I believe the boards were all designed as a M8045, which was the parity model, and the M8044 was on the same artwork, just missing a few bits to make it parity.
On Fri, May 13, 2016 at 5:52 PM, Noel Chiappa <j...@mercury.lcs.mit.edu> wrote: > > From: Dave Wade > > >> In theory, the M8044-EE should be an "MSV11-DE" (not "MSV11-EE", > that > >> would be an M8045-EE), but none of my documentation, including the > >> M8044 prints, covers such a variant. > > > The back of the board says M8045 5013128DP1 32K 18bit MOS memory > > All M8044's I've ever seen say M8045 in the etch. The M8044 is the > non-parity > version ("MSV11-Dx"), and the M8045 is the parity version ("MSV11-Ex"), and > for the M8044's, they just left one row of chips out. > > >> something like a BDV11 or something > > > These all seem to have vanished from E-Bay at present. > > Paul A has (or used to have) a bunch of them. > > Noel >