28 Feb
2002
28 Feb
'02
3:36 p.m.
Ran out to University of Michigan Property Disposition yesterday. First the
interesting things I didn't buy:
A bunch of DECServers in - A PDP/11 RACK. Some dunderhead stripped the rack
to make room for DECServer/200s.
which, in all honesty, are probably faster. The facia was beautiful,
vintage 70's computer.
"PDP 11/<don't remember> Digital Equipment Corporation, Maynard
Massachusets"
An empty HP/3000 Rack.
A few RS/6000's, one almost complete.
A couple of 8x4.3GB RAID racks, fully populated for $300 each. Almost worth
it.
A DEC R400X pedistal storage expansion unit.
A bunch of SBUS ethernet cards. 100Base-T I'm assuming, they were third
party.
A couple of wierd Xylinx boards with Intel 960 processors on them. I'm
assuming really beasty SCSI controllers cause of the SCSI high density type
jack on the back of them.
A few HP FDDI cards.
A bunch of ISA SCSI Cards, medium-old brand Adaptec.
Here's what I made off with:
Cabletron 24-port ethernet hub w/ fiber uplink.
Sun 1.3GB External SCSI drive box, the one in IPC/IPX form factor. Now I can
finally test those ELC's I picked up :)
Ann Arbor Audio Stereo Computer Mixer <-- Cool gadget, mixes computer and
two other audio sources
into an RCA line out and two headphone jacks.
Dell Dimension P-90 <-- To run BeOS. Slow, but a whopping 96MB of RAM. Not
bad for $25.
A few 2MB 30-pin SIMMs <-- To upgrade a few compact Macs I have.
VMEBus PrestoServe Board <-- For my Sun 4 which I'm still working on. Guess
it's gonna run SunOS :)
iMac 333 <-- Got it CHEAP. Gonna be a friend's internet computer. Nice
upgrade from his Performa 475.
----- Original Message -----
From: "Zane H. Healy" <healyzh(a)aracnet.com>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, February 28, 2002 3:48 AM
Subject: Re: SCSI options for PDP 11/23
decided
somewhere
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 >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 >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 |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |