11 Feb
2008
11 Feb
'08
5:56 a.m.
On Mon, Feb 11, 2008 at 06:38:35AM -0500, Dave Dunfield wrote:
Add to that - stuff in an EPROM full of NOPs ... Makes it very easy to
trace the address bus (it just increments).
Good idea
To the OP: Once you do figure out the address/data bit
mapping (assuming
it's not "normal"), I can give you a utility I wrote which will read an
Intel or Motorola format download file and rearrange the data / address
bits according to maps you provide. Figure out the mapping, read the EPROM,
run this utility to "fix" it and you should be good to go with a
disassembler or emulator.
Oh, I figured out the mapping after looking at the PCB for about 10
seconds ;-)
Now the fun starts - working out how to emulate the hardware. I've a
rough idea of where the keyboard matrix and the display are mapped...
Gordon