Reading and writing to a VCM on the bench

Hello,

I am sure there is an answer to this somewhere, but I am new to this site and couldnt find an answer. If I wanted to read/write a computer while its not installed in a vehicle, what are the minimum connections I will have to have. To clarify, I am working on a 320 pin PCM P/N 12200411 or similar. I have lots of connectors and junk harnesses laying around to work with.

I know I will need the powers, grounds, key on power, and the wires between an OBD2 data link connector. I have access to alldata and can find the wiring diagrams I will need.

I just didnt know if there was anyting else I will need to have hooked up.

Is this how people do the mail order VCMs?

sloppy mechanics bench harness, just built one myself , i think they are only 160pins?

https://sites.google.com/site/sloppy...-bench-harness

Thank you wery much for the info, I appreciate your help