Jumpers - Shuttle HOT-661Z User Manual

Jumpers

Several hardware settings are made through the use of jumper caps to connect jumper pins on
the main board. The jumper's pin 1 on main board will be on the top or on the left when hold-
ing the main board with the keyboard connector away from yourself.
Jumpers with two pins will be shown as
To connect the pins, simply place a plastic jumper cap over the two pins.
CPU Clock Speed Selection - JP39 and JP37
HOT-661/P featuring CPU Speed Soft-Configure function. The user can adjust CPU Host
Clock and CPU Clock Ration from BIOS.
set CPU clock speed to 233 MHz or 350 MHz automatically depend on the CPU
your CPU speed higher than 233 MHz or 350 MHz., you only have to entry BIOS to set CPU
speed to the higher one.
For the practiced user, HOT-661/P also provides Hard-Configure function to adjust your CPU
Speed. You can adjust your CPU Host Clock on JP39 and adjust your CPU Clock Ratio on
JP37 manually. Please refer to next section on next two pages.
Soft-Configure CPU Clock from BIOS
1) Inserting jumper pack on AUTO group of JP37.
2) Leave jumper JP39 open.
Hard-Configure CPU Host Clock and CPU Clock Ratio.
1) Removing jumper pack from JP37.
2) Inserting mini jumpers properly on JP37 for desired CPU Clock Ratio.
3) Inserting mini jumper/s properly on JP39 for desired CPU Host Clock.
(Above graphics show to configure
CPU Speed to 300 MHz - 66 MHz x 4.5)
for Close (On) and
When the system power-on first time, BIOS will
Figure 2-27
for Open (Off).
type. If
15