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Blinding fast PDP-11 Simulator
I found another PDP-11 simulator on the web that
is orders of magnitudes faster than Bob Supnik's simulator. You can find
it at http://www.dbit.com (it's called
ersatz11). They sell it commercially, but it is free for personal
use. It runs under DOS and Windows 95. This simulator runs on my 200
Mhz Pentium as fast as a real PDP-11/70, possibly faster. It also has some
nice features, such as it picks up the date and time automatically from
DOS. So when you boot RSTS you don't need to keep entering the date and
time. It also seems to recognize more memory than Bob's simulator.
RSTS never seems to recognize more than 124K under Bob's simulator, but on
ersatz11 RSTS recognized up to 300K. I think it also use real-time clock
interrupts to generate the simulated interrupts.
I did a SYSGEN and it compiled and built in
about 1/5 the time.