J-MARK COMPUTER CORPORATION J-TX98 R2 Device Type Mainboard Processor CX 6X86/IBM 6X86/CX 686MX/IBM 6X86MX/AM K5/ AM K6/Pentium/Pentium MMX Processor Speed 75/90/100/120/133/150/166/180/200/233/266/300MHz Chip Set SIS 5598 Video Chip Set SIS Maximum Onboard 384MB (EDO & SDRAM supported) Unified Memory Architecture Memory (UMA) Cache 256/512KB BIOS Unidentified Dimensions 254mm x 218mm I/O Options 32-bit PCI slots (3), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), IR connector, USB connector, ATX power connector, VGA interface [Image] CONNECTIONS Purpose Location Purpose Location ATX power connector ATX Floppy drive CN3 interface Turbo LED C1 Parallel port CN4 Reset switch C2 IDE interface 2 CN5 Speaker C3 IDE interface 1 CN6 Turbo switch C4 IR connector IR1 Power LED & keylock C5 PS/2 mouse interface J1 IDE interface LED C6 VGA interface J5 Soft off power supply C7 CPU fan power J9 Serial port 1 CN1 32-bit PCI slots PC1 – PC3 Serial port 2 CN2 USB connector USB USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not JP11 Unidentified alter » Factory configured - do not JP12 Unidentified alter » Factory configured - do not JP14 Unidentified alter » CMOS memory normal operation JP17 Pins 1 & 2 closed CMOS memory clear JP17 Pins 2 & 3 closed Flash BIOS voltage select 12v JP19 Pins 1 & 2 closed Flash BIOS voltage select 5v JP19 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 Note: Board accepts EDO memory. DIMM CONFIGURATION Size Bank 1 Bank 2 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 DIMM CONFIGURATION (CON’T) Size Bank 1 Bank 2 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 256KB (1) 32K x 64 (1) 32K x 8 512KB (1) 64K x 64 (1) 32K x 8 CPU SPEED SELECTION (CX 6X86) CPU Clock Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 speed speed 120MHz 50MHz 2x On On On On Off Off 133MHz 55MHz 2x On On Off On Off Off 150MHz 60MHz 2x Off On On On Off Off 166MHz 66MHz 2x On Off On On Off Off CPU SPEED SELECTION (IBM 6X86) CPU Clock Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 speed speed 120MHz 50MHz 2x On On On On Off Off 133MHz 55MHz 2x On On Off On Off Off 150MHz 60MHz 2x Off On On On Off Off 166MHz 66MHz 2x On Off On On Off Off CPU SPEED SELECTION (CX 6X86MX) CPU Clock Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 speed speed 166MHz 60MHz 2.5x Off On On On On Off 166MHz 66MHz 2.5x On Off On On On Off 233MHz 66MHz 3x On Off On Off On Off CPU SPEED SELECTION (IBM 6X86MX) CPU Clock Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 speed speed 166MHz 60MHz 2.5x Off On On On On Off 166MHz 66MHz 2.5x On Off On On On Off 233MHz 66MHz 3x On Off On Off On Off CPU SPEED SELECTION (IDT C6) CPU Clock Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 speed speed 150MHz 50MHz 3x On On On Off On Off 180MHz 60MHz 3x Off On On Off On Off 200MHz 66MHz 3x On Off On Off On Off CPU SPEED SELECTION (AM K5) CPU Clock Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 speed speed 75MHz 50MHz 1.5x On On On Off Off Off 90MHz 60MHz 1.5x Off On On Off Off Off 100MHz 66MHz 1.5x On Off On Off Off Off 133MHz 66MHz 1.5x On Off On Off Off Off 166MHz 66MHz 2.5x On Off On On On Off CPU SPEED SELECTION (AM K6) CPU Clock Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 speed speed 166MHz 66MHz 2.5x On Off On On On Off 200MHz 66MHz 3x On Off On Off On Off 233MHz 66MHz 3.5x On Off On Off Off Off 266MHz 66MHz 4x On Off On On Off On 300MHz 66MHz 4.5x On Off On On On On CPU SPEED SELECTION (INTEL) CPU Clock Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 speed speed 75MHz 50MHz 1.5x On On On Off Off Off 90MHz 60MHz 1.5x Off On On Off Off Off 100MHz 66MHz 1.5x On Off On Off Off Off 120MHz 60MHz 2x Off On On On Off Off 133MHz 66MHz 2x On Off On On Off Off 150MHz 60MHz 2.5x Off On On On On Off 166MHz 66MHz 2.5x On Off On On On Off 200MHz 66MHz 3x On Off On Off On Off CPU SPEED SELECTION (INTEL MMX) CPU Clock Multiplier SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 speed speed 166MHz 66MHz 2.5x On Off On On On Off 200MHz 66MHz 3x On Off On Off On Off 233MHz 66MHz 3.5x On Off On Off Off Off CPU VOLTAGE SELECTION Voltage JP15/pins 1 JP15/pins 3 JP15/pins 5 JP15/pins 7 & & 2 & 4 & 6 8 2.2v Open Closed Open Open 2.8v Open Open Open Closed 2.9v Closed Open Open Closed 3.2v Open Open Closed Closed 3.45v Open Closed Closed Closed 3.52v Closed Closed Closed Closed ON BOARD VIDEO SELECTION Setting JP1 JP2 JP10 Enabled Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed Disabled Pins 2 & 3 Pins 2 & 3 Pins 1 & 2 closed closed closed