OK, I've got a request for help with buzzing a csome connections an one of the two machines I don't have that use the MDU Memory Controller ASIC:

on the IIci & SE/30 there will be a square, 128pin, Quad Flat Pack IC between the CPU and Memory Banks A&B, that's MDU

Pin 17 of MDU is connected to pin 19 on the SIMMs in Bank B - RA10

Pin 16 of MDU is connected to pin 19 on the SIMMs in Bank A - A10 - Yes or NO?

Pin 13 of MDU is connected to pin 24 on the SIMMs in Bank B - RA11

Pin 12 of MDU is connected to pin 24 on the SIMMs in Bank A - A11 - Yes or NO?

WAG:

Please check to see if pins 4,5,8 and 9 of MDU are connected to anything in either SIMM Bank and if so what pins?

Anybody got a hopelessly DOA IIci or SE/30 board to trade for some trinket in my hoard? [)] ]'>