27 Feb
2002
27 Feb
'02
6:48 p.m.
It did have the M8186 11/23 CPU in the 11/03 chassis
when I got it, not
that that means anything. I did change the memory module to a 128KW
MSV11-LK.
My guess is that the chassis has either got a different or upgraded
backplane. Is there any kind of a number on the backplane itself that you
can easily see?
OTOH, maybe I'm misremembering and a Q18 CPU will work in a Q16 backplane.
There's an older Q-bus VAX system at the University
that will probably be
taken out of service soon, and there's a chance I can grab its SCSI
controller (I'm not sure exactly what it has, but I know it has one).
Hopefully it's a CMD controller.
Its kind of hard to explain, but I'll try. I work
for a university on a
Actually it makes perfect sense.
to be corrected. Lacking the funding to develop
something new, combined
with everyone assuming I wouldn't be able to revive this system, I decided
to rebuilt it on my own. (We only had a few pieces of the original system
that attached to the DMA and PIO interfaces, which didn't work, and none
of the PDP equipment). It was working pretty well until the RX02
Are you using specific Q-Bus boards to interface with the equipment. This
could be a problem if you decided to try and move to a Q22 system.
incident. I was hoping I could scrape up a SCSI
controller from somewhere
around the university, so I could have a longer-term storage option. So
in the next couple of months, it will get used for a "production" purpose,
but then it won't be needed for quite awhile.
Something else you might want to look for is an ESDI controller. It would
allow you to use slightly more reliable disks, though SCSI is the best.
The important thing is to stay away from MFM disks!
Zane
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh(a)aracnet.com (primary) | OpenVMS Enthusiast |
| | Classic Computer Collector |
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