BIOSTAR MICROTECH INTERNATIONAL CORPORATION MB-8500TAC Processor Pentium Processor Speed 75/90/100/120/133/150/166/180MHz Chip Set Unidentified Maximum Onboard 128MB (EDO supported) Memory Maximum Video Memory None 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, serial ports (2), VRM connector NPU Options None [Image] CONNECTIONS Function Label Function Label Serial port 1 CN1 Reset switch J8 pins 12 & 13 Parallel port CN2 Green PC connector J8 pins 17 & 18 Serial port 2 CN3 IDE interface LED J8 pins 20 & 21 Floppy drive CN4 VCC ground J8 pins 25 interface connector & 26 IDE interface 2 CN5 PS/2 mouse port J11 IDE interface 1 CN6 Chassis fan power JP19 Speaker J8 pins 1 - 32-bit PCI slots PC1 - PC3 4 Power LED & keylock J8 pins 5 - VRM connector VRM 9 Turbo LED J8 pins 10 & 11 USER CONFIGURABLE SETTINGS Setting Label Position » Jumper information unavailable J12 N/A » Jumper information unavailable J13 N/A » Jumper information unavailable J21A N/A » Jumper information unavailable JP2 N/A » CMOS memory normal operation JP4 Open CMOS memory clear JP4 Closed Flash BIOS voltage select 5v JP5 Pins 1 & 2 closed Flash BIOS voltage select 12v JP5 Pins 2 & 3 closed EPROM installed JP5 Open Secondary IDE IRQ select IRQ15 JP8 Pins 1 & 2 closed Secondary IDE IRQ select IRQ JP8 Pins 2 & 3 through PCI closed » Primary IDE IRQ14 enabled JP9 Closed Primary IDE IRQ14 disabled JP9 Open » Jumper information unavailable JP12 N/A » Jumper information unavailable JP13 N/A » Factory configured - do not alter JP22 Pins 2 & 3 closed » Jumper information unavailable JP30 N/A » Jumper information unavailable JP31 N/A » Jumper information unavailable JP32 N/A 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) 2M 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 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 40MB (2) 4M x 36 (2) 1M x 36 40MB (2) 1M x 36 (2) 4M x 36 48MB (2) 4M x 36 (2) 2M 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 66MB (2) 8M x 36 (2) 256K x 36 66MB (2) 256K x 36 (2) 8M x 36 68MB (2) 8M x 36 (2) 512K x 36 68MB (2) 512K x 36 (2) 8M x 36 72MB (2) 8M x 36 (2) 1M x 36 72MB (2) 1M x 36 (2) 8M x 36 80MB (2) 8M x 36 (2) 2M x 36 80MB (2) 2M x 36 (2) 8M x 36 96MB (2) 8M x 36 (2) 4M 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/16K/32K 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 Speed JP6 JP7 JP15 JP16 JP21 75MHz Open Open Open Open 1 & 2 90MHz Open Closed Open Open 2 & 3 100MHz Closed Closed Open Open 2 & 3 120MHz Open Closed Closed Open 2 & 3 133MHz Closed Closed Closed Open 2 & 3 150MHz Open Closed Closed Closed 2 & 3 166MHz Closed Closed Closed Closed 2 & 3 180MHz Open Closed Open Closed 2 & 3 Note: Pins designated should be in the closed position. CPU TYPE SELECTION Type JP20 P54C/CS/CQS/CT Pins 1 & 2, 3 & 4 closed P55C Open CPU VOLTAGE SELECTION Voltage JP27 3.4v Pins 1 & 2 closed 3.5v Pins 2 & 3 closed SERIAL PORT 2 SELECTION Setting JP35 JP36 Used as COM2/4 Pins 1 & 2 closed Pins 1 & 2 closed Used as IR connector Pins 2 & 3 closed Pins 2 & 3 closed