Adaptec SCSI and Hayes JT FAX 9600

[Rick Richardson]

We have a customer with an Adaptec SCSI controller who is
trying to install a Hayes JT FAX 9600 fax board in his system.
Relevant info (that I have) is the following:

	1) Soya motherboard
	2) 8 mhz bus
	3) ISC 2.0.2 UNIX
	4) Adaptec SCSI controller
	4) All other cards except VGA adapter removed.

[seg addrs supplied below, sed 's/://' if you prefer byte addrs]

The system crashes or locks up when the Hayes board is installed,
whether or not a device driver for it has been configured into
the kernel.  The Hayes board is an 8 bit device, no interrupts,
no DMA, no I/O ports.  It uses 2K of memory address space
configurable between 8000:0 and EFFF:0.  Several places have
been tried (according to the customer), including the default
CC00:0, D000:0, D200:0, and E000:0.

The customer says that the lock up occurs after UNIX has been
booted when the filesystem is mounted, and that the lock-up
doesn't occur if the filesystem is mounted read-only (!!!???).
Assuming the board is set for a D200:0 starting address,
he says that the tell-tale 'magic number' for the Hayes board
(the word ASHER), appears to move from D200:0 to D1FF:0 after
the filesystem is mounted, which is the damndest thing I ever
heard of.  [Note the customer is somewhat non-technical, so
it is possible that what he's telling me may be suspect].

I haven't run into any other disk controllers that exhibit
this compatibility problem with the Hayes, which is usually
one of the least painful boards to add to a system.

I'm clueless.  Anybody got a clue?  Where's Roy Neese when
you need him!

-Rick

-- 
Rick Richardson | Looking for FAX software for UNIX/386 ??? Ask About: |Mention
PC Research,Inc.| FaxiX - UNIX Facsimile System (tm)                   |FAX# for
uunet!pcrat!rick| FaxJet - HP LJ PCL to FAX (Send WP,Word,Pagemaker...)|Sample
(201) 389-8963  | JetRoff - troff postprocessor for HP LaserJet and FAX|Output