CHAPTER 2
HARDWARE INSTALLATION
4
5
6
Clock
OFF
OFF
ON
50MHz
ON
ON
OFF
55MHz
ON
OFF
OFF
60MHz
OFF
OFF
OFF
66.8MHz
OFF
ON
OFF
75MHz
ON
ON
ON
83MHz
4
5
6
Clock
ON
ON
ON
50MHz
ON
OFF
OFF
60MHz
OFF
OFF
OFF
66.6MHz
OFF
ON
OFF
75MHz
ON
OFF
ON
83MHz
SW1
CPU
2.1-2 CPU Core Speed Derivation Procedure
The mainboard uses two kind of Clock generator: ICS9148-04 and IMI643.
These two clock generator have different clock frequency.
1. The DIP Switch SW1 (4, 5, and 6) is used to adjust the CPU clock
frequency.
A. Clock Generator: ICS9148-04
SW1
CPU
B. Clock Generator: IMI643
2-2
