m509v544.hex is for the 12c509's 4 wire
m509v545.hex is for the 12c509's 5 wire

m508v544.hex is for the 12c508's 4 wire
m508v545.hex is for the 12c508's 5 wire

The file Flawfix.hex is supposed to fix the 
bad prog files, not worked for me :(

The m508v54f.hex is the file you need for
12c508 chips with date codes between
9813 - 9830, DON'T USE THIS FOR DATE CODES
OUTSIDE THIS RANGE.

The above code works great on:
12c508 between the above dates.

