23 Jan
2018
23 Jan
'18
8:47 a.m.
On Tue, Jan 23, 2018 at 11:33 AM, Jack Harper via cctalk <
cctalk at classiccmp.org> wrote:
Greetings to the List from the Snowy Rocky Mountains.
Beautiful clear sunny day here at +9F :)
The SCSI controller on the 68K development system (VMEbus) that I have
cobbled together occasionally hangs after I reset one of the processor
boards (there are four MVME177-005 68060 boards in the VME rack).
The hang then happens when my software touches the SCSI drives via the
ROM'd 68K/Bug I/O primitives and the hang will not go away even after
another reset until I cycle power.
I have never before dealt with SCSI as a programmer - does this sound like
something is configured incorrectly?
There is not much to configure.
I point out that I am not certain that I have the termination resistors
correct.
Thoughts?
I appreciate any advice.
Regards,
Jack
Evergreen Colorado
Jack,
Yes, two things that I'd be checking
1) Make sure all drives are assigned a different number
2) Make sure you have termination somewhere.
Depending on the OS there are commands to display the scsi devices
attached, as the OS sees them.
Bill