Punched card readers

From: Douglas Quebbeman <dhquebbeman_at_theestopinalgroup.com>
Date: Fri Jun 22 15:33:18 2001

> Does anyone have Docs for the Documation punch card readers? I'd like to
> hook one up to a PDP 8/e or 11, but i'm concerned about finding or making
> the proper interface cable. I think the documation card readers used a
> strange (to me, at least) interface connector that i'm not sure is available
> anymore, plus I dont have the information necessary to create the cable.

IIRC (questionable), they used standart V.35-type connectors. But since
V.35 is generally a serial interface, and the reader would most likely
be parallel, dunno about the pinout...

How hard would it be to figure out which lines were input to the
card reader (there might be an 'enable' line or something like that)?
If it turns out there are no input lines to the reader, then all
lines coming out are output, and in the case of the fairly-recent
Documation readers, they should be TTL-level signals. Hook up a
bank of appropriately-wired LEDs to determine which line are
data and which is strobe.

Just a thought... -dq
Received on Fri Jun 22 2001 - 15:33:18 BST