Motherboard Description
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1.11.1 CPU Configuration (J9C1-C, D)These allow the motherboard to be switched between different speeds of the Pentium processor.
These jumpers also affect the PCI and ISA clock speeds according to the following table.
Table 3. CPU/SYSTEM Speed Settings
CPU Freq. (MHz) Host Bus Freq. (MHz) J9C1-C dJ9C1-D
200 66 1-2,5-6 2-3,5-6
166 66 1-2,5-6 1-2,5-6
150 60 2-3,4-5 1-2,5-6
133 66 1-2,5-6 2-3,4-5
120 60 2-3,4-5 2-3,4-5
100 66 1-2,5-6 1-2,4-5
90 60 2-3,4-5 1-2,4-5
75 50 2-3,5-6 1-2,4-5
reserved - 2-3,5-6 2-3,5-6
reserved - 2-3,4-5 2-3,5-6
reserved - 1-2,4-5 1-2,4-5
reserved - 1-2,4-5 2-3,4-5
reserved - 1-2,4-5 1-2,5-6
1.11.2 Clear CMOS (J9C1-A, Pins 4,5,6)Allows CMOS settings to be reset to default values by moving the jumper from pins 4-5 to pins
5-6 and turning the system on. When the system reports that “NVRAM cleared by jumper”, the
system can be turned off, and the jumper should be returned to the 4-5 position to restore normal
operation. This procedure should be done whenever the system BIOS is updated. Default is for
this jumper to be on pins 4-5.
1.11.3 Password clear (J9C1-A, Pins 1,2,3)Allows system password to be cleared by moving the jumper from pins 1-2 to pins 2-3 and turning
the system on. The system should then be turned off and the jumper should be returned to the 3-5
position to restore normal operation. This procedure should only be done if the user password has
been forgotten. The password function is effectively disabled if this jumper is in the 1-3 position.
Default is for the password to be enabled (3-5 position).
1.11.4 CMOS Setup Access (J9C1-B, Pins 1,2,3)Allows access to CMOS Setup utility to be disabled by moving this jumper from the 1-2 position
to the 2-3 position. Default is for access to setup to be enabled (1-2 position).