J-MARK COMPUTER CORPORATION J-656C Processor CX M1/Pentium Processor Speed 75/90/100/120/133/150/166/180/200MHz Chip Set Intel Video Chip Set None Maximum Onboard 128MB (EDO supported) Memory Maximum Video None Memory Cache 256/512KB BIOS Award Dimensions 255mm x 220mm I/O Options 32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), cache slot NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location IDE interface 2 J1 IDE interface LED JP6 pins 14 & 15 IDE interface 1 J2 Turbo switch JP6 pins 18 & 19 Serial port 2 J7 Reset switch JP6 pins 22 & 23 Serial port 1 J8 Turbo LED JP6 pins 25 & 26 Floppy drive J9 Parallel port JP15 interface Power LED & JP6 pins 1 - 32-bit PCI slots PC1 – PC4 keylock 5 Green PC connector JP6 pins 7 & PS/2 mouse PS2 8 interface Speaker JP6 pins 10 - Cache slot SL1 13 USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not J5 Unidentified alter » CMOS memory normal operation JP3 Open CMOS memory clear JP3 Closed Flash BIOS voltage select 12v JP5 Pins 1 & 2 closed Flash BIOS voltage select 5v JP5 Pins 2 & 3 closed » ISA clock select PCI CLK/4 JP8 Pins 2 & 3 closed ISA clock select PCI CLK/3 JP8 Pins 1 & 2 closed » Factory configured - do not JP13 Unidentified alter » Factory configured - do not JV1 Unidentified alter » Factory configured - do not JW1 Unidentified alter » Factory configured - do not JW2 Unidentified alter DRAM CONFIGURATION Size Bank 0 Bank 1 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 128MB (2) 8M x 36 (2) 8M x 36 Note: Board accepts EDO memory. Board also accepts x 32 SIMMs. Banks are interchangeable at 64MB and above. 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 JC1 JC2 JT2 JX2 256KB (A) Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed 256KB (B) N/A N/A N/A N/A 512KB (A) Pins 2 & 3 Pins 1 & 2 Pins 2 & 3 Pins 1 & 2 closed closed closed closed 512KB (B) N/A N/A N/A N/A CACHE TYPE CONFIGURATION Type JP101 Asynchronous Closed Synchronous Open CPU SPEED SELECTION (CYRIX) CPU speed Clock Multiplier JF1 J1 J3 speed 120MHz 50MHz 2x 3 & 4 Closed Open 150MHz 60MHz 2x 1 & 2 Closed Open 166MHz 66MHz 2x Open Closed Open Note: Pins designated should be in the closed position. CPU SPEED SELECTION (INTEL) CPU speed Clock Multiplier JF1 J1 J3 speed 75MHz 50MHz 1.5x 3 & 4 Open Open 90MHz 60MHz 1.5x 1 & 2 Open Open 100MHz 66MHz 1.5x Open Open Open 120MHz 60MHz 2x 1 & 2 Closed Open 133MHz 66MHz 2x Open Closed Open 150MHz 60MHz 2.5x 1 & 2 Closed Closed 166MHz 66MHz 2.5x Open Closed Closed 180MHz 60MHz 3x 1 & 2 Open Closed 200MHz 66MHz 3x Open Open Closed Note: Pins designated should be in the closed position. CPU VOLTAGE SELECTION Voltage JV2 3.3v Pins 1 & 2 closed » 3.45v Pins 3 & 4 closed 3.6v Pins 5 & 6 closed CPU CLOCK TOLERANCE SELECTION Tolerance JP7 3.3v Pins 2 & 3 closed » 5v Pins 1 & 2 closed