this is a continuation of a previous thread: http://www.gearhead-efi.com/Fuel-Inj...-EEHack-update

Made a new flash tool that surpasses the one built into EEHack, it's currently in beta and needs testing by people who don't actually rely on their LT1 to go to work in case something goes wrong, but i'm pretty confident it wont.

Flashhack is a completely free-as-in-beer next-generation tool for flashing older GM ECMs that allows you to read and write your calibration data quickly and safely with common affordable hardware. Right now it only reflashes $EE (8051) LT1 ECMs but it’s built with other ECMs in mind.

This is intended to replace and surpass EEHack’s built-in flash tool, which worked and had a reasonably low failure rate, but was a total nightmare of cobbled together spaghetti code and handled some failure conditions badly.

Flashhack’s main goal is maximum stability and speed, and seamless error recovery, making it very unlikely that you could permanently brick an ECM due to a malfunction.

It uses persistent kernels and logic to ensure that if your ECM still has ignition power, you can try to flash again until it succeeds, even with a different computer and ALDL interface. If the ECM itself loses power, there is only a small window of approx. 7 seconds (between the erase cycle and the first few write blocks) where an ECM power failure may cause the ECM to become unusable. If a power failure occurs during 98%+ of your write operation, you should be able to start over.

Unlike other flash tools, clicking buttons or doing other things like browsing the web while the flash is in progress should not brick your ECM. The worst case should be restarting the program and writing again.
download current version and get more info here:

http://fbodytech.com/flashhack/