Hardware Installation
3-7
JP2, JP3, JP4
(Select the system speed
－
66, 75, 83 MHz )
MAIN CLOCK
JP4
JP3
JP2
66MHz
2-3
2-3
2-3
75MHz
2-3
1-2
2-3
83MHz
1-2
2-3
1-2
The CPU is a sensitive electric component and it can be easily
damaged by static electricity, so users must keep it away from metal
surface when the CPU is installed onto mainboard.
We don’t recommend you to setup your system speed to 75 or 83
MHz because these frequencies are not the standard specifications
for CPU, Chipset and most of the peripherals. Whether your system
can run under 75 or 83MHz properly will depend on your hardware
configurations: CPU, SDRAM, Cards, etc.
3.6. CMOS RTC & ISA CFG CMOS SRAM
The mainboard contains RTC & CMOS SRAM on board. They have a power
supply from external battery to keep the DATA inviolate & effective. The RTC is
a REAL-TIME CLOCK device, which provides the DATE & TIME to system. The
CMOS SRAM is used for keeping the information of system configuration, so
the system can automatically boot OS every time. Since the lifetime of internal
battery is 5 years, the user can change a new Battery to replace old one when
it has consumed.
3.7. SPEAKER CONNECTOR INSTALLATION
There is a speaker in AT system for sound purpose. The 4
-
Pins connector
SPKR
is used to connect speaker.
3.8. HARDWARE RESET SWITCH CONNECTOR INSTALLATION
The RESET switch on panel provides users with HARDWARE RESET function.
The system will do a cold start after the RESET switch is press and released by
user. The RESET switch is a 2 PINS connector and should be installed to
RES
on mainboard.
3.9. POWER LED CONNECTOR INSTALLATION
System has power LED lamp on the panel of case. The power LED will light on
off or flash to indicate which step on the system. The connector should be
connected to
LED
of mainboard in correct direction.
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