28 Feb
2020
28 Feb
'20
7:37 a.m.
Huh. New to me too, but Digikey links to the datasheets, and they really do mean DB.
They go up to DD100. They are called “double density”.
This reminds me of the circa 1990 “HIPPI” interface, or high performance parallel
interface. They typically ran at 50 MB/sec. The connectors were two-row 100-pin D style.
See
http://www.elpeus.com/scsi-cables/100pin-scsi-cable-hippi/3m-100pin-male-to…
<http://www.elpeus.com/scsi-cables/100pin-scsi-cable-hippi/3m-100pin-male-to-100pin-male-scsi-cable-hippi/>
for example.
We used these cables and connectors on the first Alpha machines at Digital to connect the
3Max front end processor to the ECL based Alpha Demonstration Units, although the protocol
was different. The connector was about the biggest that would fit on a TurboChannel I/O
card.
On 2020, Feb 27, at 7:04 PM, Dave Horsfall
<dave(a)horsfall.org> wrote:
On Thu, 27 Feb 2020, Adam Thornton wrote:
I recently have pulled out of the trash a
plugboard with a male and a female D-Sub 52 connector. 3 rows of pins, 17-18-17. I took
the connectors off the board: there's nothing back there, so this thing only ever
existed so you could plug the random cable you found into it and its friends to see what
the cable fit.
That would be something like a DD-52P (certainly not a DB-52P!).
I can't find much evidence that a 52-pin
D-Sub ever existed.
Well, Digikey seem to have them:
http://www.digikey.com/product-detail/en/itt-cannon-llc/2DB-52P/2DB-52P-ND/…
No photo, though...
-- Dave_______________________________________________
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