J-MARK COMPUTER CORPORATION J-656VXB Processor CX M1/AM K5/Pentium Processor Speed 75/90/100/120/133/150/166/200MHz Chip Set Intel Video Chip Set None Maximum Onboard 128MB (EDO supported) Memory Maximum Video Memory None Cache 256/512KB BIOS Award Dimensions 270mm 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), cache slot, IR connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Serial port 1 CN1 IDE interface LED JC5 Serial port 2 CN2 Power LED & keylock JC6 Parallel port CN3 Turbo switch JC7 Floppy drive interface CN4 Green PC connector JC8 IDE interface 2 CN5 IR connector JP12 IDE interface 1 CN6 Chassis fan power JP21 PS/2 mouse interface J1 External battery JP23 Speaker JC2 32-bit PCI slots PC1 – PC3 Reset switch JC3 Cache slot SL1 Turbo LED JC4 USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not J4 Unidentified alter » Factory configured - do not JP3 Unidentified alter PCICLK select PCICLK/4 JP22 Closed PCICLK select PCICLK/3 JP22 Open PS/2 IRQ12 enabled JP29 Closed PS/2 IRQ12 disabled JP29 Open Flash BIOS voltage select 12v JP33 Pins 1 & 2 closed Flash BIOS voltage select 5v JP33 Pins 2 & 3 closed DIMM/DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 8MB (2) 1M x 36 None None 8MB None None (1) 1M x 64 16MB (2) 2M x 36 None None 16MB (2) 1M x 36 (2) 1M x 36 None 16MB None None (1) 2M x 64 24MB (2) 2M x 36 (2) 1M x 36 None 32MB (2) 4M x 36 None None 32MB (2) 2M x 36 (2) 2M x 36 None 32MB None None (1) 4M x 64 40MB (2) 4M x 36 (2) 1M x 36 None 48MB (2) 4M x 36 (2) 2M x 36 None DIMM/DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 64MB (2) 8M x 36 None None 64MB (2) 4M x 36 (2) 4M x 36 None 72MB (2) 8M x 36 (2) 1M x 36 None 80MB (2) 8M x 36 (2) 2M x 36 None 96MB (2) 8M x 36 (2) 4M x 36 None 128MB (2) 8M x 36 (2) 8M x 36 None Note: Board accepts EDO memory. CACHE CONFIGURATION Size Bank 0 SL1 TAG 256KB (A) (2) 32K x 32 Not installed (1) 32K x 8 256KB (B) None 256KB module (1) 32K x 8 installed 512KB (A) (2) 32K x 32 256KB module (1) 32K x 8 installed 512KB (B) None 512KB module (1) 32K x 8 installed CACHE JUMPER CONFIGURATION Size JP1 JP2 JP7 JP8 256KB (A) 1 & 2 1 & 2 1 & 2 1 & 2 256KB (B) 1 & 2 1 & 2 1 & 2 1 & 2 512KB (A, Jet-Way 2 & 3 1 & 2 2 & 3 1 & 2 module) 512KB (A, Intel 1 & 2 2 & 3 1 & 2 2 & 3 module) 512KB (B, Jet-Way 2 & 3 1 & 2 2 & 3 1 & 2 module) 512KB (B, Intel 1 & 2 2 & 3 1 & 2 2 & 3 module) Note: Pins designated should be in the closed position. CPU SPEED SELECTION (CYRIX) CPU speed Clock Multiplier J5 JP13 JP14 speed 120MHz 50MHz 2x 3 & 4, Closed Open 5 & 6 133MHz 55MHz 2x 3 & 4 Closed Open 150MHz 60MHz 2x 5 & 6 Closed Open 166MHz 66MHz 2x Open Closed Open Note: Pins designated should be in the closed position. CPU SPEED SELECTION (AMD) CPU speed Clock Multiplier J5 JP13 JP14 speed 90MHz 60MHz 1.5x 5 & 6 Open Open 100MHz 66MHz 1.5x Open Open Open Note: Pins designated should be in the closed position. CPU SPEED SELECTION (INTEL) CPU speed Clock Multiplier J5 JP13 JP14 speed 75MHz 50MHz 1.5x 3 & 4, Open Open 5 & 6 90MHz 60MHz 1.5x 5 & 6 Open Open 100MHz 66MHz 1.5x Open Open Open 120MHz 60MHz 2x 5 & 6 Closed Open 133MHz 66MHz 2x Open Closed Open 150MHz 60MHz 2.5x 5 & 6 Closed Closed 166MHz 66MHz 2.5x Open Closed Closed 200MHz 66MHz 3x Open Open Closed Note: Pins designated should be in the closed position. CPU VOLTAGE SELECTION (SINGLE) Voltage JP24 JP25 JP26 3.3v Closed Open Open 3.45v Open Closed Open 3.52v Open Open Closed CPU VOLTAGE SELECTION (DUAL) Voltage V J11 J12 J13 JP24 JP25 JP26 core 3.3v 2.5v Closed Open Open Closed Open Open 3.3v 2.8v Open Closed Open Open Closed Open 3.3v 3.45v Open Open Closed Open Open Closed 3.45v 2.5v Closed Open Open Closed Open Open 3.45v 2.8v Open Closed Open Open Closed Open 3.45v 3.45v Open Open Closed Open Open Closed 3.52v 2.5v Closed Open Open Closed Open Open 3.52v 2.8v Open Closed Open Open Closed Open 3.52v 3.45v Open Open Closed Open Open Closed MOS CMOS SELECTION Setting JP23 JP35 » CMOS memory normal Pins 2 & 3 closed Open operation CMOS memory clear Pins 3 & 4 closed Closed