16
ASUS MEB-M User’s Manual
III. HARDWARE SETUP
DIP Switches
III. H/W SETUP
4. CPU External (BUS) Frequency Selection (DIP1, 2, 3, 4)
These DIP switches tell the clock generator what frequency to send to the CPU.
These allow the selection of the CPU’s External frequency (or BUS Clock). The
BUS Clock times the BUS Ratio equals the CPU's Internal frequency (the ad-
vertised CPU speed).
MEB-M CPU External Clock
(BUS) Frequency Selection
ON
1234
56789
1
0
66.8MHz
33.4MHz
CPU
PCI
→
→
5. CPU to BUS Frequency Multiple (DIP7, 8, 9, 10)
These DIP switches set the frequency multiple between the Internal frequency
of the CPU and the External frequency (called the BUS Clock) within the CPU.
MEB-M CPU : BUS Frequency Multiple
4.0x(4/1)
3.5x(7/2)
3.0x(3/1)
2.5x(5/2)
ON
123456789
1
0
2.0x(2/1)
4.5x(9/2)
ON
123456789
1
0
ON
123456789
1
0
ON
123456789
1
0
ON
123456789
1
0
ON
123456789
1
0
5.0x(5/1)
ON
123456789
1
0
7.5x(15/2)
7.0x(7/1)
6.5x(13/2)
6.0x(6/1)
ON
123456789
1
0
5.5x(11/2)
8.0x(8/1)
ON
123456789
1
0
ON
123456789
1
0
ON
123456789
1
0
ON
123456789
1
0
ON
123456789
1
0
Set the DIP switches by the Internal speed of your processor as follows:
(BUS Frequency)
(Frequency Multiple)
Intel CPU Model
Speed
Mult
Freq.
DIP1 DIP2 DIP3 DIP4
DIP7 DIP8 DIP9 DIP10
Celeron (PPGA)
366MHz
5.5x
66MHz
[OFF] [OFF] [ON]
[ON]
[ON]
[ON]
[ON] [OFF]
Celeron (PPGA)
366MHz
5.5x
66MHz
[OFF] [OFF] [ON]
[ON]
[OFF] [OFF] [OFF] [ON]
Celeron (PPGA)
333MHz
5.0x
66MHz
[OFF] [OFF] [ON]
[ON]
[ON] [OFF] [OFF] [ON]
Celeron (PPGA)
300MHz
4.5x
66MHz
[OFF] [OFF] [ON]
[ON]
[OFF] [ON] [OFF] [ON]
