Originally posted by: RetroHackerI am firmly of the belief that the data on these prototype games should be backed up - and backed up well. Once the data is gone, it's gone forever.
That said, there is a "trick" to reading partially bit-rotted EPROMs... read them at a lower voltage. If you power the chip with 4v instead of the usual 5, you have a better chance of getting data from "weak" gates. Not a definite science by any means, but, like putting a failed hard drive in the freezer, it sometimes works - and you have nothing to lose.
-Ian
How would you go about adjusting the voltage on a typical EPROM programmer? I would love to give this a shot on some of my more haggard prototypes.
