I need to find out if the SST 29EE020 EPROM that you use is reprogrammable. I have tried to flash an update to it, and now it doesn't respond to anything. I tried to reflash it again using an EPROM programmer, but the machine was unable to erase the info on the chip.
So, do I pretty much have a junk chip now? Please let me know what I can do. Do you provide a warranty on your chips? hehe...