MattisLind
Veteran Member
You could shorten the bus if you like by putting the M930 in the last DD11-B into the the CPU backplane where the M920 jumper goes.
But in any case there should be some activity when toggling switches. This usually means that there is something broken. The frontpanel is controled by the microcode, so if the microcode isn’t running there will be no front panel operation.
You write ”No activity”. Does this mean all LEDs are black?
I would start checking the data multiplexing circuit in the front panel itself. There is a clock that should tick and scan the front panel. Everything is well described in the manual. The schematics will be of great help.
But in any case there should be some activity when toggling switches. This usually means that there is something broken. The frontpanel is controled by the microcode, so if the microcode isn’t running there will be no front panel operation.
You write ”No activity”. Does this mean all LEDs are black?
I would start checking the data multiplexing circuit in the front panel itself. There is a clock that should tick and scan the front panel. Everything is well described in the manual. The schematics will be of great help.