J-MARK COMPUTER CORPORATION J-591A Device Type Mainboard Processor CX 6X86/IBM 6X86/CX 686MX/IDT C6/AM K5/AM K6/Pentium/Pentium MMX Processor Speed 90/100/120/133/150/166/180/200/233/266/300MHz Chip Set SIS 5591 Maximum Onboard 256MB (EDO & SDRAM supported) Memory Cache 512KB BIOS Unidentified Dimensions 235mm x 220mm 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, AGP slot [Image] CONNECTIONS Purpose Location Purpose Location AGP slot AGP Serial port 2 CN1 ATX power connector ATX Serial port 1 CN2 Turbo LED C1 IDE interface 2 CN3 Reset switch C2 IDE interface 1 CN4 Speaker C3 Floppy drive CN5 interface Turbo switch C4 Parallel port CN6 Power LED & keylock C5 IR connector IR1 IDE interface LED C6 PS/2 mouse interface JP1 Soft off power supply C7 32-bit PCI slots PC1 – PC3 Chassis fan power C8 USB connector USB CPU fan power C9 SCSI interface USER CONFIGURABLE SETTINGS Function Label Position » Keyboard power on disabled JP2 Pins 2 & 3 closed Keyboard power on enabled JP2 Pins 1 & 2 closed » CMOS memory normal operation JP4 Pins 1 & 2 closed CMOS memory clear JP4 Pins 2 & 3 closed » Factory configured - do not JP8 Unidentified alter » Factory configured - do not JP9 Unidentified alter 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 256MB (2) 32M 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 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 512KB (1) 64K x 64 (1) 32K x 8 CPU SPEED SELECTION (CX 6X86) CPU Clock Multiplier U4/1 U4/2 U4/3 U4/4 U4/5 U4/6 speed speed 150MHz 60MHz 2x On Off Off On On On 166MHz 66MHz 2x On Off Off Off On On 200MHz 75MHz 2x On Off Off On On Off CPU SPEED SELECTION (IBM 6X86) CPU Clock Multiplier U4/1 U4/2 U4/3 U4/4 U4/5 U4/6 speed speed 150MHz 60MHz 2x On Off Off On On On 166MHz 66MHz 2x On Off Off Off On On 200MHz 75MHz 2x On Off Off On On Off CPU SPEED SELECTION (CX 6X86MX) CPU Clock Multiplier U4/1 U4/2 U4/3 U4/4 U4/5 U4/6 speed speed 166MHz 60MHz 2.5x On On Off Off On On 200MHz 66MHz 2.5x On On Off Off On On 200MHz 75MHz 2x On Off Off Off On Off 233MHz 66MHz 3x Off On Off On On On 233MHz 75MHz 2.5x On On Off On On Off CPU SPEED SELECTION (IDT C6) CPU Clock Multiplier U4/1 U4/2 U4/3 U4/4 U4/5 U4/6 speed speed 150MHz 75MHz 2x On Off Off On On Off 180MHz 60MHz 3x Off On Off On On On CPU SPEED SELECTION (AM K5) CPU Clock Multiplier U4/1 U4/2 U4/3 U4/4 U4/5 U4/6 speed speed 90MHz 60MHz 1.5x Off Off Off On On On 100MHz 66MHz 1.5x Off Off Off Off On On 133MHz 66MHz 1.5x Off Off Off Off On On 166MHz 66MHz 2.5x On On Off Off On On CPU SPEED SELECTION (AM K6) CPU Clock Multiplier U4/1 U4/2 U4/3 U4/4 U4/5 U4/6 speed speed 166MHz 66MHz 2.5x On On Off Off On On 200MHz 66MHz 3x Off On Off Off On On 233MHz 66MHz 3.5x Off Off Off Off On On 266MHz 66MHz 4x On Off On Off On On 300MHz 66MHz 4.5x On On On Off On Off CPU SPEED SELECTION (INTEL) CPU Clock Multiplier U4/1 U4/2 U4/3 U4/4 U4/5 U4/6 speed speed 90MHz 60MHz 1.5x Off Off Off On On On 100MHz 66MHz 1.5x Off Off Off Off On On 120MHz 60MHz 2x On Off Off On On On 133MHz 66MHz 2x On Off Off Off On On 150MHz 60MHz 2.5x On On Off On On On 166MHz 66MHz 2.5x On On Off Off On On 200MHz 66MHz 3x Off On Off Off On On CPU SPEED SELECTION (INTEL MMX) CPU Clock Multiplier U4/1 U4/2 U4/3 U4/4 U4/5 U4/6 speed speed 166MHz 66MHz 2.5x On On Off Off On On 200MHz 66MHz 3x Off On Off Off On On 233MHz 66MHz 3.5x Off Off Off Off On On CPU VOLTAGE SELECTION Voltage JP10 2.2v Pins 1 & 2 closed 2.8v Pins 3 & 4 closed 2.9v Pins 5 & 6 closed 3.2v Pins 7 & 8 closed 3.3v Pins 9 & 10 closed 3.45v Pins 11 & 12 closed 3.52v Pins 13 & 14 closed