23 Jun
2015
23 Jun
'15
7:54 a.m.
Hi all,
I could acquire *four* rotten PC05 Papertape Reader/Punches for PDP-11.
I'm now restoring them.
One of these is strange:
Normally, the feed hole (between data hole 3 and 4) is used to clock in
bits from the data holes.
But this very special PC05 does not have a phototransistor for the feed
hole, so the data clock signal must be generated by the stepper motor
driver.
Maybe it's a very old model: the READER CONTROL module is M705, not the
usual M7050. And there's no doc for it.
Does anybody has a FPMS with schematics for the M705 modul? Perhaps as
part of some PDP-8 doc?
Thanks,
Joerg