adaptec 2940

[David Hogan dhog@lore.plan9.cs.su.oz.au]

>It tried to get the developer manual for the 2940, but those chumps from
>adapted are really fucked up. I am gonna call up marketing and shout a
>little a bit maybe it'll helps.

I'm also interested in the 2940 -- 2940U to be precise.  It's funny that
you should post that message right now, because I've just started looking
for this information.  I have recently purchased a PPro (venus motherboard)
and a 2940U, and I intend to write full support for PCI, Plug & Play,
and the 2940U (amongst other things...).

Anyway, the chip in the 2940U is an aic7880, made by adaptec.  Not sure
about the non-U card, I think the part is an aic7870 or something similar
(aic7770?  aic7xxx anyway...).  Apparently there is some 1-800 number
you can dial to get the datasheets.

There's a driver for this card in FreeBSD.  It's quite complex.  The
chip has it's own microcode engine, which you need to write code for,
to handle the various scsi phases and pheatures.  Definately not a
1 weekend job.  OTOH, the card should scream along once the driver
is written  (and debugged...) :-)