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2 Casing, System Boards and Video
System Board, Switches and Jumpers
CPU Bus Frequency Jumper (J7)
This jumper sets the CPU bus frequency. The following figure shows the
possible settings.
Cache Jumper (J6)
This jumper selects the cache type—either synchronous or asynchronous.
The default setting is for synchronous cache. The following figure shows the
two settings.
Space-bar Power-on Feature Jumper (JP4)
The Space-bar Power-On feature (“KBD Start” on the system board) enables
the PC to be turned on using the spacebar. To enable this feature, a jumper
has to be inserted. This setting overrides the setting in the Setup program.
4
3
1
4
3
1
4
3
1
50 MHz 60 MHz 66 MHz
Synchronous Asynchronous
1
2
3
1
2
3
Space-bar Power-on
enabled
Space-bar Power-on
disabled