Add supported processors and motherboards sections from the MD

hardware notes documents in  */proc-*.sgml.

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 </sect1>
 
+<sect1 id="proc">
+  <title>Supported Processors and System Boards</title>
+
+  <para>This section provides some architecture-specific information
+    about the specific processors and systems that are supported by
+    each architecture.</para>
+
+<sect2 id="proc-amd64">
+  <title>amd64</title>
+
+  <para>Since mid-2003 &os;/&arch.amd64; has supported the AMD64
+    (<quote>Hammer</quote>) and Intel EM64T architecture,
+    and is now one of the Tier-1 platforms (fully
+    supported architecture), which are expected to be Production
+    Quality with respects to all aspects of the &os; operating system,
+    including installation and development environments.</para>
+
+  <para>Note that there are two names for this architecture,
+    AMD64 (AMD) and Intel EM64T (Extended Memory 64-bit Technology).
+    64-bit mode of the two architectures are almost compatible
+    with each other, and &os;/&arch.amd64; should support them both.</para>
+
+  <para>As of this writing, the following processors are
+    supported:</para>
+
+  <itemizedlist>
+    <listitem>
+      <para>AMD Athlon64 (<quote>Clawhammer</quote>).</para>
+    </listitem>
+
+    <listitem>
+      <para>AMD Opteron (<quote>Sledgehammer</quote>).</para>
+    </listitem>
+
+    <listitem>
+      <para>Intel 64-bit Xeon (<quote>Nacona</quote>).
+	This processor is fabricated on 90nm process technology, and operates
+	with 2.80 to 3.60 GHz (FSB 800MHz) and Intel E7520/E7525/E7320 chipsets.</para>
+    </listitem>
+
+    <listitem>
+      <para>Intel Pentium 4 Processor supporting Intel EM64T
+	(<quote>Prescott</quote>).
+	This is fabricated on 90nm process technology,
+	uses FC-LGA775 package, and operates with 3.20F/3.40F/3.60F GHz
+	and Intel 925X Express chipsets.
+	The corresponding S-Spec numbers are SL7L9, SL7L8, SL7LA, SL7NZ, SL7PZ,
+	and SL7PX.  Note that processors marked as 5xx numbers do not support
+	EM64T.</para>
+    </listitem>
+  </itemizedlist>
+
+  <para>Intel EM64T is an extended version of IA-32 (x86) and
+    different from Intel IA-64 (Itanium) architecture, which &os;/ia64
+    supports.  Some Intel's old documentation refers to Intel EM64T as
+    <quote>64-bit extension technology</quote> or <quote>IA-32e</quote>.</para>
+
+  <para>The largest tested
+    memory configuration to date is 8GB.  SMP support has been
+    recently completed and is reasonably robust.</para>
+
+  <para>In many respects, &os;/&arch.amd64; is similar to &os;/&arch.i386;, in
+    terms of drivers supported.  There may be some issues with 64-bit
+    cleanliness in some (particularly older) drivers.  Generally,
+    drivers that already function correctly on other 64-bit platforms
+    should work.</para>
+
+  <para>&os;/&arch.amd64; is a very young platform on &os;.  While the
+    core &os; kernel and base system components are generally
+    fairly robust, there are likely to still be rough edges,
+    particularly with third party packages.</para>
+
+</sect2>
+
+<sect2 id="proc-i386">
+  <title>i386</title>
+
+  <para>&os;/&arch.i386; runs on a wide variety of <quote>IBM PC
+    compatible</quote> machines.  Due to the wide range of hardware
+    available for this architecture, it is impossible to exhaustively
+    list all combinations of equipment supported by &os;.
+    Nevertheless, some general guidelines are presented here.</para>
+
+  <para>Almost all i386-compatible processors with a floating point unit
+    are supported.  All
+    Intel processors beginning with the 80486 are supported, including
+    the 80486, Pentium, Pentium Pro, Pentium II, Pentium III,
+    Pentium 4, and variants thereof, such as the Xeon and Celeron
+    processors.  All i386-compatible AMD
+    processors are also supported, including the Am486, Am5x86, K5, K6
+    (and variants), Athlon (including Athlon-MP, Athlon-XP, Athlon-4,
+    and Athlon Thunderbird), and Duron processors.  The AMD
+    &Eacute;lan SC520 embedded processor is supported.  The Transmeta
+    Crusoe is recognized and supported, as are i386-compatible
+    processors from Cyrix and NexGen.</para>
+
+  <para>There is a wide variety of motherboards available for this
+    architecture.  Motherboards using the ISA, VLB, EISA, AGP, and PCI
+    expansion busses are well-supported.  There is some limited
+    support for the MCA (<quote>MicroChannel</quote>) expansion bus
+    used in the IBM PS/2 line of PCs.</para>
+
+  <para>Symmetric multi-processor (SMP) systems are generally
+    supported by &os;, although in some cases, BIOS or motherboard
+    bugs may generate some problems.  Perusal of the archives of the
+    &a.smp; may yield some clues.</para>
+
+  <para>&os; will take advantage of HyperThreading (HTT) support on
+    Intel CPUs that support this feature.  A kernel with the
+    <literal>options&nbsp;SMP</literal> feature enabled will
+    automatically detect the additional logical processors.  The
+    default &os; scheduler treats the logical processors the same as
+    additional physical processors; in other words, no attempt is made
+    to optimize scheduling decisions given the shared resources
+    between logical processors within the same CPU.  Because this
+    naive scheduling can result in suboptimal performance, under
+    certain circumstances it may be useful to disable the logical
+    processors with the
+    the <varname>machdep.hlt_logical_cpus</varname> sysctl variable.
+    It is also possible to halt any CPU in the idle loop with the
+    <varname>machdep.hlt_cpus</varname> sysctl variable.  The
+    &man.smp.4; manual page has more details.</para>
+
+  <para>&os; will take advantage of Physical Address Extensions (PAE)
+    support on CPUs that support this feature.  A kernel with the
+    <literal>PAE</literal> feature enabled will detect memory above
+    4 gigabytes and allow it to be used by the system.  This feature
+    places constraints on the device drivers and other features of
+    &os; which may be used; consult the &man.pae.4; manpage for more
+    details.</para>
+
+  <para>&os; will generally run on i386-based laptops, albeit with
+    varying levels of support for certain hardware features such as
+    sound, graphics, power management, and PCCARD expansion slots.
+    These features tend to vary in idiosyncratic ways between
+    machines, and frequently require special-case support in &os; to
+    work around hardware bugs or other oddities.  When in doubt, a
+    search of the archives of the &a.mobile; may be useful.</para>
+
+  <para>Most modern laptops (as well as many desktops) use the
+    Advanced Configuration and Power Management (ACPI) standard.  &os;
+    supports ACPI via the ACPI Component Architecture reference
+    implementation from Intel, as described in the &man.acpi.4; manual
+    page.  The use of ACPI causes instabilities on some machines and it
+    may be necessary to disable the ACPI driver, which is normally
+    loaded via a kernel module.  This may be accomplished by adding
+    the following line to <filename>/boot/device.hints</filename>:</para>
+
+  <programlisting>hint.acpi.0.disabled="1"</programlisting>
+
+  <para>Users debugging ACPI-related problems may find it useful to
+    disable portions of the ACPI functionality.  The &man.acpi.4;
+    manual page has more information on how to do this via loader
+    tunables.</para>
+
+  <para>ACPI depends on a Differentiated System Descriptor Table
+    (DSDT) provided by each machine's BIOS.  Some machines have bad or
+    incomplete DSDTs, which prevents ACPI from functioning correctly.
+    Replacement DSDTs for some machines can be found at the <ulink
+    url="http://acpi.sourceforge.net/dsdt/index.php">DSDT</ulink>
+    section of the <ulink
+    url="http://acpi.sourceforge.net/">ACPI4Linux</ulink> project Web
+    site.  &os; can use these DSDTs to override the DSDT provided by
+    the BIOS; see the &man.acpi.4; manual page for more
+    information.</para>
+</sect2>
+
+<sect2 id="proc-ia64">
+  <title>ia64</title>
+
+  <para>Currently supported processors are the
+    <ulink url="http://people.freebsd.org/~marcel/refs/ia64/itanium/24532003.pdf">
+    Itanium</ulink> and the
+    <ulink url="http://people.freebsd.org/~marcel/refs/ia64/itanium2/25111003.pdf">
+    Itanium 2</ulink>.</para>
+
+  <para>Supported chipsets include:</para>
+   <itemizedlist>
+     <listitem>
+       <para>HP zx1</para>
+     </listitem>
+     <listitem>
+       <para>Intel 460GX</para>
+     </listitem>
+     <listitem>
+       <para>Intel E8870</para>
+     </listitem>
+   </itemizedlist>
+
+  <para>Both Uniprocessor (UP) and Symmetric Multi-processor (SMP)
+    configurations are supported.</para>
+
+  <sect3>
+    <title>Supported Devices Overview</title>
+
+    <para>Most devices that can be found in or are compatible with
+      &arch.ia64; machines are fully supported.  The notable exception
+      is the VGA console. The &os; support for VGA consoles is at
+      this time too much based on PC hardware and not all &arch.ia64;
+      machines have chipsets that provide sufficient PC legacy
+      support. As such &man.syscons.4; can not be enabled and the
+      use of a serial console is required.</para>
+  </sect3>
+</sect2>
+
+<sect2 id="proc-pc98">
+  <title>pc98</title>
+
+  <para>NEC PC-9801/9821 series with almost all i386-compatible processors,
+    including 80486, Pentium, Pentium Pro, Pentium II, and variants.
+    All i386-compatible processors by AMD, Cyrix, IBM, and IDT
+    are also supported.</para>
+
+  <para>NEC FC-9801/9821 series, and NEC SV-98 series
+    (both of them are compatible with PC-9801/9821 series)
+    should be supported.</para>
+
+  <para>EPSON PC-386/486/586 series, which are
+    compatible with NEC PC-9801 series are supported.</para>
+
+  <para>High-resolution mode is not supported.
+    NEC PC-98XA/XL/RL/XL^2, and NEC PC-H98 series
+    are supported in normal (PC-9801 compatible) mode only.</para>
+
+  <para>Although there are some multi-processor systems
+    (such as Rs20/B20), SMP-related features of &os;
+    are not supported yet.</para>
+
+  <para>PC-9801/9821 standard bus (called C-Bus),
+    PC-9801NOTE expansion bus (110pin),
+    and PCI bus are supported.
+    New Extend Standard Architecture (NESA) bus
+    (used in PC-H98, SV-H98, and FC-H98 series) is not supported.</para>
+
+</sect2>
+
+<sect2 id="proc-powerpc">
+  <title>powerpc</title>
+
+  <para>The information for this paragraph has yet to be compiled.</para>
+
+</sect2>
+
+<sect2 id="proc-sparc64">
+  <title>sparc64</title>
+
+  <para>This section describes the systems currently known to be supported
+    by &os; on the UltraSPARC platform.  For background information on the
+    various hardware designs see the <ulink url="http://sunsolve.sun.com/handbook_pub/">Sun System Handbook</ulink>.</para>
+
+  <para>SMP is supported on all systems with more than 1 processor.</para>
+
+  <para>If you have a system that is not listed here, it may not have
+    been tested with &os; &release.current;.  We encourage you to
+    try it and send a note to the &a.sparc; with your results,
+    including which devices work and which do not.</para>
+
+  <sect3>
+    <title>Fully Supported Systems</title>
+
+    <para>The following systems are fully supported by &os;.</para>
+
+      <itemizedlist>
+        <listitem>
+          <para>Blade 100</para>
+        </listitem>
+        <listitem>
+          <para>Blade 150</para>
+        </listitem>
+        <listitem>
+          <para>Enterprise 220R</para>
+        </listitem>
+        <listitem>
+          <para>Enterprise 250</para>
+        </listitem>
+        <listitem>
+          <para>Enterprise 420R</para>
+        </listitem>
+	<listitem>
+	  <para>Enterprise 450</para>
+	</listitem>
+        <listitem>
+          <para>Fire V100</para>
+        </listitem>
+        <listitem>
+          <para>Fire V120</para>
+        </listitem>
+        <listitem>
+          <para>Netra t1 105</para> 
+        </listitem>
+        <listitem>
+          <para>Netra T1 AC200/DC200</para> 
+        </listitem>
+        <listitem>
+          <para>Netra t 1100</para>
+        </listitem>
+        <listitem>
+          <para>Netra t 1120</para>
+        </listitem>
+        <listitem>
+          <para>Netra t 1125</para>
+        </listitem>
+        <listitem>
+          <para>Netra t 1400/1405</para>
+        </listitem>
+        <listitem>
+          <para>Netra 120</para>
+        </listitem>
+        <listitem>
+          <para>Netra X1</para>
+        </listitem>
+        <listitem>
+          <para>SPARCEngine Ultra AXi</para>
+        </listitem>
+        <listitem>
+          <para>SPARCEngine Ultra AXmp</para>
+        </listitem>
+        <listitem>
+          <para>Ultra 1 (serial console)</para>
+        </listitem>
+        <listitem>
+          <para>Ultra 1E</para>
+        </listitem>
+        <listitem>
+          <para>Ultra 2</para>
+        </listitem>
+        <listitem>
+          <para>Ultra 5</para>
+        </listitem>
+        <listitem>
+          <para>Ultra 10</para>
+        </listitem>
+        <listitem>
+          <para>Ultra 30</para>
+        </listitem>
+        <listitem>
+          <para>Ultra 60</para>
+        </listitem>
+        <listitem>
+          <para>Ultra 80</para>
+        </listitem>
+      </itemizedlist>
+  </sect3>
+
+  <sect3>
+    <title>Partially Supported Systems</title>
+
+    <para>The following systems are partially supported by &os;.  In particular
+      the onboard scsi controller in sbus systems is not supported.</para>
+
+      <itemizedlist>
+        <listitem>
+          <para>Enterprise 3500</para>
+        </listitem>
+        <listitem>
+          <para>Enterprise 4500</para>
+        </listitem>
+      </itemizedlist>
+  </sect3>
+
+  <sect3>
+    <title>Unsupported Systems</title>
+
+    <para>The following systems are not supported by &os;.  This may be due
+      to lack of processor support (UltraSPARC III), due to a quirk in the
+      system design that makes &os; unstable, or due to lack of support for
+      sufficient onboard devices to make &os; generally useful.</para>
+
+      <itemizedlist>
+        <listitem>
+          <para>All systems containing UltraSPARC III processor(s).</para>
+        </listitem>
+      </itemizedlist>
+  </sect3>
+</sect2>
+
+</sect1>
+
 <!--
 
 	The "Supported Devices" section of the release notes.