Hi Gang: I just returned from the local university junk sale, and acquired (among other detritus) two Q bus boards. They are made by (apparently) USDC, model number 1101, revisions "01" and "BG". The chips are marked circa 1982. They have a Z80, som EPROM, a couple of PALs, and a 40 pin IDC header. They are half-height boards ( i.e. two sets of fingers). "LSI-11 Host Interface" is silk screened onto the board under the part number. Can anyone tell me what these are? They came out of an 11/23 box badged 11-DM4, althought the box is in the truck and I may have the DM$ slightly incorrect. Thanks, Kevin -- Kevin McQuiggin VE7ZD mcquiggi(a)sfu.ca