OK, thanks, Glen, i didn't think of that! Not sure why they would do that with all memeory on-board!
One thing I though of was just buying some IDC 36-pin card edge connectors and wiring them together for the work bench! cheers, Nigel Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU Amateur Radio, the origin of the open-source concept! Skype: TILBURY2591 nw.john...@ieee.org On 2021-01-30 6:08 p.m., Glen Slick via cctalk wrote: > 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.