MasterFygar
Well-known member
What is the current method of choice for backing up EPROMs without messing up a board? I have an as of yet publically undumped board with a TMS JL 27c020-12 EPROM and a M27C256B-12F1 EPROM and I'm a bit terrified since from what I understand EPROMs last 10-20 years and this one is 19 years old. It also goes to a redemption game so it's not like anyone else is going to copy it into MAME or anything... I have sources for backup chips themselves but I'd hate for the programming to be lost and for these to all become unplayable one day.