25 Nov
2004
25 Nov
'04
2:38 a.m.
On Thu, 2004-11-25 at 10:03 -0500, Joe R. wrote:
Jules,
Did you see this?
<http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1247&item=5141765514
&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)
cheers,
Jules