J-MARK COMPUTER CORPORATION J-656HXA Processor Pentium Processor Speed 75/90/100/120/133/150/166/200MHz Chip Set Intel Video Chip Set None Maximum Onboard 384MB Memory Maximum Video Memory None Cache 256/512KB BIOS Award Dimensions 280mm 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 Reset switch J5 Serial port 2 CN2 IDE interface LED J6 Floppy drive interface CN3 Power LED & keylock J7 Parallel port CN4 Turbo LED J8 IDE interface 2 CN5 Green PC connector JP16 IDE interface 1 CN6 Chassis fan power JP36 PS/2 mouse interface J2 IR connector JP37 Speaker J4 32-bit PCI slots PC1 – PC3 USER CONFIGURABLE SETTINGS Function Label Position » CMOS memory normal operation J12 Pins 2 & 3 closed CMOS memory clear J12 Pins 3 & 4 closed Monitor type select color JP2 Closed Monitor type select monochrome JP2 Open PS/2 mouse IRQ12 enabled JPS1 Closed PS/2 mouse IRQ12 disabled JPS1 Open Flash BIOS voltage select 12v JP17 Pins 1 & 2 closed Flash BIOS voltage select 5v JP17 Pins 2 & 3 closed » Factory configured - do not JP26 Unidentified alter » Factory configured - do not JP30 Unidentified alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 8MB (2) 1M x 36 None None 16MB (2) 2M x 36 None None 16MB (2) 1M x 36 (2) 1M x 36 None 24MB (2) 1M x 36 (2) 2M x 36 None 24MB (2) 1M x 36 (2) 1M x 36 (2) 1M x 36 24MB (2) 2M x 36 (2) 1M x 36 None 32MB (2) 4M x 36 None None 32MB (2) 1M x 36 (2) 1M x 36 (2) 2M x 36 32MB (2) 2M x 36 (2) 2M x 36 None 40MB (2) 1M x 36 (2) 4M x 36 None 48MB (2) 1M x 36 (2) 1M x 36 (2) 4M x 36 48MB (2) 2M x 36 (2) 4M x 36 None 48MB (2) 2M x 36 (2) 2M x 36 (2) 2M x 36 64MB (2) 8M x 36 None None 64MB (2) 2M x 36 (2) 2M x 36 (2) 4M x 36 64MB (2) 4M x 36 (2) 4M x 36 None 72MB (2) 1M x 36 (2) 8M x 36 None DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 72MB (2) 4M x 36 (2) 4M x 36 (2) 1M x 36 80MB (2) 1M x 36 (2) 1M x 36 (2) 8M x 36 80MB (2) 2M x 36 (2) 8M x 36 None 80MB (2) 4M x 36 (2) 4M x 36 (2) 2M x 36 96MB (2) 2M x 36 (2) 2M x 36 (2) 8M x 36 96MB (2) 4M x 36 (2) 8M x 36 None 96MB (2) 4M x 36 (2) 4M x 36 (2) 4M x 36 128MB (2) 16M x 36 None None 128MB (2) 4M x 36 (2) 4M x 36 (2) 8M x 36 128MB (2) 8M x 36 (2) 8M x 36 None 136MB (2) 1M x 36 (2) 16M x 36 None 136MB (2) 8M x 36 (2) 8M x 36 (2) 1M x 36 144MB (2) 1M x 36 (2) 1M x 36 (2) 16M x 36 144MB (2) 2M x 36 (2) 16M x 36 None 144MB (2) 8M x 36 (2) 8M x 36 (2) 2M x 36 160MB (2) 2M x 36 (2) 2M x 36 (2) 16M x 36 160MB (2) 4M x 36 (2) 16M x 36 None 160MB (2) 8M x 36 (2) 8M x 36 (2) 4M x 36 192MB (2) 4M x 36 (2) 4M x 36 (2) 16M x 36 192MB (2) 8M x 36 (2) 16M x 36 None 192MB (2) 8M x 36 (2) 8M x 36 (2) 8M x 36 256MB (2) 8M x 36 (2) 8M x 36 (2) 16M x 36 264MB (2) 16M x 36 (2) 16M x 36 (2) 1M x 36 272MB (2) 16M x 36 (2) 16M x 36 (2) 2M x 36 288MB (2) 16M x 36 (2) 16M x 36 (2) 4M x 36 320MB (2) 16M x 36 (2) 16M x 36 (2) 8M x 36 384MB (2) 16M x 36 (2) 16M x 36 (2) 16M x 36 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) (2) 64K x 32 Not installed (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP19 JP20 JP35 256KB (A) Pins 1 & 2 Pins 2 & 3 Pins 1 & 2 closed closed closed 256KB (B) Pins 1 & 2 Pins 2 & 3 Pins 1 & 2 closed closed closed 512KB (A) Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed 512KB (B) Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed CPU SPEED SELECTION CPU speed Clock Multiplier JP22 JP23 JP41 speed 75MHz 50MHz 1.5x Open Open 1 & 2, 3 & 4 90MHz 60MHz 1.5x Open Open 1 & 2 100MHz 66MHz 1.5x Open Open 3 & 4 120MHz 60MHz 2x Closed Open 1 & 2 133MHz 66MHz 2x Closed Open 3 & 4 150MHz 60MHz 2.5x Closed Closed 1 & 2 166MHz 66MHz 2.5x Closed Closed 3 & 4 200MHz 66MHz 3x Open Closed 3 & 4 Note: Pins designated should be in the closed position. CPU VOLTAGE SELECTION Voltage JP32 JP33 JP34 3.3v Closed Open Open 3.45v Open Closed Open 3.52v Open Open Closed