J-MARK COMPUTER CORPORATION J-571B Device Type Mainboard Processor CX 6X86/IBM 6X86/CX 686MX/AM K5/AM K6/Pentium Processor Speed 75/90/100/120/133/150/166/200/233/266/300MHz Chip Set SIS Video Chip Set None Maximum Onboard 256MB (EDO & SDRAM supported) Memory Maximum Video None Memory Cache 512KB BIOS Award Dimensions 220mm x 220mm I/O Options 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), IR connector, USB connectors (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Speaker C1 PS/2 mouse J4 interface Reset switch C2 Serial port 1 J6 Turbo LED C3 Parallel port J7 IDE interface LED C4 Serial port 2 J8 Power LED & keylock C5 USB connector 1 JP1 Turbo switch/green PC C6 USB connector 2 JP2 connector IDE interface 2 CN1 Floppy drive JP4 interface IDE interface 1 CN2 CPU fan power JP14 IR connector IR1 32-bit PCI slots PC1 – PC3 USER CONFIGURABLE SETTINGS Function Label Position Green PC connector C6 Pins 1 & 2 closed Turbo switch C6 Pins 2 & 3 closed Flash BIOS voltage select 12v JP3 Pins 2 & 3 closed Flash BIOS voltage select 5v JP3 Pins 1 & 2 closed » CMOS memory normal operation JP7 Pins 1 & 2 closed CMOS memory clear JP7 Pins 2 & 3 closed SIMM CONFIGURATION Size Bank 0 8MB (2) 1M x 36 16MB (2) 2M x 36 32MB (2) 4M x 36 64MB (2) 8M x 36 128MB (2) 16M x 36 256MB (2) 32M x 36 Note: Board accepts EDO memory. DIMM CONFIGURATION Size Bank 0 Bank 1 8MB (1) 1M x 64 None 16MB (1) 2M x 64 None 16MB (1) 1M x 64 (1) 1M x 64 24MB (1) 2M x 64 (1) 1M x 64 32MB (1) 4M x 64 None 32MB (1) 2M x 64 (1) 2M x 64 40MB (1) 4M x 64 (1) 1M x 64 48MB (1) 4M x 64 (1) 2M x 64 64MB (1) 8M x 64 None 64MB (1) 4M x 64 (1) 4M x 64 72MB (1) 8M x 64 (1) 1M x 64 80MB (1) 8M x 64 (1) 2M x 64 96MB (1) 8M x 64 (1) 4M x 64 128MB (1) 16M x 64 None 128MB (1) 8M x 64 (1) 8M x 64 136MB (1) 16M x 64 (1) 1M x 64 144MB (1) 16M x 64 (1) 2M x 64 160MB (1) 16M x 64 (1) 4M x 64 192MB (1) 16M x 64 (1) 8M x 64 256MB (1) 16M x 64 (1) 16M x 64 Note: Board accepts SDRAM memory. CACHE CONFIGURATION Size Bank 0 TAG 512KB (1) 64K x 64 (1) 32K x 32 CPU SPEED SELECTION (CX 6X86) CPU Clock Multiplier JP9/1 JP9/2 JP9/3 JP9/4 JP9/5 JP9/6 speed speed 120MHz 50MHz 2x On Off Off On On On 133MHz 55MHz 2x On Off Off Off On On 150MHz 60MHz 2x On Off Off On On Off 166MHz 66MHz 2x On Off Off On Off On 200MHz 75MHz 2x On Off Off Off On Off CPU SPEED SELECTION (IBM 6X86) CPU Clock Multiplier JP9/1 JP9/2 JP9/3 JP9/4 JP9/5 JP9/6 speed speed 120MHz 50MHz 2x On Off Off On On On 133MHz 55MHz 2x On Off Off Off On On 150MHz 60MHz 2x On Off Off On On Off 166MHz 66MHz 2x On Off Off On Off On 200MHz 75MHz 2x On Off Off Off On Off CPU SPEED SELECTION (CX 6X86MX) CPU Clock Multiplier JP9/1 JP9/2 JP9/3 JP9/4 JP9/5 JP9/6 speed speed 166MHz 60MHz 2.5x On On Off On On Off 166MHz 66MHz 2.5x On On Off On Off On 200MHz 75MHz 2x On Off Off Off On Off 233MHz 66MHz 3x Off On Off On Off On CPU SPEED SELECTION (AM K5) CPU Clock Multiplier JP9/1 JP9/2 JP9/3 JP9/4 JP9/5 JP9/6 speed speed 90MHz 60MHz 1.5x Off Off Off On On Off 100MHz 66MHz 1.5x Off Off Off On Off On 133MHz 66MHz 1.5x Off Off Off On Off On 166MHz 66MHz 2.5x On On Off On Off On CPU SPEED SELECTION (AM K6) CPU Clock Multiplier JP9/1 JP9/2 JP9/3 JP9/4 JP9/5 JP9/6 speed speed 166MHz 66MHz 2.5x On On Off On Off On 200MHz 66MHz 3x Off On Off On Off On 266MHz 66MHz 4x On Off On On Off On 300MHz 66MHz 4.5x On On On On Off On CPU SPEED SELECTION (INTEL) CPU Clock Multiplier JP9/1 JP9/2 JP9/3 JP9/4 JP9/5 JP9/6 speed speed 75MHz 50MHz 1.5x Off Off Off On On On 90MHz 60MHz 1.5x Off Off Off On On Off 100MHz 66MHz 1.5x Off Off Off On Off On 120MHz 60MHz 2x On Off Off On On Off 133MHz 66MHz 2x On Off Off On Off On 150MHz 60MHz 2.5x On On Off On On Off 166MHz 66MHz 2.5x On On Off On Off On 200MHz 66MHz 3x Off On Off On Off On CPU SPEED SELECTION (INTEL MMX) CPU Clock Multiplier JP9/1 JP9/2 JP9/3 JP9/4 JP9/5 JP9/6 speed speed 166MHz 66MHz 2.5x On On Off On Off On 200MHz 66MHz 3x Off On Off On Off On 233MHz 66MHz 3.5x Off Off Off On Off On CPU VOLTAGE SELECTION (SINGLE) Voltage JP13 » 3.3v Pins 1 & 2 closed 3.45v Pins 3 & 4 closed CPU VOLTAGE SELECTION (DUAL) Voltage JP11/pins JP11/pins JP11/pins JP11/pins JP11/pins JP11/pins JP11/pins 1 & 2 3 & 4 5 & 6 7 & 8 9 & 10 11 & 12 13 & 14 2.1v Open Open Open Open Open Open Closed 2.8v Open Open Open Open Open Closed Open 2.9v Open Open Open Open Closed Open Open 3.2v Open Open Open Closed Open Open Open 3.3v Open Open Closed Open Open Open Open 3.45v Open Closed Open Open Open Open Open 3.52v Closed Open Open Open Open Open Open