2100 at smecc

At least in my world, 2883's are unobtanium. I will check how many 7900's I have. If I have enough after refurbing them all, I can trade you a 7900A drive. A 13210 controller may be more difficult. There's a catch though - I'd rather not send a pristine 7900A that I spent a hundred hours refurbishing into a non-working environment. Let's get the other processors and peripherals working first. Once they fly, then we'll talk about a drive. By the way, you DO know you can use a 7905, or a 7906A,B,C,D don't you? The latter are common as dirt it seems. You will need a diagnostic library. There's quite a few you'd need to pass, and at least two that should be run for an extended period. If you don't have a diag lib, contact me off-list and I'll get you one on any of several media. If it was me, I'd do some serious inspection if they haven't been powered up in years. At the very least pull all cards, progold the edge connectors and backplane sockets, check the power supply (there's a simple adjustment procedure). To check the power supply you need a single board in - I think it was the IDL board, have to check. To adjust the 20v memory supply you need the machine to warm up and the setting is based on a temperature chart. I'd also check the backplane wirewrapping for damage, bent pins, etc. The last thing you want to do is just hit the power switch and pray. You may loose a set of processor cards and those aren't easy to get. You definitely don't need a "stash of 2100's" to run a system regularly. At least in my experience, the 2100's dont fail often, once you get one running well. Most common failure is an XY driver board or DC board. Get your two cpu's running well, then get one spare cpu set, and a couple spare memory boards. You should be set with that. Not yet, maybe in the future. But don't you already have two? Let's spend the time to get your existing ones working first. Jay