Jumper Setting
System Clock Selection
433 mainboard features a
clock generator to pro
vide adjustable system
clock frequency. JP l,
JP2, and JP3 are all 3-pin
jumper which determine
the clock frequency.
Proper jumper settings
for generating 25MHz to
50MHz clock frequency
for 486 system are shown
bellow.
25MHz
System Clok
1 JPl
1
140MHz
System Clok
1 JPI
1
JPI
6
JP2
JP3
6
External
Keyboard BIOS
!SA Slot I
!SA Slot 2
!SA Slot 3
33MHz
System C/ok
1 JPl
1
JP2
50MHz
System Clok
I
1 JPI
1
JP3
User's Manua/ 1 1
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