J-MARK COMPUTER CORPORATION J-5TXBR2 Device Type Mainboard Processor CX 6X86/IBM 6X86/CX 686MX/IBM 6X86MX/AM K5/AM K6/Pentium Processor Speed 75/90/100/120/133/150/166/200/233/266/300MHz Chip Set Intel 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 (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), IR connector, USB connectors (2), ATX power connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location ATX power ATX USB connector 1 J17 connector IDE interface LED C1 USB connector 2 J18 Green PC connector C2 CPU fan power J19 PS/2 mouse J1 Soft off power J20 interface supply Serial port 2 J6 Speaker J22/pins 1 - 4 Serial port 1 J7 Reset switch J22/pins 5 & 6 Floppy drive J8 Turbo LED J22/pins 7 & 8 interface IDE interface 1 J9 Power LED & J22/pins 9 - keylock 13 Parallel port J10 Turbo switch J22/pins 14 - 16 IDE interface 2 J11 32-bit PCI slots PC1 – PC4 IR connector J16 USER CONFIGURABLE SETTINGS Function Label Position Flash BIOS voltage select 12v JP3 Pins 1 & 2 closed Flash BIOS voltage select 5v JP3 Pins 2 & 3 closed » CMOS memory normal operation JP4 Pins 2 & 3 closed CMOS memory clear JP4 Pins 3 & 4 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 speed Clock speed Multiplier JP6 120MHz 50MHz 2x Pins 17 & 18 closed 133MHz 55MHz 2x Pins 19 & 20 closed 150MHz 60MHz 2x Pins 21 & 22 closed 166MHz 66MHz 2x Pins 23 & 24 closed 200MHz 75MHz 2x Pins 25 & 26 closed CPU SPEED SELECTION (IBM 6X86) CPU speed Clock speed Multiplier JP6 120MHz 50MHz 2x Pins 17 & 18 closed 133MHz 55MHz 2x Pins 19 & 20 closed 150MHz 60MHz 2x Pins 21 & 22 closed 166MHz 66MHz 2x Pins 23 & 24 closed 200MHz 75MHz 2x Pins 25 & 26 closed CPU SPEED SELECTION (CX 6X86MX) CPU speed Clock speed Multiplier JP6 166MHz 66MHz 2.5x Pins 11 & 12 closed 200MHz 66MHz 2.5x Pins 13 & 14 closed 200MHz 75MHz 2x Pins 25 & 26 closed 233MHz 66MHz 3x Pins 15 & 16 closed CPU SPEED SELECTION (AM K5) CPU speed Clock speed Multiplier JP6 90MHz 60MHz 1.5x Pins 3 & 4 closed 100MHz 66MHz 1.5x Pins 5 & 6 closed 133MHz 66MHz 1.5x Pins 5 & 6 closed 166MHz 66MHz 2.5x Pins 13 & 14 closed CPU SPEED SELECTION (AM K6) CPU speed Clock speed Multiplier JP6 166MHz 66MHz 2.5x Pins 13 & 14 closed 200MHz 66MHz 3x Pins 15 & 16 closed 266MHz 66MHz 4x Pins 27 & 28 closed 300MHz 66MHz 4.5x Pins 29 & 30 closed CPU SPEED SELECTION (INTEL) CPU speed Clock speed Multiplier JP6 75MHz 50MHz 1.5x Pins 1 & 2 closed 90MHz 60MHz 1.5x Pins 3 & 4 closed 100MHz 66MHz 1.5x Pins 5 & 6 closed 120MHz 60MHz 2x Pins 7 & 8 closed 133MHz 66MHz 2x Pins 9 & 10 closed 150MHz 60MHz 2.5x Pins 11 & 12 closed 166MHz 66MHz 2.5x Pins 13 & 14 closed 200MHz 66MHz 3x Pins 15 & 16 closed CPU SPEED SELECTION (INTEL MMX) CPU speed Clock speed Multiplier JP6 166MHz 66MHz 2.5x Pins 13 & 14 closed 200MHz 66MHz 3x Pins 15 & 16 closed 233MHz 66MHz 3.5x Pins 5 & 6 closed CPU VOLTAGE SELECTION Voltage JP7/pins 1 & JP7/pins 3 & JP7/pins 5 & JP7/pins 7 & 2 4 6 8 2.1v Closed Open Open Open 2.8v Open Open Open Closed 2.9v Closed Open Open Closed 3.1v Open Open Closed Closed 3.3v Closed Open Closed Closed 3.45v Open Closed Closed Closed 3.5v Closed Closed Closed Closed