switching between EPROMS

[John Faubion]

> You could also buy a ROM simulator, and just change the needed values. I
> have the DATAMAN S3, and it is a bit overkill, but you can plug it into a
> byte wide rom socket, and change blocks of memory if needed. You could
also
> get a low cost plug in simulator, and use a laptop to change much of what
> you need. 

Sandy since you mentioned this, do you (or anyone else for that matter)
know of a ROM simulator for the 27512 or 27C512 ROM? Maybe something to run
off a serial or parallel port? It looks to me like this would be the
easiest way to hack the code on the GM ECM. 

John Faubion
jfaubion at beaches.net