Looking for Jumper Settings/Manual for Motherboard "Expen Tech MB-586-IT/CMD 646"

  • Thread starter Thread starter Tom Trulley
  • Start date Start date
T

Tom Trulley

Hello!

I'm looking for a manual or the jumper settings for the above
mainboard. I want to set up the correct CPU speed after I changed the
CPU.

The board is a board with ISA and PCI slots, uses PS/2 FPM or EDO RAM
modules and I used a 100 MHz Pentium-S CPU. Now I want to set it up
for a 200 MHz Pentium-P54C CPU.

Anyone know the jumper settings for this board? The manufacturer
"Expen Tech" doesn't seem to exist anymore (or hasn't any website).
 
I'm looking for a manual or the jumper settings for the above
mainboard. I want to set up the correct CPU speed after I changed the
CPU.

The board is a board with ISA and PCI slots, uses PS/2 FPM or EDO RAM
modules and I used a 100 MHz Pentium-S CPU. Now I want to set it up
for a 200 MHz Pentium-P54C CPU.

Anyone know the jumper settings for this board? The manufacturer
"Expen Tech" doesn't seem to exist anymore (or hasn't any website).
Click to expand...

If you can identify the clock generator chip, then you could probably
determine the jumper functions from its datasheet. Can you post the
part numbers of the smaller chips, particularly the ones near the
14MHz crystal? Alternatively, can you post a photograph or scan of
your mainboard on your web space?


- Franc Zabkar
 
Tom said:
Hello!

I'm looking for a manual or the jumper settings for the above
mainboard. I want to set up the correct CPU speed after I changed the
CPU.

The board is a board with ISA and PCI slots, uses PS/2 FPM or EDO RAM
modules and I used a 100 MHz Pentium-S CPU. Now I want to set it up
for a 200 MHz Pentium-P54C CPU.

Anyone know the jumper settings for this board? The manufacturer
"Expen Tech" doesn't seem to exist anymore (or hasn't any website).
Click to expand...

The bus speed will be the same = 50 MHz. On my Supermicro board of the
same age, only on jumper needs changing for going from 100 MHz to 200 MHz.
On this board there are two groups of 3 jumpers next to the CPU. One
Jumper J35 goes from OFF to ON. It may or may not look the same.
 
The bus speed will be the same = 50 MHz. On my Supermicro board of the
same age, only on jumper needs changing for going from 100 MHz to 200 MHz.
On this board there are two groups of 3 jumpers next to the CPU. One
Jumper J35 goes from OFF to ON. It may or may not look the same.
Click to expand...

The following URL claims that the clock frequency and multiplier
settings for the Pentium 100 and Pentium MMX 200 are 1.5 x 66 and 3.0
x 66, respectively:

http://www17.tomshardware.com/motherboard/20000405/150mhzbus-01.html

So you are correct in saying that only one jumper needs changing,
namely the BF1 clock multiplier jumper. This jumper connects directly
to pin X34 of the CPU socket. The adjacent BF0 jumper connects to pin
Y33. Perhaps the OP can locate the correct jumper by performing a
continuity test with a multimeter (with CPU and jumpers removed).


- Franc Zabkar
 
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