<I doubt that any of the old stuff I have, much of which, incidentally is <older than the 21-year-old to which you referred, will run at that 10MHz It's not as old as the altair or some of the other goodies like the MDS-800 that was part of the VT100 development. What makes it significant is it's still in use! <rate, though I once used an ordinary Z-80A at 12 MHz with a BUNCH of 2147' <(that's power-hungry, basement-heating, fast, static RAM). Unfortunately, Yep, used them also, 2167s (16kx1 45ns) were available to me and they were nicer. <almost no peripherals would talk to it without half a dozen or so <wait-states. That was in a hand-wired application and not in an S-100, <where, although you can interface the processor, RAM, and ROM with just a <gate or two, the bus interface takes about a hundred. (not really, but quit <a few!) On a good day about 14 each board. <If I go the route of hand-wiring something for the S-100, I'll probably us <one of the WD1002-series bridge controllers I still have lying about. I They work well or the old ISA-8bit controllers. <About ten years ago, Someone gave me several of the XCOMP STS board pairs, <but tuned for 8" rather than 5.25" drives' data rate. I imagine they spen <a lot of time in someone's desk drawer, in order to keep the boss from <learning he'd paid for yet another item they couldn't use. Those might be <interesting to try out. They may be interesting if the caps havent died of old age. Allison