[Floppertalk] Program to slow down the CPU

jleyda floppertalk@oldskool.org
Thu, 15 Nov 2001 08:48:42 -0700


> >I'm currently researching yet another method of CPU 
> slowdown, which I hope
> 
> Well don't keep us in suspense!
> 
> On Nov 2, 2001 at 11:08, Jim Leonard wrote:
> 
> >Any details on this method?  Disabling caches and the RTC is the
> >smoothest thing I could think of, so if you've got a better idea I'd
> 

well, I did some twiddling last night with this new method and got my
pentium II 400 to operate between 3 and 5 Mhz (or so my benchmark program
said).

I played an old non-throttled game last with the machine and it was very,
very playable.  I have not had the time yet to compare it against my true
8088 4.77MHz machine to see if games are more or less jerky, but I'll get to
it soon.  

I found that I could get the machine to be between 26 and 3MHz in variable
steps of about 3 Mhz.  eventually, I'd like to see this turned into a tiny
little program, perhaps even a TSR, that allows you to specifiy the speed
you want to run at.  

I've got a lot more work to do, but this was at least a promising 1st step.

-jeff!




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