24 Jan
2013
24 Jan
'13
6:17 p.m.
On Thu, Jan 24, 2013 at 09:07:43AM -0600, Roe Peterson wrote:
At poweron, the system starts the M9312 console
emulator software; I
can use it to deposit a small program into memory with no problem.
Attempting to use the "S" command to actually start the program
causes the RUN light to come on; the program never executes, hitting
CTRL/HALT on the front panel causes BUS ERR, the RUN light stays on,
and the only way to regain control of the system is power off. For
example:
@ L 1000
@ D 000777
@ L 1000
@ S
If I knew how to debug the 11/34a front panel, then *I* wouldn't have
similar problems with CNTRL/INIT etc. causing unwanted results. **But**,
if you're talking to the M9312 serial console, then you already *are*
executing PDP-11 code, so the "run" light should already be on. So maybe
whatever's driving the LED is confused but the CPU itself is executing
code more or less OK?
John Wilson
D Bit