13 Feb
2006
13 Feb
'06
7:58 p.m.
That would certainly be a good approach, but also definitely not the easies=
t.
Writing the required code in "pseudo language", then code in 8085 assembler=
and burn in EPROM is just one step, but you need some 50-60 I/O lines to
control the lights and read the switches. That's additional hardware ... bu=
The main problem is tha the 8085 bus is not brought off the PCB AFAIK.
You'd have to pick up the address/data by, say, plggybacking on top of
the 8085.
Once you've done that, adding the I/O ports is not hard, just 3-state
buffers for inputsn and latches for outputs.
t
I have not [yet] looked at the diagram of the 11/70 console. Perhaps you ca=
n
modify it slightly and add multiplexers to get the I/O line count down.
Not having any spare lights-and-switches boards, I was assuming you'd
make this from scratch.. Not that it would make that much difference.
-tony