Chapter2
Motherboard Layout
The main board is designed with Intel 430TX PCIset chipset which is developed by Intel Corporation to fully support Pentium Processor PCI/ISA system. The Intel 430TX PCIset chipset provides increased integration and improved performance designs. The chipset provides an integrated IDE controller with two high performance IDE interfaces for up to four IDE devices (hard devices, CD-ROM device, etc).The Super I/O controller provides the standard PC I/O function: floppy interface, two 16Byte FIFO serial ports and EPP/ECP capable parallel port. This main board layout is shown in previous page (left page) for user's reference. Care must be taken when inserting memory modules, inserting CPU or even plugging PCI card into associated slots to avoid damaging any circuits or sockets on board. A cooling fan is strongl y recommended when installing P54C. P55C/K5/K6/6x86/6x86L processor due to possible overheat.
The main board supports minimum of 8MB of system memory and maximum of 256MB while L2 Cache can be 256KB/512KB synchronous SRAM Onboard .
The main board supports standard Fast Page, EDO(Extended Data Out or Hyper Page Mode) or synchronous DRAM. The main board provides four 72-pins SIMM and two 168-pins DIMM sites for memory expansion. The socket support 1M x 32 (4MB), 2M x32 (8MB), 4M x 32(16MB), and 8M x 32(32MB) single-sided or double-sided memory modules. The memory timing requires 70 ns Fast Page devices or 60 ns EDO DRAM. Memory parity generation and checking is not supported. (DRAM Modules may be parity (x 36) or non-parity (x32)).
The main board supports Onboard two PCI IDE connectors, and detects IDE harddisk type by BIOS utility automatic.
The main board supports Award Plug & Play BIOS for the ISA and PCI cards. The BIOS can be located in Flash EPROM . The advantage of having Flash EPROM is much easier to replace BIOS code if necessary.
Mainboard Layout
FS1,FS2 :Bus Clock select JP6:Single/Dual voltage select
BF0,BF1,BF2,BF3 :for RATIO select JP7:cpu voltage select
JP5:DIMM voltage Select J1:ps2/ mouse
JP8:MTX Clock select J8:(keylock,spk,ID LED…)
Connectors and Jumpers
This section describes all of the connectors and jumpers equipped in the motherboard. Please refer to board layout page 5 for actual location of each connector and jumper
PS/2 Mouse Connector:
Pin Desoription
1
RED wire
2
NC
3
Green wire
4
Yellow Wire
5
Blue Wire
IRDA/ASK IR Connector:
Pin
Description
VCC
IRRX
GND
IRTX
Intel CPU Installation
Defined: x= don't care, 1=short, 0=open
BF0, BF1, BF2 (for CPU bus/core ratio)
For Intel P54C/AMD K5
cpu mode
BUS clock
ratio
fs0
fs1
bf0
bf1
bf2
AMD-K5-PR90
INTEL Pentium 90(P54C)
60MHZ
1.5
2-3
1-2
AMD-K5-PR100
INTEL Pentium 100(P54C)
66MHZ
AMD-K5-PR120
2.0
AMD-K5-PR133
INTEL Pentium 133(P54C)
AMD-K5-PR166
INTEL Pentium 166(P54C)
2.5
INTEL Pentium 200(P54C)
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