Re: Followup on 274xT Adaptec

Justin T. Gibbs (
Tue, 09 Sep 1997 21:09:49 -0600

>Justing, according the the books on these chipsets, what exact conditions
>can cause the settings of SIMODE0 and 1 to get changed, and does it matter
>if we set the conditions prior to enabling the bus drivers? Could the fact
>that we are doing the outb(ENABLE, p->base + BCTL); after we set the SIMODE?
>registers be causing the B channel settings not to take?

It shouldn't make a difference.

>Also, I wonder how
>a completely absent cable and termination would effect how the card handles
>these things.

You should still get selection timeouts.

Justin T. Gibbs
  FreeBSD: Turning PCs into workstations