Thanks! Sounds like fun!

I guess any architecture documents you may have are in Git? What cross-assembler are you using? I need to find a M68K PRM too as I'm not familiar with that processor.

OH, and yes, I use GitHub.

Oh, I see... I'll take a look at the M68K stuff to see if I can figure out what it is doing... More Later.
Jim

Do you need assembler to solve time critical issues?

Assembler is a long way from C#.

I have written code in many assembly languages from Z80 to Univac 1100 mainframe, but not the pc. How tough can it be to learn. Why do you ask. (Oh, thanks for the tip. I'll google and see what I can come up with.)

antus - thanks very much for the explanation. I appreciate you taking the time. It kinda sounds like you could use more help... I have a hardware (electronic technician) background and have been building and swapping engines for years, but most recently I was a software systems analyst & develop...

pchammer reported this "black box" as a P01_P59. Not arguing, just stating what I saw on the console display. By the way, since I'm new here, what exactly is a P01 ecu. I have run into more alphabet soup with this project than any thing else I have been involved with. I have looked for lis...

It's the original blackbox pcm, removed from the gmc Yukon...