PIONEX TECHNOLOGIES, INC. MB-8500TAC-A (VER. 4) Processor CX M1/AM K5/Pentium Processor Speed 66/75/90/100/120/133/150/166/180/200MHz Chip Set Unidentified Video Chip Set None Maximum Onboard 128MB (EDO supported) Memory Maximum Video None Memory Cache 256/512KB BIOS AMI Dimensions 275mm x 220mm I/O Options 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, PS/2 mouse interface, serial ports (2), IR connectors (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Serial port 1 CN1 Green PC connector J8 pins 17 & 18 Parallel port CN2 IDE interface LED J8 pins 20 & 21 Serial port 2 CN3 VCC ground J8 pins 25 & connector 26 Floppy drive CN4 PS/2 mouse port J11 interface IDE interface 2 CN5 IR connector J12 IDE interface 1 CN6 IR connector J12A Speaker J8 pins 1 - 4 PS/2 mouse J13 interface Power LED & J8 pins 5 - 9 Chassis fan power JP19 keylock Turbo LED J8 pins 10 & 32-bit PCI slots PC1 - PC3 11 Reset switch J8 pins 12 & 13 USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not JP2 Unidentified alter » CMOS memory normal operation JP4 Open CMOS memory clear JP4 Closed Flash BIOS voltage select 12v JP5 Pins 2 & 3 closed Flash BIOS voltage select 5v JP5 Pins 1 & 2 closed BIOS type select EPROM JP5 Open Secondary IDE IRQ select IRQ15 JP8 Pins 1 & 2 closed Secondary IDE IRQ select IRQ JP8 Pins 2 & 3 closed through PCI Primary IDE IRQ14 enabled JP9 Closed Primary IDE IRQ14 disabled JP9 Open » Factory configured - do not JP12 Unidentified alter » Factory configured - do not JP13 Unidentified alter » Factory configured - do not JP22 Pins 2 & 3 closed alter » Factory configured - do not JP30 Pins 1 & 2 closed alter » Factory configured - do not JP32 Unidentified alter DRAM CONFIGURATION Size Bank 0 Bank 1 8MB (2) 1M x 36 None 16MB (2) 2M x 36 None 16MB (2) 1M x 36 (2) 1M x 36 24MB (2) 1M x 36 (2) 2M x 36 32MB (2) 4M x 36 None 32MB (2) 2M x 36 (2) 2M x 36 40MB (2) 1M x 36 (2) 4M x 36 48MB (2) 2M x 36 (2) 4M x 36 64MB (2) 8M x 36 None 64MB (2) 4M x 36 (2) 4M x 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 72MB (2) 1M x 36 (2) 8M x 36 80MB (2) 2M x 36 (2) 8M x 36 96MB (2) 4M x 36 (2) 8M x 36 128MB (2) 8M x 36 (2) 8M x 36 Note: Board accepts EDO memory. CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 256KB (A) None (2) 32K x 32 None 256KB (B) (8) 32K x 8 None (1) 8K x 8 512KB (A) (8) 64K x 8 None (1) 16K/32K x 8 512KB (B) (8) 64K x 8 None (1) 16K x 8 Note: Board will either have asynchronous or synchronous cache installed. CACHE JUMPER CONFIGURATION Size JP10 None Open 256KB (B) (STD/Aster TAG) Open 512KB (A) (STD TAG) Pins 1 & 2 closed 512KB (B) (Aster TAG) Pins 2 & 3 closed CPU SPEED SELECTION (CYRIX) CPU Clock Multiplier JP6 JP7 JP15 JP16 JP21 speed speed 120MHz 50MHz 2x Open Open Open Closed 1 & 2 133MHz 55MHz 2x Open Closed Open Closed 1 & 2 150MHz 60MHz 2x Closed Closed Open Closed 2 & 3 166MHz 66MHz 2x Closed Open Open Closed 2 & 3 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (AMD) CPU Clock Multiplier JP6 JP7 JP15 JP16 JP21 speed speed 75MHz 66MHz 1x Closed Open Open Closed 2 & 3 75MHz 50MHz 1.5x Open Open Open Open 1 & 2 90MHz 55MHz 1.5x Open Closed Open Open 2 & 3 90MHz 60MHz 1.5x Closed Closed Open Open 2 & 3 100MHz 66MHz 1.5x Closed Open Open Open 2 & 3 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (INTEL) CPU Clock Multiplier JP6 JP7 JP15 JP16 JP21 speed speed 75MHz 50MHz 1.5x Open Open Open Open 1 & 2 90MHz 60MHz 1.5x Closed Closed Open Open 2 & 3 100MHz 66MHz 1.5x Closed Open Open Open 2 & 3 120MHz 60MHz 2x Closed Closed Open Closed 2 & 3 133MHz 66MHz 2x Closed Open Open Closed 2 & 3 150MHz 60MHz 2.5x Closed Closed Closed Closed 2 & 3 166MHz 66MHz 2.5x Closed Open Closed Closed 2 & 3 180MHz 60MHz 3x Closed Closed Closed Open 2 & 3 200MHz 66MHz 3x Closed Open Closed Open 2 & 3 Note: Pins designated should be in the closed position. CPU TYPE SELECTION Type JP20 JP23 JP24 CX M1 Open Pins 1 & 2, 4 & Pins 2 & 3, 4 & 5, 7 & 5 closed 8, 9 & 10 closed AM K5 Open Pins 1 & 2, 4 & Pins 2 & 3, 4 & 5, 7 & 5 closed 8, 9 & 10 closed P54C/CQS/CT Open Pins 1 & 2, 4 & Pins 2 & 3, 4 & 5, 7 & 5 closed 8, 9 & 10 closed P55C/CT Closed Pins 2 & 3, 5 & Pins 1 & 2, 3 & 4, 6 & 6 closed 7, 8 & 9 closed CPU VOLTAGE SELECTION Voltage JP27 3.4v Closed 3.5v Open SERIAL PORT 2 SELECTION Setting JP35 JP36 Used as COM2 Pins 1 & 2 closed Pins 1 & 2 closed Used as IR connector Pins 2 & 3 closed Pins 2 & 3 closed