Hardware Installation
3-7
There're RTC & CMOS SRAM on board, they have a power supply from
internal 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 ISA device system
configuration, so the system can automatically boot OS. every time.
Due to the life-time of 3V Li-battery is 5 years, the user can change a new
one to replace old one after it can not work.
3.8. SPEAKER CONNECTOR INSTALLATION
There is always a speaker in AT system for sound purpose. The 4 - Pins
connector
J6
is used to connect speaker.
The speaker can work well in both direction of connector when it is installed
to the connector
J6
on mainboard.
3.9. POWER LED & KEY LOCK CONNECTOR INSTALLATION
There are a system power LED lamp and a key on the panel of case. The
power LED will light on when system is powered-on, and the key can lock the
keyboard input or unlock it, both of them are connected to a 5 PIN connector.
The connector should be installed to
J7
of mainboard in correct direction.
3.10. TURBO SWITCH CONNECTOR INSTALLATION
The TURBO switch on the panel is used for controlling the system speed.
Some program developed on XT should be executed with a low speed
system, so a high speed system needs the speed switching function to
change its running speed.
The mainboard uses 50 MHz speed method to implement DE-TURBO
switching function. The
J11
on mainboard should be connected to the
TURBO switch on panel, and user can push in or pop out the TURBO switch
to enable or disable the turbo function of system.
NOTE: If the system already use 50MHz clock, then the TURBO function
will inactive.
3.11. TURBO LED CONNECTOR INSTALLATION
The TURBO LED on panel can indicate the current speed status of system.
The TURBO LED connector should be installed to
J12
in correct direction.
3.12. HARDWARE RESET SWITCH CONNECTOR INSTALLATION
