Anyone remember what is needed to get valid memory reads on the 8080 boards? I seem to recall one has to set the gates to a state prior to doing a ROM test, but can't recall the process...perhaps someone has a script they can share? At the moment the RAM test works fine, however any ROM space that has FF in it - on the high memory area (FFXh) gets random garbage inserted from the injection of some clock info on the data buss. The valid data locations in the ROM dont' appear to be affected. Tried adding a pullup resistor bank, no change. No ROMs, no change... Thanks! John :-#)# -- How to subscribe or unsubscribe from TTL http://seven.pairlist.net/mailman/listinfo/techtoolslist _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/