GM ECU Info

[peter paul fenske]

Dear Ross

The old C3 C4 whatever is based on a 6801 and you can use
a HC11 disem on the code if you like.

Rom data is rather simple compared to newer models.

If you want a dump of a 90-92 let me know.

Could keep you busy for a long time.

As for the 82S181 I made up a adapter to read it.
I suppose you could make up and adapter to use a 2732 EPROM
rather easily. Cover might not fit. You could always
cut a hole in the kickpanel and leave the cover off to make
quick prom changes.

There are quite a few emulators available on the market.
They start at about 200$ US. These will allow you to
change variables on the fly.

Also have a good read through the DIY archives. Lots of good 
reading.

Oh and look at the Buick GN page. Lots of stuff on their eprom
which uses about the same TCC config.

GL with the Cease Fire:peter
At 10:23 PM 4/22/97 +0000, you wrote:
>Hi folks,
>
>Not a very original subject title, but hey.
>I have a GM ECU # 1226026 (used on 83 Cross-Fire TBI).
>It uses a 82S181 BPROM for the fuel maps etc.
>
>I was hoping one of you wizzes out there may be able to give me the 
>following info -
>
>What processor is it based on - 6801, 6809 etc.
>Can anyone decipher the ROM data, I've read it off.
>Along those same lines, I'm not so much interested in the fuel/ign 
>maps, more the T.C.C lockup control. (anything will do though).
>Was this ECU used in any other engine combos?
>Ignoring the recent ALDL discussions, what comes out of this one?.
>Is there an emulator which will act like a 82S181 BPROM, (these 
>aren't eraseable, so it's going to be expensive to experiment 
>otherwise).
>
>Thanks
>
>Ross Myers
>
>
>