2 Nov
2016
2 Nov
'16
8:39 p.m.
On Wed, Nov 2, 2016 at 7:20 PM, Jon Elson <elson at pico-systems.com> wrote:
Yup, in fact, I think you could turn a PDP-5 into a
PDP-8 with about 25
boards
(one tray of system building blocks) and some wire. Mostly, add an
electronic
instruction counter register and alter the instruction fetch logic to stop
accessing
location zero. That's the only difference visible to the programmer, I
think.
And changing the interrupt location, which IIRC was 0001 on the PDP-5.