Well, I've now acquired a PC05 high-speed paper tape reader/punch for
the PDP-11/20 I'm currently restoring. I still lack the PC11 board,
though. Megan's list says the following:
M781 PC11 U PC11 control board for KA11
M7810 PC11 U Paper tape reader/punch controller
Do I *have* to use the M781 version, or can I also use the M7810 if it's
all that I can find? What is the actual difference between the two
boards?
Next: why were the backplane modules mounted at the top of the BA11, wire
wrap up, in the 11/20? It's easy to flip the thing over while it's not in
a rack, but when it's in a rack...
Some trivia: the two partial 11/20's from which this one is being built
have serial numbers 786 and 1102.
--
Jeffrey S. Sharp
jss_at_subatomix.com
Received on Wed Aug 22 2001 - 14:59:08 BST