14 Apr
2017
14 Apr
'17
10:45 a.m.
On Fri, 14 Apr 2017, Bill Gunshannon via cctalk wrote:
Well, I don'c consider something passive (having
only inert parts) to be
similar to a device with active parts, but that's just my opinion. :-)
dissimilar designs can be done for functionally compatible systems.
Mine is 40 pin to 50 pin, definitely for the Model I
and looks exactly like the
Screen Printer cable in the last picture I was sent.
Great! Curiousity assuaged.
I had thought that both ends of the Screen printer cable would be 40 pin,
That's why I had speculated on Model 3.
But I never spent $599 for one.
(instead, I struggled with interfacing a DTC-300 HyType 1 serial printer)
I just cheked both the manual and looked at the E/I
itself and the Line
Printer Port is 34 pins and Centronics signals so no special cable there.
I know that was the case on the Model 3 and Model 4.
Yes, the model 1, 3, and 4 parallel printer ports ("Line Printer Port")
are essentially the same. If you examine the circuitry in the interfaces,
you might not think that they are "similar" :-) They all use the
#26-1401 printer cable (34 pin IDC card-edge to 36 pin "blue ribbon")
My homemade 34 pin to 50 pin cables for 8" drives (crimp with a couple of
wires moved) is functionally similar to D-Bit's FDADAP, but electrically
dissimilar, in that I don't implement TG43, when used in a read-only
situation. If that were to have been available at the time, it would
have saved me a lot of wasted time bread-boarding a totally unnecessary
"break-out".