13 Jan
2013
13 Jan
'13
2:29 p.m.
Very cool! There was a PDP-9 at Purdue University back in the day. What
is the origin of the machine which is being restored at the RICM?
On 1/13/13 1:11 PM, Michael Thompson wrote:
The PDP-9 will now execute the built-in diagnostic
described section
3.7.7.3 of the maintenance manual. This diag copies the contents of
the AR register go through the ADR to increment the value, then to the
MB register and then back to the AC, AR, and PC registers. This means
that much of the I/O bus logic, the CP timing, the registers, the ADR,
and the Control Memory is working. Now we need to fix the core memory
controller and start debugging the rest of the processor and I/O.