Links

PCM Hacking . Net -- Where the action is.

Dimented24x7's initial investigation into the 411 PCM -- His account went silent a couple years ago, but this is really where it all started.

Operating Systems and PCMs -- Just for reference.

Find the latest operating system ID and calibration IDs for any GM VIN -- You can put in your own VIN, or you can first do a web search for a year, model name, and the word "VIN" to find a sample VIN.

Implementing J1850 VPW on a PIC -- If you want to implement from the ground up for another microcontroller, this might be a good reference.

OBD2 PIDs and conversion information -- Because it helps with reverse engineering, and the next thing on the to-do list is a data logger.

VPW protocol details -- This was very helpful in the early days of the project.

Where you once could get an AllPro USB adapter. -- For a while it seemed that these were the best hardware to use with PCM Hammer. And then they went out of production. :(