25 Sep
2014
25 Sep
'14
3 p.m.
On Thu, Sep 25, 2014 at 11:43 AM, Paul Koning <paulkoning at comcast.net>
wrote:
On Sep 25, 2014, at 2:33 PM, Simon Claessen <simski at dds.nl> wrote:
Or a logic analyzer with enough trace memory; hook it up to the front panel
memory address and contents display. Step through memory with the console
switches, recording the data in the logic analyzer, dump the analyzer
traces to a computer, reformat....
-- Charles
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