Thanks for the info!

I figured anything I need from the memory controller I'll patch, hopefully with some kind of shielded wire. I'll be trying to keep all the signal, data bus, address bus and patched memory controller lines exactly the same length.

I'll have the 32 data lines, 32 addressing lines, plus power & ground from the PDS, leaving just four lines remaining to patch to the Daughtercard on the PDS Adapter Cards "sockets" from the memory controller . . .

. . . unless that multiplexing scheme rears its ugly head and bites me onna' @$$!!!!. :-/

I've got a SIMM Saver Card for the "reversing" of the design. It makes four 30 pin SIMMs compatible with a 72 pin SIMM socket. It's a very simple funnel array, so I'm fairly sure I shouldn't have any trouble turning the tables on the design.

LOTS of research to do on both SIMM types, the memory controller signals . . . and now buffering! :

Expect LOTS of questions from me as I go about this hack, trag! :approve:

It's a lot of fun tackling a memory card hack again after 20 some years! [] ]'>