kishy
Veteran Member
This may have come up before but I don't know what the heck search terms to use to find it.
I have the 256-640k version of the IBM PC/XT 5160 motherboard. On it, near the ISA slots, there is a small knob (potentiometer?).
Counting from the top it is 2 slots down on the left.
What is this knob for? Is this a primitive method of over/underclocking the bus speed? My thought is perhaps it clocks the bus speed down to allow proper card operation if you want to use a faster CPU (or something like that).
I have the 256-640k version of the IBM PC/XT 5160 motherboard. On it, near the ISA slots, there is a small knob (potentiometer?).
Counting from the top it is 2 slots down on the left.
What is this knob for? Is this a primitive method of over/underclocking the bus speed? My thought is perhaps it clocks the bus speed down to allow proper card operation if you want to use a faster CPU (or something like that).