On Sat, Jan 30, 2021 at 2:20 PM Nigel Johnson via cctalk <cctalk@classiccmp.org> wrote: > > Yes the BA11S would be too big. Can't see why not for the 11/03 chassis. > I used to make a good living upgrading 1/03 chasses with four extra bits > for the 11/23/73 (Hmm, where is my old stock of W933 bus strip!) > Always works except in the MINC laboratory system, which used those four > pins for module identification. > > Since all the memory is on-board with the 11/93 I don't think it would > make a difference unless DMA used, and I don't plan to go that far! I > could always wire-wrap them.
The KDJ11-E 11/93 has PMI signals on the CD connectors, so you need a Q/CD backplane, such as the 18-bit 4x9 H9273, the 22-bit 4x9 H9276, or the 22-bit 4x8 H9278 (BA23 backplane). The 4x4 H9270 is a Q/Q backplane, so that would cause a conflict with the PMI signals on the CD connectors of the KDJ11-E 11/93.