Figure 1-4 Microprocessor - Toshiba Infinia 7130 Series Maintenance Manual

Microprocessor Configuration (J10C1-C, D)
These allow the board 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.
Microprocessor Host Bus
Freq. (MHz)
200 66
180 60
166 66
150 60
133 66
120 60
100 66
90 60
75 50
Reserved -
Password clear (J10C1-A, Pins 1, 2, and 3)
Allows both passwords to be cleared by moving the jumper from pins 1-2 to pins 2-3 and
turning the computer on. The computer should then be turned off and the jumper should be
returned to the 1-2 position to restore normal operation. This procedure should only be done
if the user or administrative password has been forgotten. The password function is
effectively disabled if this jumper is in the 2-3 position. Default is for the password to be
enabled (1-2 position).
Clear CMOS (J10C1-A, Pins 4, 5, and 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 computer on. When the computer reports that "NVRAM cleared by
jumper", the computer can be turned off, and the jumper should be returned to the 4-5
position to restore normal operation. Default is for this jumper to be on pins 4-5.
Setup Access (J10C1-B, Pins 1, 2, and 3)
Allows access to the Setup program 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).
BIOS Recovery (J9A1)
This jumper block allows for the system to be booted with a basic BIOS that is hard-coded in
the firmware. Should the system become disabled due to BIOS corruption, you can recover
the system by changing this jumper to recovery mode. Jumpered pins 1-2 is the default setting
for normal operations. Pins 2-3 set the system to recovery mode.
Infinia™ Series Maintenance Manual ----------------------------------------------------------- B-2
Table B-2 Microprocessor/Bus Speed Settings
Jumper
Freq. Settings for
(MHz) J10C1-C
1-2 and 5-6
2-3 and 4-5
1-2 and 5-6
2-3 and 4-5
1-2 and 5-6
2-3 and 4-5
1-2 and 5-6
2-3 and 4-5
2-3 and 5-6
1-2 and 4-5
Jumper PCI
Settings for Freq.
J10C1-D (MHz)
1-2 and 5-6 33
1-2 and 5-6 30
2-3 and 5-6 33
2-3 and 5-6 30
2-3 and 4-5 33
2-3 and 4-5 30
1-2 and 4-5 33
1-2 and 4-5 30
1-2 and 4-5 25
- -
Clock ISA
Ratio Freq.
(MHz)
6/2 8.33
6/2 7.5
5/2 8.33
5/2 7.5
4/2 8.33
4/2 7.5
3/2 8.33
3/2 7.5
3/2 8.33
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