On Tue, Jan 23, 2018 at 11:33 AM, Jack Harper via cctalk < cctalk@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
