J-MARK COMPUTER CORPORATION J-648A Processor CX M1/IBM 6X86/AM K5/Pentium Processor Speed 75/90/100/120/133/150/166/200MHz Chip Set SIS Video Chip Set None Maximum Onboard 512MB (EDO supported) Memory Maximum Video Memory None Cache 256/512KB BIOS Award Dimensions 250mm 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), VGA feature connector, VGA interface, IR connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Chassis fan power CN1 Parallel port J6 Speaker CN2 Serial port 2 J7 Reset switch CN3 Floppy drive J8 interface Turbo LED CN4 IR connector J9 Turbo switch CN5 VGA feature connector J10 IDE interface LED CN6 VGA interface J11 Green PC connector CN7 IDE interface 2 J14 Power LED & keylock CN8 IDE interface 1 J15 PS/2 mouse interface J1 32-bit PCI slots PC1 – PC3 Serial port 1 J2 USER CONFIGURABLE SETTINGS Function Label Position » CMOS memory normal operation J18 Pins 2 & 3 closed CMOS memory clear J18 Pins 3 & 4 closed Flash BIOS voltage select 12v JP5 Pins 1 & 2 closed Flash BIOS voltage select 5v JP5 Pins 2 & 3 closed » Factory configured - do not JP10 Unidentified alter » Factory configured - do not JP18 Unidentified alter » Factory configured - do not JP25 Unidentified alter Monitor type select color JP29 Closed Monitor type select monochrome JP29 Open PS/2 mouse IRQ12 enabled JP48 Closed PS/2 mouse IRQ12 disabled JP48 Open DRAM CONFIGURATION Size Bank 0 Bank 1 4MB (2) 512K x 36 None 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 32MB (2) 4M x 36 None 32MB (2) 2M x 36 (2) 2M x 36 40MB (2) 4M x 36 (2) 1M x 36 48MB (2) 4M x 36 (2) 2M x 36 64MB (2) 8M x 36 None 64MB (2) 4M x 36 (2) 4M x 36 72MB (2) 8M x 36 (2) 1M x 36 80MB (2) 8M x 36 (2) 2M x 36 96MB (2) 8M x 36 (2) 4M x 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 128MB (2) 8M x 36 (2) 8M x 36 128MB (2) 16M x 36 None 136MB (2) 16M x 36 (2) 1M x 36 144MB (2) 16M x 36 (2) 2M x 36 160MB (2) 16M x 36 (2) 4M x 36 192MB (2) 16M x 36 (2) 8M x 36 256MB (2) 32M x 36 None 256MB (2) 16M x 36 (2) 16M x 36 264MB (2) 32M x 36 (2) 1M x 36 272MB (2) 32M x 36 (2) 2M x 36 288MB (2) 32M x 36 (2) 4M x 36 320MB (2) 32M x 36 (2) 8M x 36 384MB (2) 32M x 36 (2) 16M x 36 512MB (2) 32M x 36 (2) 32M x 36 Note: Board accepts EDO memory. CACHE CONFIGURATION Size Bank 0 TAG 256KB (2) 32K x 32 (1) 32K x 8 512KB (2) 64K x 32 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP3 256KB Open 512KB Closed CPU SPEED SELECTION (CYRIX) CPU Clock Multiplier JP4 JP9 JP11 JP26 speed speed 120MHz 50MHz 2x Closed Open Closed 1 & 2, 3 & 4 133MHz 66MHz 2x Closed Open Closed Open 150MHz 60MHz 2x Closed Open Closed 1 & 2 166MHz 66MHz 2x Closed Open Closed 3 & 4 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (IBM) CPU Clock Multiplier JP4 JP9 JP11 JP26 speed speed 133MHz 55MHz 2x Closed Open Closed Open 150MHz 60MHz 2x Closed Open Closed 1 & 2 166MHz 66MHz 2x Closed Open Closed 3 & 4 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (AMD) CPU Clock Multiplier JP4 JP9 JP11 JP26 speed speed 90MHz 60MHz 1.5x Open Open Open 1 & 2 100MHz 66MHz 2x Open Open Open 3 & 4 133MHz 66MHz 2x Open Open Open 3 & 4 Note: Pins designated should be in the closed position. CPU SPEED SELECTION (INTEL) CPU Clock Multiplier JP4 JP9 JP11 JP26 speed speed 75MHz 50MHz 1.5x Open Open Open 1 & 2, 3 & 4 90MHz 60MHz 1.5x Open Open Open 1 & 2 100MHz 66MHz 1.5x Open Open Open 3 & 4 120MHz 60MHz 2x Open Open Closed 1 & 2 133MHz 66MHz 2x Open Open Closed 3 & 4 150MHz 60MHz 2.5x Open Closed Closed 1 & 2 166MHz 66MHz 2.5x Open Closed Closed 3 & 4 200MHz 66MHz 3x Open Closed Open 3 & 4 Note: Pins designated should be in the closed position. CPU VOLTAGE SELECTION Voltage JP16 3.3v Pins 1 & 2 closed 3.45v Pins 3 & 4 closed 3.52v Pins 5 & 6 closed