+Omegamatrix Posted April 21, 2008 Author Share Posted April 21, 2008 The third is exactly like the first, except all unused bytes in the ROM have been changed from 00 to FF (in other words, probably was read from an EPROM as it is faster to program FF than 00 for unused bytes). You are right. That is all that is different. Crystal_Castles_Comparisons.zip If it is a proto then it is the finished version. It could have been read with an eprom burner as a lot of protos (that I have seen photos of) are socketed eproms. So someone could have dumped it that way. Then again it might my dumper is just leaving $00 in that space as it is for ram? Eckhard would know. Maybe the roms are one and the same depending on how you dump them. They seem to be functionally the same. Quote Link to comment Share on other sites More sharing options...
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