E40 ECM disassembly and reflash project

[dzidaV8]

Hi all!

Since I have E40 PCM powered car I was thinking about opening the platform for open source flashing. Recently I have started the disassembly work on a Impala LS4 bin file I found here.

E40 ECM has both J1850 VPW and GM High-Speed LAN (500kbps CAN, 29bit ID) capabilities, and from what I already decoded both are used by the bootloader. Looks like simmilar approach as in 0411 style PCMs is needed to transfer reflash kernel, as there is no reflash code in there.

If anyone wants to chime in and help then it would be great. I have done a lot of work disassembling LT1 and LS1 PCMs, but here the code is much more complicated with heavy pointer usage, most likely Delphi has switched to higher level language like C++ developing E40 code.

For now, feel free to have a look at and comment about the code I disassembled so far.