MITAC INTERNATIONAL CORPORATION IH4077D Processor 80486SX/CXM7/80486DX/80486DX2/80486DX4/P23N/P24D/Pentium Overdrive Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz Speed Chip Set EFAR Max. 64MB Onboard DRAM Cache 64/128/256KB BIOS Award Dimensions 254mm x 218mm I/O 32-bit VESA local bus slots (2), floppy drive interface, IDE Options interface, parallel port, serial ports (2) NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location IDE interface CN1 Turbo switch JP45 Floppy drive CN2 Reset switch JP46 interface Serial port 2 J9 Power LED & keylock JP49 Serial port 1 J10 Speaker JP50 Parallel port J11 IDE interface LED JP51 External battery JP7 D/D board connector JP200 Turbo LED JP21 32-bit VESA local bus SL1 & SL2 slots USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not JP1 N/A alter » Factory configured - do not JP2 N/A alter » Factory configured - do not JP3 N/A alter » CMOS memory normal operation JP4 pins 2 & 3 closed CMOS memory clear JP4 pins 1 & 2 closed » Factory configured - do not JP5 N/A alter » Factory configured - do not JP6 N/A alter » Parallel port IRQ select IRQ7 JP13 pins 2 & 3 closed Parallel port IRQ select IRQ5 JP13 pins 1 & 2 closed » Factory configured - do not JP14 N/A alter » Factory configured - do not JP15 N/A alter » Factory configured - do not JP17 N/A alter » Factory configured - do not JP23 N/A alter » Factory configured - do not JP33 N/A alter » Factory configured - do not JP48 N/A alter » BIOS type select normal JP130 pins 1 & 2 closed BIOS type select flash JP130 pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x NONE NONE NONE 36 2MB (1) 256K x (1) 256K x NONE NONE 36 36 2MB (1) 512K x NONE NONE NONE 36 3MB (1) 256K x (1) 256K x (1) 256K x NONE 36 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB (1) 512K x NONE (1) 512K x NONE 36 36 4MB (1) 1M x 36 NONE NONE NONE 5MB (1) 256K x (1) 1M x 36 NONE NONE 36 6MB (1) 512K x NONE (1) 1M x 36 NONE 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 8MB (1) 2M x 36 NONE NONE NONE 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 2M x 36 NONE (1) 2M x 36 NONE 16MB (1) 4M x 36 NONE NONE NONE 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB (1) 8M x 36 NONE NONE NONE 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 8M x 36 NONE (1) 8M x 36 NONE CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 NONE (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 Note: The orientation of the banks is unidentified. Bank 0 = U23, 25, 27, & 29. Bank 1 = U24, 26, 28, & 30. CACHE JUMPER CONFIGURATION Size JP8 JP9 JP10 JP11 JP12 64KB Open Open Open pins 1 & 2 pins 1 & 2 closed closed 128KB Closed Closed Open pins 2 & 3 pins 2 & 3 closed closed 256KB Closed Closed Closed pins 1 & 2 pins 1 & 2 closed closed CPU TYPE CONFIGURATION Type JP16 JP18 JP24 JP27 JP28 JP29 80486SX Closed Open Open Open Closed Open CX M7 Open Closed Closed Closed Open Closed 80486DX Closed Open Open Open Closed Open 80486DX2 Closed Open Open Open Closed Open 80486DX4 Closed Open Open Open Closed Open P23N Closed Open Open Open Closed Open P24D Open Closed Closed Open Closed Open P24T Open Closed Closed Open Closed Open CPU TYPE CONFIGURATION (CON’T) Type JP34 JP35 JP38 JP39 JP40 JP41 80486SX Closed Closed Closed Open Open 2 & 3 CX M7 Open Open Open Closed 2 & 3 1 & 2 80486DX Closed Closed Closed Closed 2 & 3 1 & 2 80486DX2 Closed Closed Closed Closed 2 & 3 1 & 2 80486DX4 Closed Closed Closed Closed 2 & 3 1 & 2 P23N Closed Closed Closed Closed 1 & 2 1 & 2 P24D Open Open Open Closed 2 & 3 1 & 2 P24T Open Open Open Closed 1 & 2 1 & 2 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CON’T) Type JP42 JP43 JP44 JP47 JP110 80486SX 2 & 3 2 & 3 2 & 3 Open Open CX M7 1 & 2 1 & 2 1 & 2 Closed Closed 80486DX 2 & 3 2 & 3 2 & 3 Open Open 80486DX2 2 & 3 2 & 3 2 & 3 Open Open 80486DX4 2 & 3 2 & 3 2 & 3 Open Open P23N 2 & 3 2 & 3 2 & 3 Open Open P24D 2 & 3 2 & 3 2 & 3 Closed Open P24T 2 & 3 2 & 3 2 & 3 Open Open Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION (CX M7 ONLY) Type JP25 CX486DX Open CX486DX2 Closed CPU SPEED CONFIGURATION Speed JP30 JP31 JP32 25MHz Closed Open Open 33MHz Closed Closed Closed 40MHZ Closed Closed Open 50iMHz Closed Open Open 50MHz Open Open Closed 66iMHz Closed Closed Closed 75iMHz Closed Open Open 100iMHz Closed Closed Closed CPU SPEED CONFIGURATION (80486DX4 ONLY) Speed JP22 JP26 1x N/A Open 2x Closed N/A 2.5x N/A N/A 3x Open Closed VESA WAIT STATE CONFIGURATION Wait states JP37 0 wait states pins 1 & 2 closed 1 wait state pins 2 & 3 closed BUS SPEED CONFIGURATION CPU speed JP36 <= 33MHz pins 1 & 2 closed > 33MHz pins 2 & 3 closed