Programmer shield for Arduino Mega to read 27C256 or 27C512
For Simple EEPROM Programmer shield for Arduino Mega
Dear Sirs,
I needed "Simple EEPROM Programmer shield for Arduino Mega",
even it was designed for 28c64, 28c128, 28c256, and so series eproms.
I had problems to read AMD27C512@DIP28 chips with my other
programmer, which claimed that those chips were all faulty
and thus unreadable.
I edited eeprom-write_0.02.zip program.
a version for chips TMS27C256@DIP28 to test the programmer read option.
and another version for chips AMD27C512@DIP28, which was my final goal.
And I was really able to read AMD chips.
The only changes was to remap the address lines - just a little bit.
My basic idea was that I could (maybe) easyly change the read-out timing signal,
but that was unnecessary.
cheers rauno lauhakangas
