Pictures Re: Masscomp computers?

From: Jules Richardson <>
Date: Thu Nov 25 10:38:24 2004

On Thu, 2004-11-25 at 10:03 -0500, Joe R. wrote:
> Jules,
> Did you see this?
> <
> &rd=1&ssPageName=WDVW#ebayphotohosting>

Hmm, now that's interesting. That appears to be a single channel board,
and without *that* much silicon on it. Maybe it was offered as an
upgrade to earlier Tower owners who had the ST506/tape/floppy board in
their systems, so that they could use SCSI tapes and disks. I've not
come across one of those critters before...

The board in my Tower's a lot bigger, with a pair of 80188 processors
and 8MB of cache memory - it's dual channel SCSI, with the internal
channel that drives the disks and SCSI tape being single-ended, and the
other channel being differential that leads to an external connector.
Quite a monster of a board! There's also a large Motorola SC87960RCB IC
- I have no idea what that one does; maybe something to do with the
Multibus side of things...

Looks like that EBay board is 1987; my Tower one is 1988, so there's not
a lot in it!

[ST506 board]
> If you'll post a picture of your card I'll compare it against
> the drawings in the manual and see if it matches.

Will do - I *think* I know where it is. It's one of those things I
grabbed before the Tower 400 it was in hit the trash; that was about ten
years ago and I've still got the darn thing :) (and the serial board the
was in the machine - I can't remember if that one's a HPSIO or not)


Received on Thu Nov 25 2004 - 10:38:24 GMT

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