31 Mar
2000
31 Mar
'00
11:17 a.m.
At 18:35 31-03-2000 EST, Paxton wrote:
I have four Qbus cards that I am interested in finding
out what they are.
One is a Micro Technology QTS25. It has a 50 pin header. I was wondering if
it was a SCSI card?
QTS, IIRC, is (I'm pretty sure) a Viking Systems designation. Since Viking
made SCSI adapters for QBus and UniBus, I would consider that a likely guess.
Couple of ways to tell. First, look around the header to see if there are
any termination resistor packs. If there are, and they have a value stamp
along the lines of '221/331,' AND there are at least two, then it is very
possible you have a SCSI board.
Second way: Use an ohmmeter to check continuity between a known ground
point and the even-numbered pins on the header. If it is a SCSI connection,
all the even-numbered pins (with the exception of pin 26) will be grounded
(and pin 26 will be tied to +5V, probably).
The second is an Emulex QD331040100 Rev. J. This has a
60 pin header and two
26 pin headers. I was wondering if this was a SMD drive controller?
Right the first time. It can handle two drives.
The third is a Dilog DQ696-20.vThis has a 34 pin header
and two 20 pin
header. My guess is that it is a MFM or ESDI hard drive controller.
Your second guess is correct. It's ESDI. Up to four drives, IIRC.
In the same group of cards is a DEC M7546 which I
believe is a TK50 tape
drive controller. Why is it called a Maya Controller?
No idea, but you're correct again. The official designation is TQK50.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner and head honcho, Blue Feather Technologies
http://www.bluefeathertech.com // E-mail: kyrrin(a)bluefeathertech.com
Amateur Radio: WD6EOS since Dec. '77
"Our science can only describe an object, event, or living thing in our
own human terms. It cannot, in any way, define any of them..."