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SECTION 2
SPECIFICATIONS
2.1
PT-431A System Board Specifications
·
Supports 2pcs. of 72 pins SIMM(single or double bank).
·
Auto configure memory size without hardware jumper.
·
32K, 128K, 256K, 512K cache memory size selectable.
·
Fast CPU reset and Fastgate A20 logic.
·
Speed switching with hardware and software selection.
·
Board size 204 mm by 223 mm.
·
Three 16-bit ISA slots; four PCI slots.
·
Clock chip design makes CPU speed changing easier.
·
I/O slot signal protector on: IRQ9, DRQ2, 0WS#.
·
On board PCI IDE for primary and secondary ports.
·
Selectable built-in / external keyboard controller.
·
Green features to slow down / stop the CPU clock & turn off VGA display signals.
·
Supports DX4 CPU by a safe-proof 3.3V daughter board (DX4DB).
·
Supports ECO-PAD for turning off external power devices in green modes.
·
On-board CPU cooling fan power socket can be switched off automatically in green modes.
2.2
Jumpers and Connectors
Jumpers / Connector
CN1
CN2
J1,JP50,JP51
JP1,JP7,JP8
JP2,JP4,JP14,JP15,JP23,JP26
JP3
JP5
JP6
JP9
JP10
JP11
JP12
JP13
JP16,JP17,JP21,JP27-JP30,JP36,JP40
JP18
JP19
JP20,JP22,JP31
JP24
JP25
JP32,JP34,JP35
JP37
JP38
JP39
JP41
JP42
JP43
JP44
JP45
Description
PCI Primary IDE Connector
PCI Secondary IDE Connector
3.3V Daughter Board Connector
Reset signal connector for different chipset version
Internal / External Keyboard Controller Select
Key-lock Connector
PCI IDE LED Connector
Speaker Connector
Hardware Turbo Switch Connector
Turbo LED Connector
Hardware Reset Switch
Hardware Light Green Stanby Switch
Power Supply Power Down Connector
CPU Mode Select
Flash ROM Power Select
Cyrix M9 Select
P24D Select
Hardware VGA Green Connector
Intel P24D Cache Line
CPU Clock Select
Factory Setting Short 2-3
External Battery Connector
Intel P24C CPU Clock Select
Cooling Fan Power Connector
Powergood Generation
Cooling Fan Control
Cache Size Select
ECO Pad Connector
7
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