User Guide

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
12345678910
66.8MHz
33.4MHz
C
PU
P
CI
→
→
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
12345678910
2.0x(2/1) 4.5x(9/2)
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
5.0x(5/1)
ON
12345678910
7.5x(15/2)7.0x(7/1)6.5x(13/2)6.0x(6/1)
ON
12345678910
5.5x(11/2) 8.0x(8/1)
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
ON
12345678910
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]