I bought a enhanced willem programmer from mcumall heres what i did.
1. inserted my chip MX29F00-T 2. ran willem app .97ja, selected MX29F00-T as device 3. Set my DIP Position per indicated 4. I check get id it showed MATRONIX MX29F00-T so its correct 5. read the chip 100% ok, saved it to a file 6. erased the chip 100% erased, blank check 100% it said its blank 7. click on search button and click on unlock 7. loaded my rom file, clicked program 8. it stopped "ERROR at 0x01F193 Chip = 0xFF buffer = 0xC7
im sorry but i have never used a programmer before, i bought it just to reprogram my dead laptop.