I ran accross two posted Bin files that GM had included in what (They say) was a street legal conversion kit for a ZZ-4 crate engine into 3rd gen camaro.
I'm very interested in looking at the 3d timing tables GM worked out for the ZZ-4.
They said it was for a 1228079 ECU used with LG4 & L69s engines.
I've searched the internet for 1228079 ecu files, to use with winbin, tunerpro, etc. but can't find any 1228079 listings.
I have Tunercat (and some ecu masks for vette's) but can't find anything that looks like 1228079 on their site.
The ZZ-4 files are posted on Craig Moates (stock bin) site as.
ZZ4_CCC_ESC_24502456.bin
ZZ4_CCC_NOESC_24502457.bin

Any help or direction to look in? Thanks

 

Take a look here:
http://www.thirdgen.org/techbb2/show...hreadid=240443

And then do a search for that ECM # in the TGO PROM section. Seems that these bins were for a CCC engine.
That ECM appears to be even older than the 870 antique.

HTH

 

Thanks DoctorJ,
I've been "over there" at thirdgen, and followed that thread before.
All I could find was a 8079.SRC file, which I assume is the source code?
I have no idea how to view it
I've been modifiying & programming my own proms using Tunercat for sometime, but I'm not a programmer by anymeans.

 

That .scr file is a text print-out of the code written on the chip. Open the file with any text editor and it should
be viewable.

Whoever made that file was kind enough to put comments on the original Assembly code (in English) to identify
what each line of the code is doing. Commenting code like that is no small task

I only looked at it briefly, but the main spark tables seem to start around location 3037; and what might be fuel(?)
starts around ~3300.

The tables were left in (a much simplified version of) their original programming format, which means the table
numbers are in hex. To put them into a readable form, like you see in TC, you need a hex-to-decimal conversion.
Do a google for a free converter program - I found one from 'LiveBat' that works pretty well.

Then look at the table entries of the .scr file- where you see a phrase like "FCB $16" it means there is a numeric
value in the table. Plug the "16" (8-bit hex word) into your converter prog, and it will show you that 16 in hex = 22
in decimal numbers. Do that for each FCB, put the result into rows & columns, and that is your table.


It should make sense after you play with it for a while - if not, ask questions. There is nothing intuitive at all about
machine language (like Assembly), but it can be whipped into something comprehensible with enough time & patience...

HTH

 

Argggg...
That was to easy, I should have known that was a text file!
Thanks
Not to interesting though, just 600 to 3600rpm table.
Very linear, and not to developed.
Looks like they just simulated an old centrifugal distributor curve.
Thanks again.