intro, hyper7148

[Ken Kelly]

Tom,
	Yes with a socketed PCM, I can always recover. What do I
need in a test setup to test your code? I have a socketed
PCM, but need to put together a test Bench for it. I have
been trying to get a couple of the connectors for this PCM.
I have to get after GM again on that. I have a prom
Programmer and a couple of Spare 28F512's. DO you know which
of the chips should have your code? The delco chips are
commented as EVENT SIDE and TIMER SIDE.

			Ken

Tom Hussey wrote:
> 
> Ken,
> 
> > Since my PCM is now socketed it is a very safe place to
> > test a read & write program. I am working on a prom editor for the
> > 8051. It has
> > two 28F512's labeled EVENT SIDE and TIME side. Maybe we could work
> > together on
> 
> Sure.
> 
> >From what I have seen, the hardest part will be figuring out the TIO. IC
> Delco has a page on this and gives electrical parameters but no register
> map, programming info or pinout. Your socketed ECM may be just the
> thing. I will write some code when I get a chance if you would run it?
> 
> One thing I found that may be of interest is the manner that the ECMs
> provide redundant input and control. For example the MC33291 that is
> used to drive solenoids and lamps is on the SPI bus. The event checks it
> and can control it in event of the timing computer going down (some sort
> of limp mode). Also found code where if an a/d gets strange results the
> a/d on the other board is used to provide that signal.
> 
> -Tom