pdp11/93 mod

On 05/30/2013 03:09 AM, Holm Tiffe wrote: The biggest thing with that kind of speedup is first its a trivial amount and the other is if you go too far system reliability will be poor and show up as unexpected crashes with known solid software (data errors). That said I've pushed the clock on 11/23 board once too see and the 13mhz clock was wound up to 25mhz using a external source. I started seeing errors above 18mhz but they were random, seems bus timing and memory timing all had to be happy and I was pushing the margins. I eventually put in a clock module for 15.8mhz as I had one. For that it was a modest speed up as the 11/23 is slower to start with. Generally overclocking is problematic because the system timing is based on it and there may be items other than the CPU that have lower limits. Allison