SCSI Controller Hanging... - test-drb@ccmp.vtda.org

24 Jan 2018

Hello Plamen -

I use the SCSI controller that is built into the MVME177 transition module.

No, when I RESET the system, I just press the 
RESET button on the processor board - usually 
when it is hung with my software.  On this 
system, I only code in 68K assembly and so I do see the "occasional" hang :)

Is the "SCSI reset option" part of the 68K/BUG RESET command?

In my documentation - and I easily may not have 
the latest documentation - I only see RESET 
options to force a COLD or WARM start on hardware RESET.

The documentation that I have also cautions: 
"...may cause the disk controller to be out of 
phase with respect to the disk configuration 
tables in memory", which certainly makes sense.

However, I do not modify any of those tables from system default.

I appreciate your input.

Regards,

Jack
Evergreen, Colorado

At 11:57 AM 1/23/2018, Plamen Mihaylov wrote:
...
 What SCSI controller are? you using - MVME320, 327 or
328 ?
Do you reset the MVME177 board using RESET 
command from 177bug> along with SCSI bus reset?  option?

Best regards,
Plamen

On Tue, Jan 23, 2018 at 6:33 PM, Jack Harper via 
cctalk <<mailto:cctalk at classiccmp.org>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 Harper, President
Secure Outcomes Inc
2942 Evergreen Parkway, Suite 300
Evergreen, Colorado 80439 USA

<tel:303.670.8375>303.670.8375
<tel:303.670.3750>303.670.3750? (fax)

<http://www.secureoutcomes.net>http://www.secureoutcomes.net 
for Product Info.

----------------------------------------------------------------------------------
Jack Harper, President
Secure Outcomes Inc
2942 Evergreen Parkway, Suite 300
Evergreen, Colorado 80439 USA

303.670.8375
303.670.3750 (fax)

http://www.secureoutcomes.net for Product Info. 