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View Full Version : PS/2 Model 95 by any other name 8-)



Keith Matthews
April 20th, 2017, 05:14 PM
Today I loaded PC DOS 7.0 and OS/2 3 Warp onto an IBM 3172 Mainframe Service Processor Controller, which is really just a PS/2 model 95 (Pentium 90) machine under the covers in a big ugly Industrial style case. 8-)

Took a bit of mucking around to find an LCD display that would handle the old XGA2 Microchannel cards output, and also had to scrape up a 320 MB SCSI drive.

I was amazed when the 20+ year old 320MB scsi drive I used, which was actually an RS/6000 model 320 part worked perfectly, without any bad sectors.

Mind you I had 3 to choose from. 1 didn't even power up, and the 3rd wouldn't format. Not a bad result though.

Got the Reference Disk and Diagnostic Disk off the Web, recreated the System Partition on the Hard Drive, and Installed DOS and OS/2 with a boot manager.

Cool.

8-)

Memories,........ doo doo doo doo doo doo dooo.......

8-)
__________________
Regards.......GeoKM
oooOOOooo

luckybob
April 20th, 2017, 05:54 PM
seriously? No pictures.

SHAME.

Keith Matthews
April 20th, 2017, 07:41 PM
seriously? No pictures.

SHAME.

Pictures are coming 8-)

Keith Matthews
April 20th, 2017, 07:57 PM
seriously? No pictures.

SHAME.

Here is the 3172 Service Processor in all its Glory 8-)

37906

And Inside

37907
37908

The SCSI Hard Drive, Was Ex RS/6000 model 320H. Boy I replaced a few of these in my day!

37909

And here is what I loaded.....

Amazing. Not a single error on the HDD or the Diskettes. 8-)

37910

8-)

luckybob
April 20th, 2017, 08:42 PM
yep. It damn sure looks like a 8595 on the inside. That hard drive placement sucks though. How usable is the front panel?

Keith Matthews
April 20th, 2017, 09:19 PM
yep. It damn sure looks like a 8595 on the inside. That hard drive placement sucks though. How usable is the front panel?

It's not.

I rekon it was purely for the use of the the controller microcode as it is connected via a ribbon cable internally to the parallel port. I guess one could try and work out how to talk to it. 8-). It actually causes the Parallel Port diags to fail, so it might be a non standard wiring of some kind?


There is no actual LCD or OP panel like on an actual 8595. The header where the cable would normally connect only has a small cable connecting the speaker. 8-/

Pretty nice machine though for DOS and OS/2. Fly's 8-)

Only has 32MB Memory installed in 4 x 8MB. With 4 more available mem slots. Still More than enough in the day! 8-)

luckybob
April 20th, 2017, 11:35 PM
if it is different, that's sad. I was hoping for a new source for simms for my 9595. :P I really want 8x 32mb simms :(