25 Sep
2014
25 Sep
'14
11:43 a.m.
On Sep 25, 2014, at 2:33 PM, Simon Claessen <simski at dds.nl> wrote:
Hello all,
The pdp8/f we got last week is working now, after forming the capacitors on the lineair
powersupply and testing it with dummyloads. there is a 8kword and a 16kword corepack in
the machine. we would like to dump the contents of the core to serial to preserve the
original contents for later examination while we can to tests with the machine.
is there a way to do this, using a empty part of memory and a M8650 uart?
One way would be to wiggle the console switches under program control, as the CHM PDP-1
team did according to an article from a few years ago.
Another would be to find, or write, a simple memory dump program, and load that in a small
bit of memory that you have previously saved by hand (from the console switches/lights).
I don?t speak PDP-8 assembler, but I imagine such a program wouldn?t be more than 30-50
instructions total.
paul