weird question I think

[Roger Heflin]

On Tue, 3 Nov 1998, Bill the arcstarter wrote:

> Jim wrote:
> >Is there an inexpensive way to make a PC simulate a chip, say a prom 
> reader
> >that passes through a PC on the way to the ECM. You load the rom code 
> into the
> >PC, and the PC simulates a prom., that you could modify parameters to 
> see what
> 
> Yea, look for something called a ROM emulator.  Its a box with a cable 
> coming out one end which attaches to your ECU (or whatever).  You 
> download the ROM code image into this box and off you go!  But I'm not 
> sure how much time this will actually save, and they usually aren't too 
> cheap either.
> 
> -Bill

They would not save any time.  If you actually knew enough about the
car to make an accurate simluator of the entire engine, then you know
enough to get pretty close to it the first time.  The guy that burned
my prom got it pretty close in 4 tries.  Considering that I can
replace the prom in  about 5 minutes and burn it in about 5 minutes,
with the car testing probably you could get it down to less than 30
minutes a version.  That is with practice.

				Roger