intro, hyper7148

[Tom Hussey]

Hmmmmmm There seems to be more than one Tom on the list!

I will send you a copy of the routine I use to dump my ECMs. It works
with another as yet un-identified computer (I suspect it's the anti-lock
brakes). Will try to dig it up this weekend and send it out.

-Tom H

BTW, What is the difference between the '96 and '97 OBDII computers. I
think they should be the same, but they seem to carry different part
numbers. 

Ken Kelly wrote:
> 
> Tom,
>         Roger's got it right! The 8051 refers to 16188051, which is
> the delco # for the
> PCM used in all 95, and i think 94 LT1 engines. It appeared in Camaro,
> Firebird,
> Impala, Caprice, Corvette, and Roadmaster applications. It uses the
> same
> processor as yours, and I suspect the same Protocols. I have some data
> on the
> 96-97 Lt1 controller, and while I know it supports ODB-II, it is a
> direct pin
> for pin compatible replacement for the 96 PCM. Actually many 96 LT1
> owners use a
> 95 PCM when they modify the engine to avoid problems with the OBD-II
> tests. Many
> of the internal data locations appear to be the same. I think they
> just added
> code to the 95 software.
> 
>         Does your PCM have 2 28C512 Flash memories? If it does there
> is a good chance
> that it shares some code. If you have prom images send me the
> binaries. I will
> use them as I test my editor and see if they share data locations with
> the 8051.
> 
>         As I said earlier I would be very interested in learning the
> read and write
> protocol for this PCM. Would you share your findings with Dave and I.
> 
>                 Ken
> 
> Tom Sharpe wrote:
> >
> > How does the 8051 compare with the HC11? Faster? Bigger? 16 bit???
> There is a pascal
> > compiler for the 8051 on the web somewhere.......   Tom
> >
> > Ken Kelly wrote:
> >
> > > Tom,
> > >         I am working with Dave Hemstead on the 8051(95 Camaro
> LT1). I have currently
> > > socketed my PCM so I can read/write the Flash Memory. I suspect
> that it uses the
> > > same protocol as the 97. 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
> > > this. Dave has put together a scan tool for the 8051 and is
> currently
> > > disassembling the Prom, and I am working on the editor.
> > >
> > >                 Ken
> > >