And to cause a loop when the EEPROM is *not* selected one forces RST 0 onto the data bus (C7h) when /MREQ & /M1 & !/OE_EPROM. This can all be combined into a small daughter board which is meant to be plugged into the EPROM socket together with the NOP forcer. -- Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist