Could you send me a soft copy of the programmers reference manual or can I download it?

Did anybody already read out the bootloader ROM of the two MCUs? Is there any interesting stuff inside? Of...

Now I have a quite good understanding of how it all works theoretically in this type of PCM. That special config register is in EEPROM, so I think it does never change. GM decided how they want to...

Ok, I just had a look at the CONFIG register, that seems to be contained in the BIN file at $103F, the value is $0B, means 00001011b, so EE0 to EE3 are all zero, so EEPROM location is:
$0E00 – $0FFF...

Maybe the config register is also somewhere in the BIN? The config register tells where the EEPROM is mapped to. Per default from the data sheet it's $FE00–$FFFF.

It is for sure, that the bin...

Robert do you know the address ranges in the bin, that are used for which "data source" in the PCM? Is there data in PCM that cannot be accessed via ALDL? And how about writing? Which parts of bin...

A Tunercat bin file contains the VIN (ASCII encoded, so easy human readable) at $e24
But I've never tried to change it and check if it really gets written into the PCM.

Thanks for that info. Was the schematics of the two boards already reverse engineered ? Maybe there are even chips holding data that are not mapped to the BIN file. It also would be very interesting...

I am also interested in understanding the $EE code and had a look into the bin just with a text editor. There was some speculation about what T and E side means. i would say:
Time side and Event...

Try PCMcomm first. Some years ago I wanted to log my 95 vette and had no luck with TunerPro. By inspecting what PCMcomm has put to the line I adapted it for TunerPro and got it work finally. But what...