overclocking older processors

that? I've just sent EK-78032-UG, basically the 78032 User Guide over to DFWCUG. You can see the gory details once it arrives and they put it up. In the meantime, from Appendix A, clock period is variable from 25ns to 250ns i.e. 40MHz to 4MHz. It specifically states (somewhere) that the part will *not* work down to DC. The clock should be held in the high and low states for 16ns each, so even with infinitely fast rise and fall you cannot do better than 32ns and stay reliable across all parts and all temperature ranges. Now if you are willing to restrict the temperature range and hope to work on just *most* parts, who knows :-) Tweaking a MicroVAX II won't buy you much. I doubt you could bump the clock by much more than say 20% without something going horribly wrong. And the uVAX II is a fairly well balanced system: the memory cycle is just about right for the CPU (I think it works out that the CPU cycle time matches the memory cycle time - hence no need for cache). So if you up the CPU clock, you need to find some way to speed up the memory otherwise you don't even see your modest 20% gain. Antonio