[Gmecm] '730, '749, '727 EPROM image/memcal compatibility?

[rawardsr]

Tomas J. Sokorai Sch. wrote:
> I've been reading a bit about these ECMs, and I have some doubts:
> 
> Can I interchange the BIN image of any EPROM from that ECM family to any other 
> ECM from that family, and expect to run with the pinout the new BIN's 
> original ECM had?

For the most part, yes.  At least with the 727 and 730.  The 749 is 
somewhat different with having the second injector driver circuit 
populated, but has a quad output driver left off.
> 
> What if I have a 32KB ECM, and I want to burn a 16 KB image from other? Just 
> double the 16KB image?

That all depends on what size eprom you are using.  Since I use a 32K 
eprom, and use 16K code, yes I either double the bin file to 32K or 
place it (16K) into the upper half of the eprom (start at $4000).


> And the resistor network from a very different app? what happens if I want to 
> use a memcal from a 8cyl to make a 6cyl adaption or even 4cyl? (I don't care 
> about the detonation sensor filter circuitry).

Not recommended.   Bob