PDP-8/E Keys & Switches

[PhilB]

It's now 28 years since I last fingered the front panel on a real live
PDP-8/E and I have been trying to regain some of my lost youth by building a
front panel/simulator similar to the system described by Henk Gooijen at
www.pdp-11.nl/homebrew/pdp/pdp8&startpage.html

I would be grateful if someone with a real front panel could tell me which
of the switches on it are 'keys' (momentary contact) and which are
'switches' (fixed position). My greatest confusion is with the 'Single-Step'
and the 'Halt'. The Small Computer Handbook of 1972 says they are switches,
yet the Hardware Maintenance Manual says they are keys. Can anyone refresh
my memory please?

Regards,
Phil.

[Chuck Harris]

DEP normally down key
EXAM normally up key
CONT normally up key
CLEAR normally up key

ADDR
LOAD normally up key

EXTD
ADDR
LOAD normally up key

All the rest are switches.

-Chuck

[PhilB]

"Chuck Harris" <cf-NO-SP...@erols.com> wrote in message
news:aLidnbNsT5I_gX3a...@rcn.net...

Excellent - many thanks Chuck.

- Phil.