+kheller2 Posted March 8, 2007 Share Posted March 8, 2007 I remember when I installed my USD that there were two versions, one for basically EPROM 1050s out of Singapore and one for Tandon ROM based boards. However, I don't see that same distinction with the Duplictor or Happy upgrades. Any reason why? I thought the difference was because of how the EPROM and the ROM were powered with different pins. Quote Link to comment Share on other sites More sharing options...
ijor Posted March 8, 2007 Share Posted March 8, 2007 Buffered enhancements (Happy, Duplicator, Speedy, etc), don't use the built-in ROM socket (the USD does). They plug-in in the CPU socket with its own board, and hence they don't depend on the ROM/EPROM pinout. Quote Link to comment Share on other sites More sharing options...
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