31 Mar
2000
31 Mar
'00
12:35 p.m.
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?
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?
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.
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?
Thanks for the help.
Paxton
31 Mar
31 Mar
1:54 p.m.
At 06:35 PM 3/31/00 -0500, Paxton wrote:
One is a Micro Technology QTS25. It has a 50 pin
header. I was wondering if
it was a SCSI card?
I've never seen one "in-the-flesh" as it were but the picture of one I saw
looked like a SCSI card based on the Viking design. You can identify it by
the single LED, and the microprocessor on it.
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?
No clue.
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.
This is the "fast" version of the Dilog ESDI controller. It will control
two drives and can handle 20Mhz drives w/ 1:1 interleave. (24Mhz drives
still need 2:1). In my experience it is more rare than the 696-15 and plain
696 which is I believe 10Mhz. Its a nice controller (I've got two) and
supported by NetBSD. Info is still available from the Manufacturer!
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 clue on what the history is on this one.
--Chuck
2:17 p.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..."
2:39 p.m.
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?
It's a tape only SCSI card.
The rest of this is straight out of the field guide that Megan has.
http://world.std.com/~mbg/pdp11-field-guide.txt
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?
QD33 Q Emulex SMD controller for up to two SMD disks.
Supports SMD-0 and SMD-E, with data rates up to
24MHz for SMD-E. MSCP emulation. DMA (uses
adaptive techniques and block mode, supports
scatter-write and gather-read on the uVAX-I).
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.
DQ696 Q Dilog 2 x ESDI disk controller. Emulates MSCP.
(supports Fujitsu 2333)
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?
M7546 TQK50-AA Q TMSCP controller for TK50 tape unit
M7546 Refs: uNOTE N#041
Zane
8829
days inactive
8829
days old
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