So, does anyone know of any documentation (especially engineering drawings) for the M8728, which is the 256KB board for the MK11 (originally), also later useable in the VAX-11/750 and VAX-11/730? The M8728 and M8750 are in fact the same PCB, with different DRAMs (16K or 64K) and different jumper configurations, and since M8750 prints are extant, most of the M8728 is documented, but the M8728 also has some discrete components that the M8750 lacks (I think to produce voltages used by the earlier DRAMs that the later ones don't). Yes, I could work this all out by tracing leads, but I'd rather not! I have produced a table of all the jumper differences, etc and will be creating a page to document all this, but actual documentation for the M8728 would be helpful. Noel PS: Does anyone know the formal names for the M8728? The 64KB board, the M7984, is the MS11-K, but I don't know the one for the larger one (if it was ever assigned). The M7850 seems to be called the MS750/MS730 (per the prints).