As something went wrong in posting this question, I try to repost it here. please don't be offended by this. ------------------------------------------------------------------------- Hi all. is there a list of equivalents for DEC ic's? I've made a mistake in attaching our BA-8 to the PDP8/f and plugged in the ribbon cable connecting connector C and D the wrong way. some magic smoke came loose and there are a few chips broken . by comparing the signals on those connectors, I made a list of suspect chips on which some pins got-15v or +15v... The M8330 board got most of the blast, resulting in 4 burned chips, but other boards could well be affected. ----------------------------------------------------------------------- -- Met vriendelijke Groet, Simon Claessen drukknop.nl