Please read fully, before answering. Have already had two slows post useless answers.
I'd like to increase the voltage going to my 386 (because i am raising the clock speed at the same time, for overclocking).
My initial thought would be to try raise the 5v rail (as 386/486 are 5v), to 5.1 or 5.2v.
However on second thought, there would most likely be a small regulator inline with the CPU to ensure it receives 5v no matter what the conditions.
Any suggestions?
I'd like to increase the voltage going to my 386 (because i am raising the clock speed at the same time, for overclocking).
My initial thought would be to try raise the 5v rail (as 386/486 are 5v), to 5.1 or 5.2v.
However on second thought, there would most likely be a small regulator inline with the CPU to ensure it receives 5v no matter what the conditions.
Any suggestions?
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OK Sunshine, Captain Slow #2 is back and he's been through 20 overclocking sites looking at 386 overclocking and a couple of 386 datasheets. Conclusions as follows:
1. Overwhelming opinion of the Overclocking community on overclocking the 386 is "you can but why bother?"
2. Your obsession with Vcore. There's no VID instruction in the 386 instruction set so you can't do it that way, you can only take the Vcc up to the maximum recommended of 5.25V. So short of taking the lid off the chip and using a probe it's just not freakin' do-able.
3. You will have better luck with an AMD 386DX-40 than with an Intel i386. A crystal change and perhaps a little extra heatsinking but in most cases even the extra heatsinking isn't necessary. Any further tinkering will be severely restricted by the 386 mobo so short of your own custom daughter board (and they are fraught with problems trust me as I've done work on 486 and Pentium replacement processors with piggy back socket conversion boards) you are going to be stuck with increasing the oscillator frequency. Increasing the processor voltage above 5V makes next to no difference and is futile and unnecessary.
4. AMD BIOS tends to work better than others as far as increased speed is concerned.
5. Make sure main the memory and L2 cache chip speeds are up to the speed increase.
6. Don't make disparaging comments about contributors who have answered your questions even though the answers may not be what you want. It's not nice, not helpful and against Y!A community guidlines. You could easily get yourself a violation for a comment such as your "slow" comment from less tolerant contributors.
1. Overwhelming opinion of the Overclocking community on overclocking the 386 is "you can but why bother?"
2. Your obsession with Vcore. There's no VID instruction in the 386 instruction set so you can't do it that way, you can only take the Vcc up to the maximum recommended of 5.25V. So short of taking the lid off the chip and using a probe it's just not freakin' do-able.
3. You will have better luck with an AMD 386DX-40 than with an Intel i386. A crystal change and perhaps a little extra heatsinking but in most cases even the extra heatsinking isn't necessary. Any further tinkering will be severely restricted by the 386 mobo so short of your own custom daughter board (and they are fraught with problems trust me as I've done work on 486 and Pentium replacement processors with piggy back socket conversion boards) you are going to be stuck with increasing the oscillator frequency. Increasing the processor voltage above 5V makes next to no difference and is futile and unnecessary.
4. AMD BIOS tends to work better than others as far as increased speed is concerned.
5. Make sure main the memory and L2 cache chip speeds are up to the speed increase.
6. Don't make disparaging comments about contributors who have answered your questions even though the answers may not be what you want. It's not nice, not helpful and against Y!A community guidlines. You could easily get yourself a violation for a comment such as your "slow" comment from less tolerant contributors.
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