Any way to change FSB in Pcem?

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ovctvct
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Joined: Wed 28 Oct, 2015 3:07 pm

Any way to change FSB in Pcem?

Post by ovctvct »

I couldn't find a way to change FSB clock to allow CPU underclock or overclock in pcem, yes, I am using v10,any ideas?
neozeed
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Re: Any way to change FSB in Pcem?

Post by neozeed »

ovctvct wrote:I couldn't find a way to change FSB clock to allow CPU underclock or overclock in pcem, yes, I am using v10,any ideas?
I've done it in source to have a pentium "underdrive" clocked around 40mhz and 20mhz
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SarahWalker
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Re: Any way to change FSB in Pcem?

Post by SarahWalker »

What are you trying to achieve here? PCem doesn't really emulate an FSB that would have much effect on performance in general.
ovctvct
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Joined: Wed 28 Oct, 2015 3:07 pm

Re: Any way to change FSB in Pcem?

Post by ovctvct »

neozeed wrote:
ovctvct wrote:I couldn't find a way to change FSB clock to allow CPU underclock or overclock in pcem, yes, I am using v10,any ideas?
I've done it in source to have a pentium "underdrive" clocked around 40mhz and 20mhz
How exactly? EDIT: I found it myself.
Battler
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Re: Any way to change FSB in Pcem?

Post by Battler »

PCem has no way to underclock a CPU, PCem-X, however, now has a Turbo option which is enabled by default and halves the clock speed when disabled (so you can run a Pentium 75 at 37.5 MHz for example).
ovctvct
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Re: Any way to change FSB in Pcem?

Post by ovctvct »

Success! I edited the Pcem-x source code(the cpu.c file to be exact) to get an Overdrive at 25 MHz!
25mhzoverdrive.png
25mhzoverdrive.png (48.05 KiB) Viewed 3658 times
Battler
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Re: Any way to change FSB in Pcem?

Post by Battler »

And again, why are you discussing PCem-X on the PCem forum?
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