Adaptec AHA-1540/SCO-ODT problems

[Ed Whittemore]

In article <12763 at hydra.gatech.EDU> ken at dali.gatech.edu (Ken Seefried iii) writes:
>--
>
>I'm having a bit of trouble with a machine that I am trying to bring
>SCO-ODT up on, I I thought someone else might have plowed through
>this.
>
>The details:
>
>	Zenth 16-MHz 80386 machine (no FP, no cache) Model 300 (I think)
>	2 4-MB, 32-bit memory cards
>	DTC1010 ST-506 HD/FD controller + 1.2MB floppy
>	Adaptec AHA-1540 SCSI controller + CDC 94171-344 Hard drive
>
>The problem:
>
>	I want the SCSI drive to be the root (only) drive.  There is
>	no hard drive attached to the DTC1010.  When I power on the
>	machine, I get the Adaptec SCSI BIOS banner, at witch point it
>	goes looking for devices.  It seems to find the CDC just fine.
>	I then proceed to load boot disks N1 and N2.  The initial SCO
>	banner correctly shows all devices (including "adapter") and
>	proper memory size, etc.  However, when I attempt to
>	initialize the disk, the machine hangs, usually, but not

...

The Zenith 16 MHZ machines do not support bus master DMA on the part 
of the Host Adaptor--the Adaptec card WILL NOT WORK. You can test this
yourself by running the DMA test at DC00:9 or whatever you have the
bios address set to.
-- 
Ed Whittemore   uunet!maxed!ed   ed at maxed.amg.com
American Micro Group, Inc.   201-944-3293