Hardware Installation
________________________________________________________________
________________________________________________________________
17
M
When the user installs the CPU on socket, please notice the PIN 1 of CPU is in the
same corner as the PIN 1 of socket!
M
Before the CPU is installed, the mainboard must be placed on a flat plane in order to
avoid being broken by the pressure of CPU installation.
3.7. CMOS RTC & ISA CFG CMOS SRAM
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 RTC internal battery is 10 years, the user can change a new RTC to
replace old one after it can not work. The new one's brand and type must be same with old
one.
3.8. SPEAKER CONNECTOR INSTALLATION
There is always a speaker in AT system for sound purpose. The 4 - Pins connector J14 is
used to connect speaker. The speaker can work well in both direction of connector when it is
installed to the connector J14 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 J9
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.
Because a PENTIUM cannot accept real clock speed change when program is executed, so
