27 Feb
2020
27 Feb
'20
5:26 p.m.
More in the trivia department, the DA15 was used for AUI interconnection
in the 10base-5, -2, and early -T days, as well as analog joysticks.
I'm surprised to see wikipedia saying that the high-density ones had DA
to DE designations, I have only seen them in catalogs with full part
numbers.? Could this be a backronym-style regression?
cheers,
Nigel
On 27/02/2020 19:51, Fred Cisin via cctalk wrote:
On Thu, 27 Feb 2020, Paul Koning via cctalk wrote:
--
Nigel Johnson
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No idea.? I just got a new L-Com catalog, which
has a large section
of "D-Sub" connectors and cables.? It lists the following sizes:
2-row: 9, 15, 25, 37, 50 pin
3-row: 15, 26, 44, 62, 78 pin
So 52 pins is halfway between two standard sizes.? For some
definition of "standard", of course.? 2-row 9, 15, and 25 pin are
common, 37 is for RS-422 if I remember right but I haven't seen it in
ages.
A trivial data point:
DC-37 was used by PC (5150), XT (5160) for external floppy drive,
Used a lot of those, especially for tape drives and infrequently used
drives, such as 3.25" and 3", 720K 5.25", 100tpi 5.25", 67.5 tpi
3.5",
etc.
also used even by IBM on some add-on external floppies for some PS/2s.
DC-37 was also on the externally-controlled Canon CX printer engines,
so I had some cables and even switchboxes for those.
(Cordata/CoronaDataSystems, Eiconscript (both HP and Postscript
emulation!), JLaser, etc.)
Anybody have any interest in those?
The Amiga used a couple of D23 connectors.? I cut up some DB25s when I
needed them.
?-- as many people here know, the common 9-pin
serial connector is
not actually a "DB-9" connector but rather a DE-9.
When I had a lot of DB25 cables on hand, I had a few that only had
pins in place in positions 1-8 and 20.? Would those 9 pins make it a
"DB-9"?? :-)
--
Grumpy Ol' Fred???????????? cisin at xenosoft.com