Yisssss. I struggled for hours with inadequate eyesight, tools and materials, but I think I got this mod done!
My KDJ11-B is plugged into what was a stock H9273 (bc1, bd1, be1, bf1 chained straight down the backplane using four wires to be a H9276) and it runs! I've only plugged in one other board, the memory, and it shows up (4088KB as opposed to 248 KB before the Q22 mod) and seems to work for the locations I've fiddled with in ODT, but the machine's stuck in self-test at error 47, Memory CSR error. It was stopping with this same error when I ran it as a "before" test in the 18-bit backplane, so I'm guessing it's not just my mod causing the error.. What I assume is the parity light on the third party "Clearpoint QRAM-2 SPB-1 88B" lights during self test. I've found no documentation for this sucker as yet.. So unless my luck (and soldering) are terrible, I guess the years of harsh storage may have broken something in the memory because it was fine in 1999 before the power supply on the Micro failed. Heck, maybe that event burned something on the memory board, too. I'll have to find my rl02 controller and build the system up some more so I can run xxdp and find out what exactly died. Maybe it's just a bad socketed RAM. Tip in case someone didn't know: You can break out of the never ending self-test sequence by pressing crtl-O 4 when confronted with the 1,2,3 menu and move on to other parts of the ROM (I did this so I could temporarily disable the tests and get on with booting xxdp). Thanks again to everybody for the encouragement! I freaking love these machines and even this limited success feels fantastic. Stoked. You guys are the best. --jake
