19 Jan
2010
19 Jan
'10
8:59 p.m.
And would a
PC04 do the job?
There's the PC04 and the PC05 - IIRC, the PC04 _is_ the
PDP-8-compatible version and the PC05 is for the PDP-11 (differences
in what cards are loaded in the PC0x card slots, not with the
mechanicals). The PC04 (plus the M705, M710, and M715) should be what
you need for either the -8/i or the -8/L (no differences there). from what I can tell). Theres the minor issue of the
no/off swtich for
the punch motor (fitted on the PC04, not on thr PC05 btu
that's easy to
change)
ISTR folks have been able to migrate a PC04 to a PC05 or perhaps it
I've turned a PC05 into a PC04 (to link to a PC8e card in my PDP8/e). It
was mostly a matter of re-wrapping the backplane in the PC05 chassis -- I
think I needed one flip-chip card to provide a NAND gate (but you could
hardware a '00 in the wirign if you had to.
was the other way. I've had no need to do either
one, but in
principle, if you have all the right parts (I think one model needs
punch driver cards (M040? K040?) and the other model does not), you
can make a hybrid high-speed punch/reader that can connect to either
controller with a minimum of changes.
I know I pulled the control logic cards and added them to the box of
spare fli=chips. I think I left most, if not all, of the wiring
undisturbed (there are enough spare slots on the backplane blocks to be
able ot plug the cables and NAND gate flip-chip into unwired slots, so I
could leave th wirign to the original slots unchanged). So going back
mioght bust be a matter of pulling the NAD gate card, moving the cable
connecotrs, and plugging the control cards back in.
-tony