16
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 for Close (On) and for Open (Off).
To connect the pins, simply place a plastic jumper cap over the two pins.
CPU Clock Speed Selection - JP2 and JP9
HOT-679 featuring CPU Plug & Play function, the user needn't to adjust onboard system clock
and CPU multiplier.
When the system power-on first time, BIOS will set CPU clock
speed to
233 MHz
or
200 MHz
(depend on CPU external frequency) automatically
. If
your CPU speed higher than 233 MHz, you only have to entry BIOS to set CPU speed to the
higher one.
HOT-679 mainboard features a clock generator to provide adjustable system clock frequency.
JP2 is a 6-pin jumpers which determine the system clock frequency 66 MHz to 133 MHz.
CPU Plug & Play function is supported by
66MHz / 100MHz.
HOT-679 mainboard provides Jumper group of JP9 to figure the CPU core clock multiplier.
By inserting mini jumpers on MANUAL group, the user can figure the Host Bus Clock/CPU
Core Clock ratio (multiplier) manually.
CPU Plug & Play function is supported when an Jumper Pack inserted on
AUTO group.
Listed diagrams on right side show the sample position on jumper group of JP9:
1)
Setting CPU Clock from BIOS
- jumper pack on Row B-C group.
(Factory default)
2)
Adjust multiplier manually from hardware
- removeing jumper pack from Row B-C group and inserting
mini jumpers on Row A-B group, multiplier set to 5X manually.
Figure 2-27 shows the position of JP2 and JP9 on the mainboard.
Figure 2-27
