On Wed, Feb 13, 2019 at 2:43 AM Fritz Mueller via cctalk <cctalk@classiccmp.org> wrote: > > SUCCESS!!
Outstanding! > Put the M795 out on an extender, loaded 167777 in RKBAR, and had a look > around with a logic probe. Narrowed it down to E34 (a 7430 8-input NAND). > Pulled, socketed, replaced, and off she goes! > > I can now successfully boot and run both V6 Unix and RSTS/E V06C from disk. Nice. I have had an RK11-C for a long time that I've never tried to power up (I got an RKV11-D and used that on Qbus machines instead). The saga has been interesting for me as I contemplate getting mine working in the next couple of years. I had to look up the M795. I had forgotten there was one dual-height module in the entire controller. It's interesting that it was a bad 7430 in yours. I find that for equipment of that vintage, my usual suspects are failed 7474s and failed 7440s, probably 80% of the total. Behind that, it goes 7420s and then maybe 7430s. -ethan