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| author | gibbs <gibbs@FreeBSD.org> | 1996-04-28 19:43:10 +0000 |
|---|---|---|
| committer | gibbs <gibbs@FreeBSD.org> | 1996-04-28 19:43:10 +0000 |
| commit | c17cc2e1bedeb94384f0251f46ed703860b946d6 (patch) | |
| tree | f93d9e23f1c064d8feee303756ce56b6d7d8a98a /share/man/man4/ahc.4 | |
| parent | a18fa55c6a9fe716740f5513c43a0e2345021f19 (diff) | |
| download | FreeBSD-src-c17cc2e1bedeb94384f0251f46ed703860b946d6.zip FreeBSD-src-c17cc2e1bedeb94384f0251f46ed703860b946d6.tar.gz | |
Bring back the AHC_TAGENABLE compile option and document it. You must
use this option to get tagged queuing. Just like the old days.
Diffstat (limited to 'share/man/man4/ahc.4')
| -rw-r--r-- | share/man/man4/ahc.4 | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/share/man/man4/ahc.4 b/share/man/man4/ahc.4 index 1600738..3864193 100644 --- a/share/man/man4/ahc.4 +++ b/share/man/man4/ahc.4 @@ -40,6 +40,9 @@ For one or more PCI cards: .Cd controller pci0 .Cd controller ahc0 .Pp +To enable tagged queueing: +.Cd options AHC_TAGENABLE +.Pp To enable SCB paging: .Cd options AHC_SCBPAGING_ENABLE .Pp @@ -58,13 +61,17 @@ or .Tn AIC7880 host adapter chips. Features include support for twin and wide busses, -ultra SCSI, -two commands per non-tagged queueing target, +ultra +.Tn SCSI, +two active commands at a time per non-tagged queueing target, tagged queuing, and SCB paging which allows up to 255 active commands on all adapters except those using .Tn AIC7770 chips prior to revision E. +Tagged queueing is enabled with the +.Dq Dv AHC_TAGENABLE +configuration option. SCB paging is enabled with the .Dq Dv AHC_SCBPAGING_ENABLE configuration option. |
