boot 
      from Adaptec 2940-series adapters.</para>

      <para>In summary: this family of machines is <quote>blessed</quote> with a 
      challenging compatibility as far as SCSI adapters go.</para>

      <para>On 164SX you can have a maximum of 1 Gbyte of RAM. 4 regular
      256MB PC133 ECC DIMMs are reported to work just fine. Whether 512MB
      DIMMs will also work is currently unknown.</para>

      <para>PCI bridge chips are sometimes not appreciated by the 164SX, 
      they cause SRM errors and kernel panics in those cases. This seems
      to depend on the fact if the card is recognised, and therefore
      correctly initialised, by the SRM console. The 164SX' onboard 
      IDE interface is quite slow, a Promise card gives a 3-4 times 
      speed improvement.</para>

      <para>On PC164 the SRM sometimes seems to lose its variable settings. 
      <quote>For PC164, current superstition says that, to avoid losing settings,
      you want to first downgrade to SRM 4.x and then upgrade to 5.x.</quote>
      One sample error that was observed was:</para>
      <screen>ERROR: ISA table corrupt!</screen>

      <para>A sequence of a downgrade to SRM4.9, an</para>

 <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>ISACFG -INIT</userinput></screen>

      <para>followed by</para>

      <screen><prompt>&gt;&gt;&gt; </prompt><userinput>INIT</userinput></screen>

      <para>made the problem go away. Some PC164 owners report they have never seen 
      the problem. </para>

      <para>On PC164SX the AlphaBIOS allows you a selection to select SRM to
      be used as console on the next power up. This selection does 
      not appear to have any effect. In other words, you will get the 
      AlphaBIOS regardless of what you select. The fix is to reflash the 
      console ROM with the SRM code for PC164SX. This will overwrite the 
      AlphaBIOS and will get you the SRM console you desire. The SRM code 
      can be found on the Compaq Web site.</para>

      <para>164LX can either have the SRM console code or the AlphaBIOS
      code in its flash ROM because the flash ROM is too small to hold
      both at the same time.</para>

      <para>PC164 can boot from IDE disks assuming your SRM version is 
      recent enough.</para>

      <para>EB164 needs a power supply that supplies 3.3 Volts. PC164 does 
      not implement the PS_ON signal that ATX power supplies need to switch on. 
      A simple switch pulling this signal to ground allows you to run a
      standard ATX power supply.</para>

      <para>For the EB164 class machines the kernel config file must 
      contain:</para>
	<programlisting>options         DEC_EB164
cpu             EV5</programlisting>
    </sect3>

    <sect3>
      <title>AlphaStation 200 (<quote>Mustang</quote>) and 400
      (<quote>Avanti</quote>) series</title>

      <para>The Digital AlphaStation 200 and 400 series systems are early 
      low end PCI based workstations. The 200 and 250 series are 
      desktop boxes, the 400 series is a desk-side mini-tower.</para>

      <para>Features:</para>
      <itemizedlist>
        <listitem>
            <para>21064 or 21064A CPU at speeds of 166 up to 333 MHz</para>
        </listitem>
        <listitem>
          <para>DECchip 21071-AA core logic chip-set</para>
        </listitem>
        <listitem>
          <para>Bcache / L2 cache: 512 Kbytes (200 and 400 series) 
          or 2048KBytes (250 series)</para>
        </listitem>
        <listitem>
  	<para>memory:</para>
          <itemizedlist>
            <listitem>
  	      <para>64 bit bus width</para>
            </listitem>
  	    <listitem>
              <para>8 to 384 MBytes of RAM</para>
            </listitem>
  	    <listitem>
  	      <para>70 ns or better Fast Page DRAM</para>
            </listitem>
	    <listitem>
              <para>in three pairs (200 and 400 series)</para>
            </listitem>
	    <listitem>
	      <para>in two quads, so banks of four. (250 series)</para>
            </listitem>
	    <listitem>
	       <para>the memory subsystem uses parity</para>
	    </listitem>
          </itemizedlist>
        </listitem>
        <listitem>
          <para>PS/2 keyboard and mouse port</para>
        </listitem>
          <listitem>
          <para>two 16550 serial ports</para>
        </listitem>
        <listitem>
          <para>parallel port</para>
        </listitem>
        <listitem>
          <para>floppy disk interface</para>
        </listitem>
        <listitem>
          <para>32 bit PCI expansion slots (3 for the AS400-series, 
  	2 for the AS200 & 250-series)</para>
        </listitem>
        <listitem>
          <para>ISA expansion slots (4 for the AS400-series, 
  	  2 for the AS200 & 250-series) 
          (some ISA/PCI slots are physically shared)</para>
        </listitem>
        <listitem>
          <para>embedded 21040-based Ethernet (200 & 250 series)</para>
        </listitem>
        <listitem>
          <para>embedded Symbios 53c810 Fast SCSI-2 chip</para>
        </listitem>
        <listitem>
          <para>Intel 82378IB (<quote>Saturn</quote>) PCI-ISA bridge chip</para>
        </listitem>
        <listitem>
          <para>graphics is embedded TGA or PCI VGA (model dependent)</para>
        </listitem>
        <listitem>
          <para>16 bit sound (on 200 & 250 series)</para>
        </listitem>
      </itemizedlist>

      <para>The systems use parity memory SIMMs, but these do not need 36 bit 
      wide SIMMs. 33 bit wide SIMMs are sufficient, 36 bit SIMMs are 
      acceptable too. EDO or 32 bit SIMMs will not work. 4, 8, 16, 32 and 
      64 Mbyte SIMMs are supported.</para>

      <para>The AS200 & AS250 sound hardware is reported to work OK assuming 
      you have the following line in your kernel config file:</para>
      <programlisting>device pcm</programlisting>

      <para>The sound device uses port 0x530, IRQ 9 and drq 0. You also need
      to specify flags 0x10011 in the <filename>device.hints</filename> file.</para>

      <para>AlphaStation 200 & 250 series have an automatic SCSI terminator. 
      This means that as soon as you plug a cable onto the external SCSI 
      connector the internal terminator of the system is disabled. It also 
      means that you should not leave unterminated cables plugged into 
      the machine.</para>

      <para>AlphaStation 400 series have an SRM variable that controls 
      termination. In case you have external SCSI devices connected you 
      must set this SRM variable using</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET CONTROL_SCSI_TERM EXTERNAL</userinput>.</screen>

      <para>If only internal SCSI devices are present use:</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET CONTROL_SCSI_TERM INTERNAL</userinput></screen>

      <para>For the AlphaStation-[24][05]00 machines the kernel config file 
      must contain:</para>
      <programlisting>options	DEC_2100_A50
cpu	EV4</programlisting>
    </sect3>

    <sect3>
      <title>AlphaStation 500 and 600 (<quote>Alcor</quote> &
      <quote>Maverick</quote> for EV5, <quote>Bret</quote> for EV56)</title>

      <para>AS500 and 600 were the high-end EV5 / PCI based workstations. 
      EV6 based machines have in the meantime taken their place as front 
      runners. AS500 is a desktop in a dark blue case (TopGun blue), 
      AS600 is a sturdy desk-side box. AS600 has a nice LCD panel to observe 
      the early stages of SRM startup.</para>
  
      <para>Features:</para>
      <itemizedlist>
        <listitem>
          <para>21164 EV5 CPU at 266, 300, 333, 366, 400, 433, 466, or 
  	500 MHz (AS500) or at 266, 300 or 333 MHz (AS600)</para>
        </listitem>
        <listitem>
          <para>21171 or 21172 (Alcor) core logic chip-set</para>
        </listitem>
        <listitem><para>Cache:</para>
          <itemizedlist>
            <listitem>
              <para>2 or 4 Mb L3 / Bcache (AS600 at 266 MHz)</para>
            </listitem>
            <listitem>
  	    <para>4 Mb L3 / Bcache (AS600 at 300 MHz)</para>
            </listitem>
            <listitem>
              <para>2 or 8 Mb L3 / Bcache (8 Mb on 500 MHz version only)</para>
            </listitem>
            <listitem>
              <para>2 to 16 Mb L3 / Bcache (AS600; 3 cache-SIMM slots)</para>
            </listitem>
          </itemizedlist>
        </listitem>
        <listitem>
          <para>memory buswidth: 256 bits</para>
        </listitem>
        <listitem><para>AS500 memory:</para>
  	  <itemizedlist>
  	    <listitem>
  	      <para>industry standard 72 bit wide buffered DIMMs</para>
              </listitem>
              <listitem>
                <para>8 DIMM slots</para>
              </listitem>
              <listitem>
  	      <para>installed in sets of 4</para>
              </listitem>
              <listitem>
  	      <para>maximum memory is 1 GB (512 Mb max on 333 MHz CPUs)</para>
              </listitem>
              <listitem>
  	      <para>uses ECC </para>
              </listitem>
  	  </itemizedlist>
	  </listitem>
         <listitem><para>AS600 memory:</para>
  	  <itemizedlist>
  	    <listitem>
    	      <para>industry standard 36 bit Fast Page Mode SIMMs</para>
              </listitem>
              <listitem>
                <para>32 SIMM slots</para>
              </listitem>
              <listitem>
                <para>installed in sets of 8</para>
              </listitem>
              <listitem>
  	      <para>maximum memory is 1 GB</para>
              </listitem>
              <listitem>
  	      <para>uses ECC</para>
              </listitem>
  	  </itemizedlist>
        </listitem>
        <listitem>
          <para>Qlogic 1020 based wide SCSI bus (1 bus/chip for AS500, 
  	2 buses/chip for AS600)</para>
        </listitem>
        <listitem>
          <para>21040 based 10 Mbit Ethernet adapter, both Thinwire 
  	and UTP connectors</para>
        </listitem>
        <listitem>
          <para>expansion:</para>
	    <itemizedlist>
	      <listitem>
		<para>AS500:</para>
		<itemizedlist>
		  <listitem>
		    <para>3 32-bit PCI slots</para>
		  </listitem>
		  <listitem>
  	     	    <para>1 64-bit PCI slot</para>
		  </listitem>
		</itemizedlist>
	      </listitem>
	      <listitem>
		<para>AS600:</para>
		<itemizedlist>
		  <listitem>
		    <para>2 32-bit PCI slot</para>
		  </listitem>
		  <listitem>
		    <para>3 64-bit PCI slots</para>
		  </listitem>
		  <listitem>
  		    <para>1 PCI/EISA physically shared slot</para>
		  </listitem>
		  <listitem>
  		    <para>3 EISA slots</para>
		  </listitem>
		  <listitem>
  		    <para>1 PCI and 1 EISA slot are occupied by default</para>
		  </listitem>
		</itemizedlist>
	      </listitem>
	    </itemizedlist>
        </listitem>
        <listitem>
          <para>21050 PCI-to-PCI bridge chip</para>
        </listitem>
        <listitem>
          <para>Intel 82375EB PCI-EISA bridge (AS600 only)</para>
        </listitem>
        <listitem>
          <para>2 16550A serial ports</para>
        </listitem>
        <listitem>
          <para>1 parallel port</para>
        </listitem>
        <listitem>
          <para>16 bit audio Windows Sound System, in a dedicated slot (AS500)
          in EISA slot (AS600, this is an ISA card)</para>
        </listitem>
        <listitem>
          <para>PS/2 keyboard and mouse port</para>
        </listitem>
      </itemizedlist>
  
      <para>Early machines had Fast SCSI interfaces, later ones are Ultra 
      SCSI capable. AS500 shares its single SCSI bus with internal and external 
      devices. For a Fast SCSI bus you are limited to 1.8 meters bus 
      length external to the box. The AS500 Qlogic ISP1020A chip can be set
      to run in Ultra mode by setting a SRM variable. &os; however follows
      the Qlogic chip errata and limits the bus speed to Fast.</para>

      <para>Beware of ancient SRM versions on AS500. When you see weird
      SCSI speeds being reported by &os; like</para>

      <programlisting>cd0 at isp0 bus 0 target 4 lun 0
cd0: &lt;DEC RRD45   DEC 0436&gt; Removable CD-ROM SCSI-2 device
cd0: 250.000MB/s transfers (250.000MHz, offset 12)</programlisting>

      <para> it is time to do a SRM console firmware upgrade.</para>
  
      <para>AS600 has one Qlogic SCSI chip dedicated to the internal devices 
      whereas the other Qlogic SCSI chip is dedicated to external SCSI devices.
      </para>
  
      <para>In AS500 DIMMs are installed in sets of 4, in <quote>physically 
      interleaved</quote> layout. So, a bank of 4 DIMMs is <emphasis>not</emphasis>
      4 physically adjacent DIMMs.</para>
  
      <para>In AS600 the memory SIMMs are placed onto two memory daughter 
      cards. SIMMs are installed in sets of 8. Both memory daughter cards must 
      be populated identically.</para>
  
      <para>Note that both AS500 and AS600 are EISA machines. This means
      you have to run the EISA Configuration Utility (ECU) from floppy
      after adding EISA cards or to change things like the configuration
      settings of the onboard I/O. For AS500 which does not have a physical
      EISA slot the ECU is used to configure the onboard sound interface
      etc.</para>

      <para>AS500 onboard sound can be used by adding a line like</para>

      <programlisting>device pcm</programlisting> 

      <para>to the kernel configuration file.</para>

      <para>Using the ECU I configured my AS500 to use IRQ 10, port 0x530,
      drq 0. Corresponding entries along with flags 0x10011 must go into
      the <filename>device.hints</filename> file. Note that the flags value is rather non-standard.
      </para>

      <para>AS600 has a peculiarity for its PCI slots. AS600 (or rather the 
      PCI expansion card containing the SCSI adapters) does not allow I/O port 
      mapping, therefore all devices behind it must use memory mapping. If you 
      have problems getting the Qlogic SCSI adapters to work, add the following 
      option to <filename>/boot/loader.rc</filename>:</para>
  
      <programlisting>set isp_mem_map=0xff</programlisting>
          
      <para>This may need to be typed at the boot loader prompt before booting the
      installation kernel.</para>
  
      <para>For the AlphaStation-[56]00 machines the kernel config file 
      must contain:</para>
      <programlisting>options	DEC_KN20AA 
cpu	EV5</programlisting>

    </sect3>

    <sect3>
      <title>AlphaServer 1000 (<quote>Mikasa</quote>), 
      1000A (<quote>Noritake</quote>) and 800(<quote>Corelle</quote>)</title>

      <para>The AlphaServer 1000 and 800 range of machines are intended as 
      departmental servers. They come in quite some variations in packaging 
      and mainboard/cpu. Generally speaking there are 21064 (EV4) CPU based 
      machines and 21164 (EV5) based ones. The CPU is on a daughter card, and 
      the type of CPU (EV4 or EV5) must match the mainboard in use.</para>

      <para>AlphaServer 800 has a much smaller mini tower case, it lacks the 
      StorageWorks SCSI hot-plug chassis. The main difference between AS1000 
      and AS1000A is that AS1000A has 7 PCI slots whereas AS1000 only has 3 
      PCI slots and has EISA slots instead.</para>

      <para>AS800 with an EV5/400 MHz CPU was later re-branded to become a 
      <quote>DIGITAL Server 3300[R]</quote>, AS800 with an EV5/500 MHz 
      CPU was later re-branded to become a 
      <quote>DIGITAL Server 3305[R]</quote>.</para>

      <para>Features:</para>
      <itemizedlist>
       <listitem>
        <para>21064 EV4[5] CPU at 200, 233 or 266 MHz
        21164 EV5[6] CPU at 300, 333 or 400 MHz (or 500 MHz for 
	AS800 only)</para>
       </listitem>
       <listitem>
         <para>memory:</para><itemizedlist>
	  <listitem>
	    <para>buswidth: 128 bit with ECC</para>
          </listitem>
          <listitem><para>AS1000[A]:</para>
	    <itemizedlist>
	      <listitem>
		<para>72pin 36 bit Fast Page Mode SIMMs, 70ns or better</para>
	      </listitem>
	      <listitem>
		<para>16 (EV5 machines) or 20 (EV4 machines) SIMM slots</para>
	      </listitem>
	      <listitem>
		<para>max memory is 1 GB</para>
	      </listitem>
	      <listitem>
		<para>uses ECC</para>
	      </listitem>
	    </itemizedlist>
          </listitem>
	  <listitem>
	   <para>AS800: Uses 60ns 3.3 Volts EDO DIMMs</para>
	  </listitem>
         </itemizedlist>
       </listitem>
       <listitem>
        <para>embedded VGA (on some mainboard models)</para>
       </listitem>
       <listitem>
        <para>3 PCI, 2 EISA, 1 64-bit PCI/EISA combo (AS800)</para>
       </listitem>
       <listitem>
        <para>7 PCI, 2 EISA (AS1000A)</para>
       </listitem>
       <listitem>
        <para>2 PCI, 1 EISA/PCI, 7 EISA (AS1000)</para>
       </listitem>
       <listitem>
        <para>embedded SCSI based on Symbios 810 [AS1000] or 
        Qlogic 1020 [AS1000A]</para>
       </listitem>
      </itemizedlist>

      <para>AS1000 based machines come in multiple enclosure types. Floor 
      standing, rack-mount, with or without StorageWorks SCSI chassis etc. 
      The electronics are the same.</para>

      <para>AS1000-systems: All EV4 based machines use standard PS/2 style 
      36 bit 72pin SIMMs in sets of 5. The fifth SIMM is used for ECC.
      All EV5 based machines use standard PS/2 style 36 bit 72pin SIMMs in sets 
      of 4. The ECC is done based on the 4 extra bits per SIMM 
      (4 bits out of 36). The EV5 mainboards have 16 SIMM slots, 
      the EV4 mainboards have 20 slots.</para>

      <para> AS800 machines use DIMMs in sets of 4. DIMM installation must 
      start in slots marked bank 0. A bank is four physically adjacent slots. 
      The biggest size DIMMs must be installed in bank 0 in case 2 banks 
      of different DIMM sizes are used. Max memory size is 2GB. Note 
      that these are EDO DIMMs.</para>

      <para>The AS1000/800 are somewhat stubborn when it comes to serial
      consoles. They need</para>
      <screen>&gt;&gt;&gt; <userinput>SET CONSOLE SERIAL</userinput></screen>
      <para>before they go for
      a serial console. Pulling the keyboard from the machine is not sufficient,
      like it is on most other Alpha models. Going back to a graphical console
      needs</para>
      <screen>&gt;&gt;&gt; <userinput>SET CONSOLE GRAPHICS</userinput></screen>
      <para>at the serial console.</para>

      <para>For AS800 you want to check if your Ultra-Wide SCSI is indeed 
      in Ultra mode. This can be done using the 
      <filename>EEROMCFG.EXE</filename> utility that is 
      on the Console Firmware Upgrade CDROM.</para>
 
      <para>For the AlphaServer1000/1000A/800 machines the kernel config 
      file must contain:</para>

      <programlisting>options	DEC_1000A
cpu	EV4		# depends on the CPU model installed
cpu	EV5		# depends on the CPU model installed</programlisting>

    </sect3>

    <sect3>
      <title>DS10/VS10/XP900 (<quote>Webbrick</quote>) / XP1000 
      (<quote>Monet</quote>) / DS10L (<quote>Slate</quote>)</title>

      <para>Webbrick and Monet are high performance workstations/servers 
      based on the EV6 CPU and the Tsunami chipset. Tsunami is also used in 
      much higher-end systems and as such has plenty of performance to offer. 
      DS10, VS10 and XP900 are different names for essentially the same system. 
      The differences are the software and options that are supported. DS10L 
      is a DS10 based machine in a 1U high rackmount enclosure. DS10L is 
      intended for ISPs and for HPTC clusters (e.g. Beowulf)</para>

      <sect4>
        <title><quote>Webbrick / Slate</quote></title>

        <itemizedlist>
	  <listitem>
	    <para>21264 EV6 CPU at 466 MHz</para>
	  </listitem>
	  <listitem>
	    <para>L2 / Bcache: 2MB, ECC protected</para>
	  </listitem>
	  <listitem>
	    <para>memory bus: 128 bit via crossbar, 1.3GB/sec memory
	    bandwidth</para>
	  </listitem>
	  <listitem>
	    <para>memory:</para>
	      <itemizedlist>
		<listitem>
		  <para>industry standard 200 pin 83 MHz buffered 
		  ECC SDRAM DIMMs</para>
		</listitem>
		<listitem>
	          <para>4 DIMM slots for DS10; 2GB max memory</para>
		</listitem>
		<listitem>
		  <para>2 DIMM slots for DS10L; 1GB max memory</para>
		</listitem>
		<listitem>
		  <para>DIMMs are installed in pairs of 2</para>
		</listitem>
	      </itemizedlist>
	  </listitem>
	  <listitem>
	    <para>21271 Core Logic chipset (<quote>Tsunami</quote>)</para>
	  </listitem>
	  <listitem>
	    <para>2 on-board 21143 Fast Ethernet controllers</para>
	  </listitem>
          <listitem>
	    <para>AcerLabs M5237 (Aladdin-V) USB controller (disabled)</para>
	  </listitem>
	  <listitem>
            <para>AcerLabs M1533 PCI-ISA bridge</para>
	  </listitem>
	  <listitem>
            <para>AcerLabs Aladdin ATA-33 controller </para>
	  </listitem>
	  <listitem>
            <para>embedded dual EIDE </para>
	  </listitem>
	  <listitem>
            <para>expansion: 3 64-bit PCI slots and 1 32-bit PCI slot. 
	     DS10L has a single 64bit PCI slot</para>
	  </listitem>
	  <listitem>
             <para>2 16550A serial ports</para>
	  </listitem>
	  <listitem>
            <para>1 parallel port</para>
	  </listitem>
	  <listitem>
            <para>2 USB</para>
	  </listitem>
	  <listitem>
            <para>PS/2 keyboard & mouse port</para>
	  </listitem>
	</itemizedlist>

      <para>The system has a smart power controller. This means that parts 
      of the system remain powered when it is switched off (like an ATX-style 
      PC power supply). Before servicing the machine remove the 
      power cord.</para>

      <para>The smart power controller is called the RMC. When enabled, 
      typing <keycap>Escape</keycap><keycap>Escape</keycap>RMC on serial port 1
      will bring you to the RMC prompt. RMC allows you to powerup or powerdown,
      reset the machine, monitor and set temperature trip levels etc. RMC
      has its own builtin help.</para>

      <para>Webbrick is shipped in a desktop-style case similar to the older 
      21164 <quote>Maverick</quote> workstations but this case 
      offers much better access 
      to the components. If you intend to build a farm you can rackmount them 
      in a 19-inch rack; they are 3U high. Slate is 1U high but has only 
      one PCI slot.</para>

      <para>DS10 has 4 DIMM slots. DIMMs are installed as pairs. Please note 
      that DIMM pairs are not installed in adjacent DIMM sockets but rather 
      physically interleaved. DIMM sizes of 32, 64, 128, 256 and 512 Mbytes 
      are supported.</para>

      <para>When 2 pairs of identical-sized DIMMs are installed DS10 will 
      use memory interleaving for increased performance. DS10L, which has 
      only 2 DIMM slots cannot do interleaving.</para>

      <para>Starting with SRM firmware version 5.9 you can boot from 
      Adaptec 2940-series adapters in addition to the usual set of Qlogic 
      and Symbios/NCR adapters.</para>

      <para>The base model comes with a FUJITSU 9.5GB ATA disk as its boot 
      device. &os; works just fine using EIDE disks on Webbrick. DS10 has 
      2 IDE interfaces on the mainboard. Machines destined for Tru64 Unix or 
      VMS are standard equipped with Qlogic-driven Ultra-SCSI disks</para>

      <para>On the PCI bus 32 and 64 bit cards are supported, in 3.3V and 
      5V variants.</para>

      <para>The USB ports are not supported and are disabled by the 
      SRM console in all recent SRM versions.</para>

      <para>The kernel config file must contain:</para>
      <programlisting>options	DEC_ST6600    
cpu	EV5</programlisting>

      <note><para>Contrary to expectation there is no <literal>cpu EV6</literal>
      defined for inclusion in the kernel config file. 
      The <literal>cpu EV5</literal> is mandatory to keep &man.config.8; 
      happy.</para></note>
    </sect4>

    <sect4>
      <title><quote>Monet</quote></title>

      <itemizedlist>
	<listitem>
          <para>21264 EV6 at 500 MHz
            21264 EV67 at 500 or 667 MHz (XP1000G, codenamed Brisbane)
            CPU is mounted on a daughter-card which is field-upgradable</para>
	</listitem>
	<listitem>
          <para>L2 / Bcache: 4MB, ECC protected</para>
	</listitem>
	<listitem>
          <para>memory bus: 256 bit</para>
	</listitem>
	<listitem>
          <para>memory: 128 or 256 Mbytes 100 MHz (PC100) 168 pin 
	  JEDEC standard, registered ECC SDRAM DIMMs</para>
	</listitem>
	<listitem>
          <para>21271 Core Logic chip-set (<quote>Tsunami</quote>)</para>
	</listitem>
	<listitem>
          <para>1 on-board 21143 Ethernet controller</para>
	</listitem>
	<listitem>
          <para>Cypress 82C693 USB controller</para>
	</listitem>
	<listitem>
          <para>Cypress 82C693 PCI-ISA bridge</para>
	</listitem>
	<listitem>
          <para>Cypress 82C693 controller</para>
	</listitem>
	<listitem>
          <para>expansion: 2 independent PCI buses, driven by high-speed I/O
 	     channels called <quote>hoses</quote>:</para>
	     <itemizedlist>
	       <listitem>
		 <para>hose 0: (the upper 3 slots)
                   2 64-bit PCI slots    
                   1 32-bit PCI slot     
		 </para>
	       </listitem>
	       <listitem>
		 <para>hose 1: (the bottom 2 slots)
                   2 32-bit PCI slots (behind a 21154 PCI-PCI bridge)
		 </para>
	       </listitem>
	       <listitem>
		 <para>2 of the 64-bit PCI slots are for 
		 full-length cards</para>
               </listitem>
	       <listitem>
	         <para>all of the 32-bit PCI slots are for short cards</para>
               </listitem>
	       <listitem>
	         <para>1 of the 32-bit PCI slots is physically shared 
		 with an ISA slot</para>
               </listitem>
	       <listitem>
   	         <para>all PCI slots run at 33MHz</para>
	       </listitem>
	     </itemizedlist>
	</listitem>
	<listitem>
          <para>1 Ultra-Wide SCSI port based on a Qlogic 1040 chip</para>
	</listitem>
	<listitem>
          <para>2 16550A serial port</para>
	</listitem>
	<listitem>
          <para>1 parallel port</para>
	</listitem>
	<listitem>
          <para>PS/2 keyboard & mouse port</para>
	</listitem>
	<listitem>
          <para>embedded 16-bit ESS ES1888 sound chip</para>
	</listitem>
	<listitem>
          <para>2 USB ports</para>
	</listitem>
	<listitem>
          <para>graphics options: ELSA Gloria Synergy or 
	  DEC/Compaq PowerStorm 3D accelerator cards</para>
        </listitem>
      </itemizedlist>

      <para>Monet is housed in a mini-tower like enclosure quite similar 
      to the Miata box.</para>

      <para>The on-board Qlogic UW-SCSI chip supports up to 4 internal 
      devices. There is no external connector for the on-board SCSI.</para>

      <para>For 500 MHz CPUs 83 MHz DIMMs will do. Compaq specifies PC100 
      DIMMs for all CPU speeds. DIMMs are installed in sets of 4, starting 
      with the DIMM slots marked <quote>0</quote> Memory capacity is max 4 GB. 
      DIMMs are installed <quote>physically interleaved</quote>, note the 
      markings of the
      slots. Memory bandwidth of Monet is twice that of Webbrick. The DIMMs 
      live on the CPU daughter-card. Note that the system uses ECC RAM so you 
      need DIMMs with 72 bits (not the generic PC-class 64 bit DIMMs)</para>

      <para>The EIDE interface is usable / SRM bootable so &os; can be rooted 
      on an EIDE disk. Although the Cypress chip has potential for 2 
      EIDE channels Monet uses only one of them.</para>

      <para>The USB interface is supported by &os;.If you experience 
      problems trying to use the USB interface please check if
      the SRM variable <varname>usb_enable</varname> is set to
      <literal>on</literal>. You can change this by
      performing:</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET USB_ENABLE ON</userinput></screen>

      <important><para>Don&quot;t try to use Symbios-chip based SCSI 
      adapters in the PCI slots connected to hose 1. There is a 
      not-yet-found &os; bug that prevents this from working 
      correctly.</para></important>

      <important><para>Not all VGA cards will work behind the PCI-PCI 
      bridge (so in slots 4 and 5). Only cards that implement 
      VGA-legacy addressing 
      correctly will work. Workaround is to put the VGA card 
      <quote>before</quote> the bridge.</para></important>

      <para>The sound chip is not currently supported with &os;. </para>
  
      <para>The kernel config file must contain:</para>
      <programlisting>options	DEC_ST6600    
cpu	EV5</programlisting>

      <note><para>Contrary to expectation there is no 
      <literal>cpu EV6</literal> defined for inclusion in the kernel 
      config file. The <literal>cpu EV5</literal> is mandatory to 
      keep &man.config.8; happy.</para></note>

     </sect4>
    </sect3>

    <sect3>
      <title>DS20/DS20E (<quote>Goldrush</quote>)</title>

      <para>Features:</para>
        <itemizedlist>
	  <listitem>
	    <para>21264 EV6 CPU at 500 or 670 MHz</para>
	  </listitem>
	  <listitem>
	    <para>dual CPU capable machine</para>
	  </listitem>
	  <listitem>
	    <para>L2 / Bcache: 4 Mbytes per CPU</para>
	  </listitem>
	  <listitem>
	    <para>memory bus: dual 256 bit wide with crossbar switch</para>
	  </listitem>
	  <listitem>
	    <para>memory:</para>
	      <itemizedlist>
		<listitem>
		  <para>SDRAM DIMMs</para>
		</listitem>
		<listitem>
		  <para>installed in sets of 4</para>
		</listitem>
		<listitem>
		  <para>16 DIMM slots, max. 4GB</para>
		</listitem>
		<listitem>
		  <para>uses ECC</para>
		</listitem>
	      </itemizedlist>
	  </listitem>
	  <listitem>
	    <para>21271 Core Logic chip-set
	    (<quote>Tsunami</quote>)</para>
	  </listitem>
	  <listitem>
	    <para>embedded Adaptec ? Wide Ultra SCSI</para>
	  </listitem>
	  <listitem>
	    <para>expansion:</para>
	      <itemizedlist>
		<listitem>
		  <para>2 independent PCI buses, driven 
		  by high-speed I/O channels called <quote>hoses</quote></para>
		</listitem>
		<listitem>
		  <para>6 64-bit PCI slots, 3 per hose</para>
		</listitem>
		<listitem>
                  <para>1 ISA slot</para>
		</listitem>
	      </itemizedlist>
	  </listitem>
	</itemizedlist>

      <para>DS20 needs</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET CONSOLE SERIAL</userinput></screen>
      <para>before it goes for a serial console.  Pulling the keyboard from
      the machine is not sufficient. Going back to a graphical console
      needs</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET CONSOLE GRAPHICS</userinput></screen>
      <para>at the serial console.  
      Confusing is the fact that you will get SRM console
      output on the graphics console with the console set to serial,
      but when &os; boots it honors the <literal>CONSOLE</literal>
      variable setting and all the boot messages as well as the login
      prompt will go to the serial port.</para>

      <para>The DS20 is housed in a fat cube-like enclosure. The
      enclosure also contains a StorageWorks SCSI hot-swap shelf for a
      maximum of seven 3.5&quot; SCSI devices.  The DS20E is in a sleeker
      case, and lacks the StorageWorks shelf.</para>

      <para>The system has a smart power controller. This means that parts
      of the system remain powered when it is switched off (like an ATX-style
      PC power supply). Before servicing the machine remove the
      power cord(s).</para>
    
      <para>The smart power controller is called the RMC. When enabled,
      typing <keycap>Escape</keycap><keycap>Escape</keycap>RMC on serial port 1
      will bring you to the RMC prompt. RMC allows you to powerup or powerdown,
      reset the machine, monitor and set temperature trip levels etc. RMC
      has its own builtin help.</para>

      <para>The embedded Adaptec SCSI chip on the DS20 is disabled and
      is therefore not usable under &os;.</para>

      <para>Starting with SRM firmware version 5.9 you can boot from
      Adaptec 2940-series adapters in addition to the usual set of
      Qlogic and Symbios/NCR adapters.  This unfortunately does not
      include the embedded Adaptec SCSI chips.</para>

      <para>If you are using banks of DIMMs of different sizes the
      biggest DIMMs should be installed in the DIMM slots marked
      <literal>0</literal> on the mainboard. The DIMM slots should be
      filled <quote>in order</quote> so after bank 0 install in bank 1
      and so on.</para>

      <para>Don't try to use Symbios-chip based SCSI adapters in the
      PCI slots connected to hose 1. There is a not-yet-found &os; bug
      that prevents this from working correctly. DS20 ships by default
      with a Symbios on hose 1 so you have to move this card before
      you can install/boot &os; on it.</para>

      <para>The kernel config file must contain:</para>
      <programlisting>options	DEC_ST6600    
cpu	EV5</programlisting>

      <note><para>Contrary to expectation there is no <literal>cpu EV6</literal>
      defined for inclusion in the kernel config file. 
      The <literal>cpu EV5</literal> is mandatory to keep &man.config.8; 
      happy.</para></note>
    </sect3>

    <sect3>
      <title>AlphaPC 264DP / UP2000</title>

      <para>UP2000 is built by Alpha Processor Inc.</para>

      <para>Features:</para>
        <itemizedlist>
	  <listitem>
	    <para>21264 EV6 CPU at 670 MHz</para>
	  </listitem>
	  <listitem>
	    <para>dual CPU capable</para>
	  </listitem>
	  <listitem>
	    <para>L2 / Bcache: 4 Mbytes per CPU</para>
	  </listitem>
	  <listitem>
	    <para>memory bus: 256 bit</para>
	  </listitem>
	  <listitem>
	    <para>memory: SDRAM DIMMs installed in sets of 4, uses
	    ECC, 16 DIMM slots, max. 4GB</para>
	  </listitem>
	  <listitem>
	    <para>21272 Core Logic chip-set (<quote>Tsunami</quote>)</para>
	  </listitem>
	  <listitem>
	    <para>embedded Adaptec AIC7890/91 Wide Ultra SCSI</para>
	  </listitem>
	  <listitem>
	    <para>2 embedded IDE based on Cypress 82C693 chips</para>
	  </listitem>
	  <listitem>
	    <para>embedded USB via Cypress 82C693</para>
	  </listitem>
	  <listitem>
	    <para>expansion:</para>
	      <itemizedlist>
		<listitem>
		  <para>2 independent PCI buses, driven 
		  by high-speed I/O channels called <quote>hoses</quote></para>
		</listitem>
		<listitem>
		  <para>6 64-bit PCI slots, 3 per hose</para>
		</listitem>
		<listitem>
                  <para>1 ISA slot</para>
		</listitem>
	      </itemizedlist>
	  </listitem>
	</itemizedlist>

      <para>Currently a maximum of 2GB memory is supported by &os;.</para>

      <para>The on-board Adaptec is not bootable but works with &os;
      4.0 and later as a datadisk-only SCSI bus.</para>

      <para>Busmaster DMA is supported on the first IDE interface
      only.</para>

      <para>The kernel config file must contain:</para>
      <programlisting>options	DEC_ST6600    
cpu	EV5</programlisting>

      <note><para>Contrary to expectation there is no <literal>cpu
      EV6</literal> defined for inclusion in the kernel config
      file. The <literal>cpu EV5</literal> is mandatory to keep
      &man.config.8; happy.</para></note>
    </sect3>

    <sect3>
      <title>AlphaServer 2000 (<quote>DemiSable</quote>), 2100
      (<quote>Sable</quote>), 2100A (<quote>Lynx</quote>)</title>

      <para>The AlphaServer 2[01]00 machines are intended as departmental 
      servers. This is medium iron. They are multi-CPU machines, up to 2 
      CPUs (AS2000) or 4 CPUs (2100[A]) can be installed. Both floor-standing 
      and 19&quot; rackmount boxes exist. Rackmount variations have
      different numbers of I/O expansion slots, different max number 
      of CPUs and different maximum memory size. Some of the boxes come 
      with an integral StorageWorks shelf to house hot-swap SCSI disks. 
      There was an upgrade program available to convert your Sable 
      machine into a Lynx by swapping the I/O backplane (the C-bus 
      backplane remains). CPU upgrades were available as well.</para>

      <itemizedlist>
        <listitem>
	  <para>21064 EV4[5] CPU[s] at 200, 233, 275 MHz or
          21164 EV5[6] CPU[s]s at 250, 300, 375, 400 MHz</para>
	</listitem>
	<listitem>
          <para>cache: varies in size with the CPU model; 1, 4 or 
	  8Mbyte per CPU</para>
	</listitem>
	<listitem>
          <para>embedded floppy controller driving a 2.88 Mbytes drive</para>
	</listitem>
	<listitem>
          <para>embedded 10Mbit 21040 Ethernet [AS2100 only]</para>
	</listitem>
	<listitem>
          <para>2 serial ports</para>
	</listitem>
	<listitem>
          <para>1 parallel port</para>
	</listitem>
	<listitem>
          <para>PS/2 style keyboard & mouse port</para>
	</listitem>
      </itemizedlist>

      <para>The CPUs spec-ed as 200 MHz are in reality running at 
      190 MHz. Maximum number of CPUs is 4. All CPUs must be of the 
      same type/speed.</para>

      <para>If any of the processors are ever marked as failed, they will
      remain marked as failed even after they have been replaced (or reseated) 
      until you issue the command</para>

      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>CLEAR_ERROR ALL</userinput></screen>

      <para>on the SRM console and power-cycle the machine.  This may be true 
      for other modules (IO and memory) as well, but it has not been verified.
      </para>

      <para>The machines use dedicated memory boards. These boards live on 
      a 128 bit C-bus shared with the CPU boards. DemiSable supports up 
      to 1GB, Sable up to 2GB. One of the memory bus slots can either 
      hold a CPU or a memory card. A 4 CPU machine can have a maximum of 
      2 memory boards.</para>

      <para>Some memory board models house SIMMs. These are called SIMM 
      carriers. There are also memory modules that have soldered-on memory 
      chips instead of SIMMs. These are called <quote>flat memory 
      modules</quote>.</para>

      <para>SIMM boards are used in sets of eight 72-pin 36 bit FPM 
      memory of 70ns or faster. SIMM types supported are 1Mb x36 bit 
      (4 Mbyte) and 4Mb x36 bit (16 Mbyte). Each memory board can house 
      4 banks of SIMMs. SIMM sizes can not be mixed on a single memory 
      board. The first memory module must be filled with SIMMs before 
      starting to fill the next memory module. Note that the spacing 
      between the slots is not that big, so make sure your SIMMs fit 
      physically (before buying them..)</para>

      <para>Both Lynx and Sable are somewhat stubborn when it comes to serial
      consoles. They need</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput> SET CONSOLE SERIAL</userinput></screen>
      <para>before they go for a serial console. 
      Pulling the keyboard from the machine is not sufficient, like it is 
      on many other Alpha models. Going back to a graphical console needs</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET CONSOLE GRAPHICS</userinput></screen>
      <para>at the serial console. On Lynx keep the VGA card in 
      one of the primary PCI slots. EISA VGA cards are not slot sensitive.
      </para>

      <para>The machines are equipped with a small OCP 
      (Operator Control Panel) LCD screen. On this screen the self-test 
      messages are displayed during system initialization. You can put 
      your own little text there by using the SRM:</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET OCP_TEXT "FreeBSD"
      </userinput></screen>

      <para>The SRM</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SHOW FRU</userinput></screen>
      <para>command produces an overview of your configuration
      with module serial numbers, hardware revisions and error log counts.
      </para>

      <para>Both Sable, DemiSable and Lynx have Symbios 810 based 
      Fast SCSI on-board. Check if it is set to Fast SCSI speed 
      by</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SHOW PKA0_FAST</userinput></screen>
      <para>When set to 1 it is negotiating for Fast speeds.</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>SET PKA0_FAST 1</userinput></screen>
      <para>enables Fast SCSI speeds.</para>

      <para>AS2100[A] come equipped with a StorageWorks 7 slot SCSI 
      cage. A second cage can be added inside the cabinet. AS2000 
      has a single 7 slot SCSI cage, which cannot be expanded with 
      an additional one. Note that the slot locations in these cages 
      map differently to SCSI IDs compared to the standard StorageWorks 
      shelves. Slot IDs from top to bottom are 0, 4, 1, 5, 2, 6, 3 
      when using a single bus configuration.</para>

      <para>The cage can also be set to provide two independent SCSI 
      buses. This is used for embedded RAID controllers like the 
      KZPSC (Mylex DAC960). Slot ID assignments for split bus are, 
      from top to bottom: 0A, 0B, 1A, 1B, 2A, 2B, 3A, 3B. 
      Where A and B signify a SCSI bus. In a single bus configuration the 
      terminator module on the back of the SCSI cage is on the TOP. The jumper
      module is on the BOTTOM. For split bus operation these two modules are
      reversed. The terminator can be distinguished from the jumper 
      by noting the chips on the terminator. The jumper does not have 
      any active components on it.</para>

      <para>DemiSable has 7 EISA slots and 3 PCI slots. Sable has 
      8 EISA and 3 PCI slots. Lynx, being newer, has 8 PCI 
      and 3 EISA slots. The Lynx PCI slots are grouped in 
      sets of 4. The 4 PCI slots closest to the CPU/memory
      slots are the primary slots, so logically before the PCI bridge chip.
      Note that contrary to expectation the primary PCI slots are the highest
      numbered ones (PCI4 - PCI7).</para>

      <para>Make sure you run the EISA Configuration Utility (from floppy) 
      when adding/change expansion cards in EISA slots or after 
      upgrading your console firmware. This is done by inserting the 
      ECU floppy and typing</para>
      <screen><prompt>&gt;&gt;&gt;</prompt> <userinput>RUNECU</userinput></screen>

      <note><para>EISA slots are currently unsupported, but the Compaq Qvision
      EISA VGA adapter is treated as an ISA device. It therefore
      works OK as a console.</para></note>

      <para>A special Extended I/O module for use on the C-bus was 
      planned-for. If they ever saw daylight is unknown. In any case 
      &os; has never been verified with an ExtIO module.</para>

      <para>The machines can be equipped with redundant power supplies. Note 
      that the enclosure is equipped with interlock switches that switch 
      off power when the enclosure is opened. The system's cooling 
      fans are speed controlled. When the machine has more than 2 
      CPUs and more than 1 memory board dual power supplies 
      are mandatory.</para>

      <para>The kernel config file must contain:</para>

      <programlisting>options	DEC_2100_A500
cpu	EV4	#dependent on CPU model installed
cpu	EV5	#dependent on CPU model installed</programlisting>

    </sect3>

    <sect3>
      <title>AlphaServer 4x00 (<quote>Rawhide</quote>)</title>

      <para>The AlphaServer 4x00 machines are intended as small enterprise
      servers. Expect a 30&quot; high pedestal cabinet or alternatively 
      the same system box in a 19&quot; rack. This is medium iron, not 
      a typical hobbyist system. Rawhides are multi-CPU machines, up to 
      4 CPUs can be in a single machine.  Basic disk storage is housed in 
      one or two StorageWorks shelves at the bottom of the pedestal. The 
      Rawhides intended for the NT market are designated DIGITAL 
      Server 7300 (5/400 CPU), DIGITAL Server 7305 (5/533 CPU). A 
      trailing R on the part-number means a rackmount variant.</para>

      <para>Features:</para>
        <itemizedlist>
	  <listitem>
	    <para>21164 EV5 CPUs at 266, 300 MHz or 21164A EV56 
	    CPUs at 400, 466, 533, 600 and 666 Mhz</para>
	  </listitem>
	  <listitem>
            <para>cache: 4 Mbytes per CPU. EV5 300 MHz was also 
	    available cache-less. 8 Mbytes for EV5 600Mhz</para>
	  </listitem>
	  <listitem>
	    <para>memory bus: 128 bit with ECC</para>
	  </listitem>
	  <listitem>
            <para>embedded floppy controller</para>
	  </listitem>
	  <listitem>
            <para>2 serial ports</para>
	  </listitem>
	  <listitem>
            <para>1 parallel port</para>
	  </listitem>
	  <listitem>
            <para>PS/2 style keyboard & mouse port</para>
	  </listitem>
        </itemizedlist>

     <para>Rawhide uses a maximum of 8 RAM modules. These modules are used 
     in pairs and supply 72 bits to the bus (this includes ECC bits). 
     Memory can be EDO RAM or synchronous DRAM. A fully populated Rawhide 
     has 4 pairs of memory modules. Given the choice use SDRAM for 
     best performance. The highest capacity memory board must be in 
     memory slot 0. A mix of memory board sizes is allowed. A mix 
     of EDO and SDRAM is also reported as working (assuming you don't 
     try to mix EDO and SDRAM in one module pair). A mix of EDO and SDRAM
     results in the <emphasis>entire</emphasis> memory subsystem running at
     the slower EDO timing</para>

     <para>Rawhide has an embedded Symbios 810 chip that gives you a
     narrow fast-SCSI bus. Generally only the SCSI CDROM is driven by
     this interface.</para>

     <para>Rawhides are available with a 8 64-bit PCI / 3 EISA 
     slot expansion backplanes (called <quote>Saddle</quote> modules). There 
     are 2 separate PCI buses, PCI0 and PCI1. PCI0 has 1 dedicated 
     PCI slot and (shared) 3 PCI/EISA slots. PCI0 also has a
     PCI/EISA bridge that drives things like the serial and 
     parallel ports, keyboard/mouse etc. PCI1 has 4 PCI slots 
     and a Symbios 810 SCSI chip. VGA console cards must be installed 
     in a slot connected to PCI0.</para>

     <para>The current &os; implementation has problems in handling 
     PCI bridges. There is currently a limited fix in place which allows 
     for single level, single device PCI bridges. The fix allows the use of
     the Digital supplied Qlogic SCSI card which sits behind 
     a 21054 PCI bridge chip.</para>

     <note><para>EISA slots are currently unsupported, but the Compaq Qvision
     EISA VGA adapter is treated as an ISA device. It therefore works 
     OK as a console.</para></note>

     <para>Rawhide employs an I2C based power controller system. If 
     you want to be sure all power is removed from the system remove the 
     mains cables from the system.</para>

     <para>The kernel config file must contain:</para>
<programlisting>options	DEC_KN300
cpu	EV5</programlisting>

    </sect3>

    <sect3>
      <title>AlphaServer 1200 (<quote>Tincup</quote>) and AlphaStation
      1200 (<quote>DaVinci</quote>)</title>

      <para>The AlphaServer 1200 machine is the successor to the 
      AlphaServer 1000A. It uses the same enclosure the 1000A uses, 
      but the logic is based on the AlphaServer 4000 design. These 
      are multi-CPU machines, up to 2 CPUs can be in a single machine.  
      Basic disk storage is housed in a StorageWorks shelves
      The AS1200 intended for the NT market were designated DIGITAL 
      Server 5300 (5/400 CPU) and DIGITAL Server 5305 (5/533 CPU).</para>

      <para>Features:</para>
	<itemizedlist>
	  <listitem>
	    <para>21164A EV56 CPUs at 400 or 533 Mhz</para>
	  </listitem>
	  <listitem>
            <para>cache: 4 Mbytes per CPU</para>
	  </listitem>
	  <listitem>
            <para>memory bus: 128 bit with ECC, DIMM memory on two 
	    memory daughter boards</para>
	  </listitem>
	  <listitem>
            <para>embedded floppy controller</para>
	  </listitem>
	  <listitem>
            <para>2 serial ports</para>
	  </listitem>
	  <listitem>
            <para>1 parallel port</para>
	  </listitem>
	  <listitem>
            <para>PS/2 style keyboard & mouse port</para>
	  </listitem>
        </itemizedlist>

      <para>AS1200 uses 2 memory daughter cards. On each of these cards 
      are 8 DIMM slots. DIMMs must be installed in pairs. The maximum 
      memory size is 4 GBytes. Slots must be filled in order and slot 
      0 must contain the largest size DIMM if different sized DIMMs are 
      used. AS1200 employs fixed starting addresses for DIMMs, each 
      DIMM pair starts at a 512 Mbyte boundary. This means that if 
      DIMMs smaller than 256 Mbyte are used the system's physical memory 
      map will contain <quote>holes</quote>. Supported DIMM sizes are 64 Mbytes 
      and 256 Mbytes. The DIMMs are 72 bit SDRAM based, as the 
      system employs ECC.</para>

      <note><para>&os; currently supports up to 2GBytes</para></note>

      <para>AS1200 has an embedded Symbios 810 drive Fast SCSI bus.</para>

      <para>Tincup has 5 64-bit PCI slots, one 1 32-bit PCI slot and one 
      EISA slot (which is physically shared with one of the 64-bit PCI slots).
      There are 2 separate PCI buses, PCI0 and PCI1. PCI0 has the 32-bit PCI 
      slot and the 2 top-most 64-bit PCI slots. PCI0 also has an Intel 82375EB
      PCI/EISA bridge that drives things like the serial and parallel ports, 
      keyboard/mouse etc. PCI1 has 4 64-bit PCI slots and a Symbios 810 
      SCSI chip. VGA console cards must be installed in a slot 
      connected to PCI0.</para>

      <para>The system employs an I2C based power controller system. 
      If you want to be sure all power is removed from the system remove
      the mains cables from the system. Tincup uses dual power supplies 
      in load-sharing mode and not as a redundancy pair.</para>

      <para>The kernel config file must contain:</para>
<programlisting>options	DEC_KN300
cpu	EV5</programlisting>
    </sect3>

    <sect3>
      <title>AlphaServer 8200 and 8400 (<quote>TurboLaser</quote>)</title>

      <para>The AlphaServer 8200 and 8400 machines are enterprise servers.
      Expect a tall 19&quot; cabinet (8200) or fat (8400) 19&quot; rack. 
      This is big iron, not a hobbyist system. TurboLasers are multi-CPU 
      machines, up to 12 CPUs can be in a single machine. The TurboLaser 
      System Bus (TLSB) allows 9 nodes on the AS8400 and 5 nodes on 
      the AS8200. TLSB is 256 bit data, 40 bit address allowing 2.1 
      GBytes/sec. Nodes on the TLSB can be CPUs, memory or I/O. A 
      maximum of 3 I/O ports are supported on a TLSB.</para>

      <para>Basic disk storage is housed in a StorageWorks shelf. 
      AS8400 uses 3 phase power, AS8200 uses single phase power.</para>

      <para>Features:</para>
	<itemizedlist>
	  <listitem>
	    <para>21164 EV5/EV56 CPUs at up to 467 MHz or 21264 EV67 CPUs at 
	    up to 625 MHz</para>
	  </listitem>
	  <listitem>
            <para>one or two CPUs per CPU module</para>
	  </listitem>
	  <listitem>
            <para>cache: 4Mbytes B-cache per CPU</para>
	  </listitem>
	  <listitem>
            <para>memory bus: 256 bit with ECC</para>
	  </listitem>
	  <listitem>
            <para>memory: big memory modules that plug into the TLSB, 
	    which in turn hold special SIMM modules. Memory modules come 
	    in varying sizes, up to 4 GBytes a piece. Uses ECC (8 bits 
	    per 64 bits of data) 7 memory modules max for AS8400, 
	    3 modules max for AS8200. Maximum memory is 28 GBytes.</para>
	  </listitem>
	  <listitem>
            <para>expansion: 3 system <quote>I/O ports</quote> that allow up to 
	    12 I/O channels each I/O channel can connect to 
	    XMI, Futurebus+ or PCI boxes</para>
	  </listitem>
	</itemizedlist>
       
      <para>&os; supports (and has been tested with) up to 2 GBytes 
      of memory on TurboLaser. There is a trade-off to be made between
      TLSB slots occupied by memory modules and TLSB slots occupied by
      CPU modules. For example you can have 28GBytes of memory but only
      2 CPUs (1 module) at the same time.</para>

      <para>Only PCI expansion is supported on &os;. XMI or 
      Futurebus+ (which are AS8400 only) are both unsupported.</para>

      <para>The I/O port modules are designated KFTIA or KFTHA. The 
      I/O port modules supply so called <quote>hoses</quote> that connect to 
      up to 4 (KFTHA) PCI buses or 1 PCI bus (KFTIA). KFTIA has 
      embedded dual 10baseT Ethernet, single FDDI, 3 SCSI Fast 
      Wide Differential SCSI buses and a single Fast Wide Single Ended
      SCSI bus. The FWSE SCSI is intended for the CDROM.</para>

      <para>KFTHA can drive via each of its 4 hoses a DWLPA or DWLPB 
      box. The DWLPx house a 12 slots 32 bit PCI backplane. Physically 
      the 12 slots are 3 4-slot buses but to the software it appears 
      as a single 12 slots PCI bus. A fully expanded AS8x00 can have 
      3 (I/O ports) times 4 (hoses) times 12 (PCI slots/DWLPx) = 
      144 PCI slots. The maximum bandwidth per KFTHA is 500
      Mbytes/second. DWLPA can also house 8 EISA cards, 2 slots 
      are PCI-only, 2 slots are EISA only. Of the 12 slots 2 
      are always occupied by an I/O and connector module. DWLPB are the
      prefered I/O boxes.</para>

      <para>For best performance distribute high bandwidth 
      (FibreChannel, Gigabit Ethernet) over multiple hoses and/or 
      multiple KFTHA/KFTIA.</para>

      <para>Currently PCI expansion cards containing PCI bridges are 
      not usable with &os;. Don't use them at this time.</para>

      <para>The single ended narrow SCSI bus on the KFTIA will turn up as 
      the <emphasis>fourth</emphasis> SCSI bus. The 3 fast-wide
      differential SCSI buses of the KFTIA precede it. </para>

      <para>AS8x00 are generally run with serial consoles. Some 
      newer machines might have a graphical console of some sorts 
      but &os; has only been tested on a serial console.</para>

      <para>For serial console usage either change 
      <filename>/etc/ttys</filename> to have:</para>

	<programlisting>console "/usr/libexec/getty std.9600"   unknown   on secure</programlisting>

      <para>as the console entry, or add</para>

        <programlisting>zs0     "/usr/libexec/getty std.9600"   unknown   on secure</programlisting>

      <para>For the AlphaServer 8x00 machines the kernel config file 
      must contain:</para>
        <programlisting>options	DEC_KN8AE	# Alpha 8200/8400 (Turbolaser)
cpu	EV5</programlisting>

      <para>Contrary to expectation there is no <literal>cpu
      EV6</literal> defined for inclusion in the kernel config
      file. The <literal>cpu EV5</literal> is mandatory to keep
      &man.config.8; happy.</para>
    </sect3>

    <sect3>
      <title>Alpha Processor Inc. UP1000</title>

      <para>The UP1000 is an ATX mainboard based on the 21264a 
      CPU which itself lives in a Slot B module. It is normally housed 
      in an ATX tower enclosure.</para>

      <para>Features:</para>
	<itemizedlist>
	  <listitem>
	    <para>21264a Alpha CPU at 600 or 700 MHz in a Slot B 
	    module (includes cooling fans)</para>
	  </listitem>
	  <listitem>
            <para>memory bus: 128 bits to the L2 cache, 
	    64 bits from Slot B to the AMD-751</para>
	  </listitem>
	  <listitem>
            <para>on-board Bcache / L2 cache: 2MB (600Mhz) or 
	    4MB (700Mhz)</para>
	  </listitem>
	  <listitem>
            <para>AMD AMD-751 (<quote>Irongate</quote>) 
	    system controller chip</para>
	  </listitem>
	  <listitem>
            <para>Acer Labs M1543C PCI-ISA bridge controller / 
	    super-IO chip</para>
	  </listitem>
	  <listitem>
            <para>PS/2 mouse & keyboard port</para>
	  </listitem>
	  <listitem>
            <para>memory: 168-pin PC100 unbuffered SDRAM DIMMS, 3 DIMM slots
	    DIMM sizes supported are 64, 128 or 256 Mb in size</para>
	  </listitem>
	  <listitem>
            <para>2 16550A serial port</para>
	  </listitem>
	  <listitem>
            <para>1 ECP/EPP parallel port</para>
	  </listitem>
	  <listitem>
            <para>floppy interface</para>
	  </listitem>
	  <listitem>
            <para>2 embedded Ultra DMA33 IDE interface</para>
	  </listitem>
	  <listitem>
            <para>2 USB ports</para>
	  </listitem>
	  <listitem>
            <para>expansion:</para>
	      <itemizedlist>
		<listitem>
		  <para>4 32 bit PCI slots</para>
		</listitem>
		<listitem>
                  <para>2 ISA slots</para>
		</listitem>
		<listitem>
	          <para>1 AGP slot</para>
		</listitem>
	       </itemizedlist>
          </listitem>
	</itemizedlist>

       <para>Slot B is a box-like enclosure that houses a 
       daughter-board for the CPU and cache. It has 2 small fans for 
       cooling. Loud fans..</para>

       <para>The machine needs ECC capable DIMMs, so 72 bit ones. 
       This does not appear to be documented in the UP1000 docs. The 
       system accesses the serial EEPROM on the DIMMs via the SM bus. 
       Note that if only a single DIMM is used it must be installed in 
       slot <emphasis>2</emphasis>. This is a bit counter-intuitive.</para>

       <para>The UP1000 needs a 400Watt ATX power supply according 
       to the manufacturer. This might be a bit overly 
       conservative/pessimistic judging from the power consumption of 
       the board & cpu. But as always you will have to take your
       expansion cards and peripherals into account. The M1543C chip 
       contains power management functionality & temperature monitoring 
       (via I2C / SM bus).</para>

       <para>Chances are that your UP1000 comes by default with 
       AlphaBios only. The SRM console firmware is available from 
       the Alpha Processor Inc. web site. It is currently available in 
       a beta version which was successfully used during the port of &os; 
       to the UP1000. </para>

       <para>The embedded Ultra DMA EIDE ports are bootable by the 
       SRM console.</para>

       <para>UP1000 SRM can boot off an Adaptec 294x adapter. Under high 
       I/O load conditions machine lockups have been observed using 
       the Adaptec 294x. A Symbios 875 based card works just fine, 
       using the sym driver. Most likely other cards based on the Symbios 
       chips that the sym driver supports will work as well.</para>

      <para>The USB interfaces are disabled by the SRM console and 
      have not (yet) been tested with &os;.</para>

      <para>For the UP1000 the kernel config file must contain:</para>
      <programlisting>options	API_UP1000	# UP1000, UP1100 (Nautilus)
cpu	EV5</programlisting>

    </sect3>

    <sect3>
      <title>Alpha Processor Inc. UP1100</title>

      <para>The UP1100 is an ATX mainboard based on the 21264a CPU running 
      at 600 MHz.  It is normally housed in an ATX tower enclosure.</para>

      <para>Features:</para>
	<itemizedlist>
	  <listitem>
            <para>21264a Alpha EV6 CPU at 600 or 700 MHz</para>
	  </listitem>
	  <listitem>
            <para>memory bus: 100MHz 64-bit (PC-100 SDRAM), 800 MB/s memory 
	    bandwidth</para>
	  </listitem>
	  <listitem>
            <para>on-board Bcache / L2 cache: 2Mb</para>
	  </listitem>
	  <listitem>
            <para>AMD AMD-751 (<quote>Irongate</quote>) system controller 
	    chip</para>
	  </listitem>
	  <listitem>
            <para>Acer Labs M1535D PCI-ISA bridge controller / 
	    super-IO chip</para>
	  </listitem>
	  <listitem>
            <para>PS/2 mouse & keyboard port</para>
	  </listitem>
	  <listitem>
            <para>memory: 168-pin PC100 unbuffered SDRAM DIMMS, 3 DIMM slots
            DIMM sizes supported are 64, 128 or 256 Mb in size</para>
	  </listitem>
	  <listitem>
            <para>2 16550A serial port</para>
	  </listitem>
	  <listitem>
            <para>1 ECP/EPP parallel port</para>
	  </listitem>
	  <listitem>
            <para>floppy interface</para>
	  </listitem>
	  <listitem>
            <para>2 embedded Ultra DMA66 IDE interface</para>
	  </listitem>
	  <listitem>
            <para>2 USB port</para>
	  </listitem>
	  <listitem>
             <para>expansion: 3 32 bit PCI slots and 1 AGP2x slot</para>
	  </listitem>
        </itemizedlist>

      <para>SRM console code comes standard with the UP1100. The SRM lives 
      in 2Mbytes of flash ROM.</para>

      <para>The machine needs ECC capable DIMMs, so 72 bit ones. 
      This does not appear to be documented in the UP1100 docs. The 
      system accesses the serial EEPROM on the DIMMs via the SM bus. 
      Note that if only a single DIMM is used it must be installed in 
      slot <emphasis>2</emphasis>. This is a bit counter-intuitive.</para>

      <para>The UP1100 needs a 400Watt ATX power supply according to 
      the manufacturer. This might be a bit overly conservative/pessimistic 
      judging from the power consumption of the board & cpu. But as 
      always you will have to take your expansion cards and 
      peripherals into account. The M1535D chip contains power
      management functionality & temperature monitoring 
      (via I2C / SM bus using a LM75 thermal sensor).</para>

      <para>The UP1100 has an on-board 21143 10/100Mbit Ethernet 
      interface.</para>

      <para>The UP1100 is equipped with a SoundBlaster compatible audio 
      interface. Whether it works with &os; is as of yet unknown.</para>

      <para>The embedded Ultra DMA EIDE ports are bootable by 
      the SRM console.</para>

      <para>The UP1100 has 3 USB ports, 2 going external and one connected 
      to the AGP port.</para>

      <para>For the UP1100 the kernel config file must contain:</para>
      <programlisting>options	API_UP1000	# UP1000, UP1100 (Nautilus)
cpu	EV5</programlisting>

      <para>Contrary to expectation there is no <literal>cpu
      EV6</literal> defined for inclusion in the kernel config
      file. The <literal>cpu EV5</literal> is mandatory to keep
      &man.config.8; happy.</para>

    </sect3>

    <sect3>
      <title>Alpha Processor Inc. CS20, Compaq DS20L</title>

      <para>The CS20 is a 19&quot;, 1U high rackmount server based 
      on the 21264[ab] CPU. It can have a maximum of 2 CPUs. Compaq
      sells the CS20 rebranded as the AlphaServer DS20L. DS20L has
      833MHz CPUs.</para>

      <para>Features:</para>
	<itemizedlist>
	  <listitem>
	    <para>21264a Alpha CPU at 667 MHz or 21264b 833 MHz 
	    (max. 2 CPUs)</para>
	  </listitem>
	  <listitem>
            <para>memory bus: 100MHz 256-bit wide</para>
	  </listitem>
	  <listitem>
            <para>21271 Core Logic chipset (<quote>Tsunami</quote>)</para>
	  </listitem>
	  <listitem>
            <para>Acer Labs M1533 PCI-ISA bridge controller / super-IO chip
	    </para>
	  </listitem>
	  <listitem>
            <para>PS/2 mouse & keyboard port</para>
	  </listitem>
	  <listitem>
            <para>memory: 168-pin PC100 PLL buffered/registered SDRAM DIMMS,
            8 DIMM slots, uses ECC memory, min 256 Mbytes / 
	    max 2 GBytes of memory</para>
	  </listitem>
	  <listitem>
            <para>2 16550A serial port</para>
	  </listitem>
	  <listitem>
            <para>1 ECP/EPP parallel port</para>
	  </listitem>
	  <listitem>
            <para>ALI M1543C Ultra DMA66 IDE interface</para>
	  </listitem>
	  <listitem>
            <para>embedded dual Intel 82559 10/100Mbit Ethernet</para>
	  </listitem>
	  <listitem>
            <para>embedded Symbios 53C1000 Ultra160 SCSI controller</para>
	  </listitem>
	  <listitem>
            <para>expansion: 2 64 bit PCI slots (2/3 length)</para>
	  </listitem>
	</itemizedlist>

      <para>SRM console code comes standard with the CS20. The SRM 
      lives in 2Mbytes of flash ROM.</para>

      <para>The CS20 needs ECC capable DIMMs. Note that it 
      uses <emphasis>buffered</emphasis> DIMMs.</para>

      <para>The CS20 has an I2C based internal monitoring system for things 
      like temperature, fans, voltages etc. The I2C also supports 
      <quote>wake on LAN</quote>.</para>

      <para>Each PCI slot is connected to its own independent PCI bus 
      on the Tsunami.</para>

      <para>The embedded Ultra DMA EIDE ports are bootable by the 
      SRM console.</para>

      <para>The CS20 has an embedded slim-line IDE CD drive. There is 
      a front-accessible bay for a 1&quot; high 3.5&quot; SCSI hard-disk 
      drive with SCA connector.</para>

      <para>Note that there is no floppy disk drive (or a connector to 
      add one).</para>

      <para>The kernel config file must contain:</para>
      <programlisting>options	DEC_ST6600
cpu	EV5</programlisting>

      <para>Contrary to expectation there is no <literal>cpu
      EV6</literal> defined for inclusion in the kernel config
      file. The <literal>cpu EV5</literal> is mandatory to keep
      &man.config.8; happy.</para>
    </sect3>
  </sect2>

  <sect2>
    <title>Supported Hardware Overview</title>

    <para>A word of caution: the installed base for &os; is not
    nearly as large as for &os;/Intel. This means that the enormous
    variation of PCI/ISA expansion cards out there has much less
    chance of having been tested on alpha than on Intel. This is not
    to imply they are doomed to fail, just that the chance of running
    into something never tested before is much higher.
    <filename>GENERIC</filename>
    contains things that are known to work on Alpha only.</para>

    <para>The PCI and ISA expansion busses are fully supported. Turbo
    Channel is not in <filename>GENERIC</filename> and has limited
    support (see the relevant machine model info).  The MCA bus is not
    supported. The EISA bus is not supported for use with EISA
    expansion cards as the EISA support code is lacking. ISA cards in
    EISA slots are reported to work. The Compaq Qvision EISA VGA card
    is driven in ISA mode and works OK as a console.</para>

    <para>1.44 Mbyte and 1.2 Mbyte floppy drives are supported.
    2.88 Mbyte drives sometimes found in Alpha machines are supported up to
    1.44Mbyte.</para>

    <para>ATA and ATAPI (IDE) devices are supported via the &man.ata.4;
    driver framework. As most people run their Alphas with SCSI disks
    it is not as well tested as SCSI. Be aware of boot-ability
    restrictions for IDE disks. See the machine specific information.</para>

    <para>There is full SCSI support via the CAM layer for Adaptec
    2940x (AIC7xxx chip-based), Qlogic family and Symbios. Be aware of
    the machine-specific boot-ability issues for the various adapter
    types.</para>

    <para>The Qlogic QL2x00 FibreChannel host adapters are fully
    supported.</para>

    <para>If you want to boot your Alpha over the Ethernet you will
    obviously need an Ethernet card that the SRM console
    recognizes. This generally means you need a board with an 21x4x
    Ethernet chip as that is what Digital used. These chips are driven
    by the &os; &man.de.4; (older driver) or &man.dc.4; (newer
    driver). Some new SRM versions are known to recognize the Intel
    8255x Ethernet chips as driven by the &os; &man.fxp.4; driver. But
    beware: the &man.fxp.4; driver is reported not to work correctly
    with &os; (although it works excellently on &os;/x86).</para>

    <para>DEC DEFPA PCI FDDI network adapters are supported on alpha.</para>

    <para>In general the SRM console emulates a VGA-compatibility mode
    on PCI VGA cards. This is, however, not guaranteed to work by
    Compaq/DEC for each and every card type out there. When the SRM
    thinks the VGA is acceptable &os; will be able to use it. The
    console driver works just like on a &os;/intel machine. 
    Please note that VESA modes are not supported on Alpha,
    so that leaves you with 80x25 consoles.</para>

    <para>In some Alpha machines you will find video adapters based
    on TGA chips. The plain TGA adapter does not emulate VGA and is
    therefore not usable for a &os; console. TGA2 cards have a basic
    VGA compatibility mode and work fine as &os; consoles.</para>

    <para>The <quote>PC standard</quote> serial ports found on most
    Alphas are supported.</para>

    <para>ISDN (i4b) is not supported on &os;/alpha.</para>
  </sect2>

  <sect2>
    <title>Acknowledgments</title>

    <para>In compiling this file I used multiple information sources,
    but <ulink url="http://www.netbsd.org/">the NetBSD Web
    site</ulink> proved to be an invaluable source of information.  If
    it wasn't for NetBSD/alpha there probably would not be a
    &os;/alpha in the first place.</para>

    <para>People who kindly helped me create this section:</para>
      <itemizedlist>
      <listitem>
        <para>&a.gallatin;</para>
      </listitem>
      <listitem>
        <para>&a.chuckr;</para>
      </listitem>
      <listitem>
        <para>&a.mjacob;</para>
      </listitem>
      <listitem>
        <para>&a.msmith;</para>
      </listitem>
      <listitem>
        <para>&a.obrien;</para>
      </listitem>
      <listitem>
        <para>Christian Weisgerber</para>
      </listitem>
      <listitem>
        <para>Kazutaka YOKOTA</para>
      </listitem>
      <listitem>
        <para>Nick Maniscalco</para>
      </listitem>
      <listitem>
        <para>Eric Schnoebelen</para>
      </listitem>
      <listitem>
        <para>Peter van Dijk</para>
      </listitem>
      <listitem>
        <para>Peter Jeremy</para>
      </listitem>
      <listitem>
        <para>Dolf de Waal</para>
      </listitem>
      <listitem>
        <para>Wim Lemmers, ex-Compaq</para>
      </listitem>
      <listitem>
        <para>Wouter Brackman, Compaq</para>
      </listitem>
      <listitem>
        <para>Lodewijk van den Berg, Compaq</para>
      </listitem>
    </itemizedlist>
  </sect2>
</sect1>