Adaptec AHA-1540/SCO-ODT problems

[Ken Seefried iii]

--

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
	always with the message "WARNING: aha: spurious interrupt".

	Other notes: I (properly) have configured the machines CMOS
	setup with no hard drives installed.  After the initial power
	on, the hard disk light never again lights.  I am almost
	certain that the card is set with the factory defaults.  I
	have tried the card with jumper J5 both in and out.

Anyone seen this?  Any help greatly appreciated...

--

	ken seefried iii		ken at dali.gatech.edu

	"Vee haf veyz off making you talk...release da veasles..."