APRICOT COMPUTERS LIMITED XEN-PC/PCM Processor CX486M6/CX486CXM6 &C6/80486SX/CX486M7/80486DX/80486DX2/Pentium Overdrive/Pentium Processor 25/33/40/50(internal)/60/66(internal)/66MHz Speed Chip Set ALI/Intel/VLSI Max. Onboard 128MB DRAM Cache 64/128/256/512KB BIOS Unidentified Dimensions 330mm x 218mm I/O Options 32-bit PCI local bus slot (on riser card), floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location VGA port CN1 PS/2 mouse port CN5 Parallel port CN2 Floppy drive interface CN6 Serial port 1 CN3 IDE interface CN7 Serial port 2 CN4 Riser Card SL1 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not J10 Open alter » BIOS type select original JP1 Open BIOS type select OEM JP1 Closed » Security enabled JP2 pins 1 & 2 closed Security disabled JP2 pins 2 & 3 closed » Factory configured - do not JP3 Open alter » BIOS type select Flash JP4 pins 1 & 2 closed BIOS type select EPROM JP4 pins 2 & 3 closed » Floppy drive select normal JP5 pins 1 & 2 closed Floppy drive select 3 mode JP5 pins 2 & 3 closed » IDE I/O address select 03xH JP6 pins 1 & 2 closed IDE I/O address select 0BxH JP6 pins 2 & 3 closed » On board video disabled JP14 Open On board video enabled JP14 Closed » IDE interface enabled JP16 Open IDE interface disabled JP16 Closed » Factory configured - do not JP19 Open alter » Key select locked JP22 Open Key select unlocked JP22 Closed » On board memory enabled JP28 pins 1 & 2 closed On board memory disabled JP28 pins 2 & 3 closed Note: The location of JP2 is unknown. DRAM CONFIGURATION (NON PENTIUM) Size Bank 1 Bank 2 4MB NONE NONE 8MB NONE (1) 1M x 36 8MB (1) 1M x 36 NONE 12MB NONE (1) 2M x 36 12MB (1) 1M x 36 (1) 1M x 36 16MB (1) 1M x 36 (1) 2M x 36 20MB NONE (1) 4M x 36 20MB (1) 4M x 36 NONE 24MB (1) 1M x 36 (1) 4M x 36 24MB (1) 4M x 36 (1) 1M x 36 28MB (1) 4M x 36 (1) 2M x 36 36MB (1) 4M x 36 (1) 4M x 36 Note: Bank 0 contains 4MB & is factory installed. DRAM CONFIGURATION (PENTIUM) Size Bank 1 Bank 2 8MB NONE NONE 16MB (1) 1M x 36 (1) 1M x 36 16MB (1) 2M x 36 NONE 20MB (1) 1M x 36 (1) 2M x 36 24MB (1) 2M x 36 (1) 2M x 36 24MB (1) 4M x 36 NONE 28MB (1) 1M x 36 (1) 4M x 36 32MB (1) 2M x 36 (1) 4M x 36 40MB (1) 4M x 36 (1) 4M x 36 40MB (1) 8M x 36 NONE 44MB (1) 1M x 36 (1) 8M x 36 48MB (1) 2M x 36 (1) 8M x 36 56MB (1) 4M x 36 (1) 8M x 36 72MB (1) 8M x 36 (1) 8M x 36 72MB (1) 16M x 36 NONE 76MB (1) 1M x 36 (1) 16M x 36 80MB (1) 2M x 36 (1) 16M x 36 88MB (1) 4M x 36 (1) 16M x 36 104MB (1) 8M x 36 (1) 16M x 36 128MB (1) 16M x 36 (1) 16M x 36 Note: Bank 0 contains 8MB & is factory installed. When 128MB is installed, the on board memory is disabled. CACHE CONFIGURATION Note: The location and bank configuration of cache is unknown. CACHE JUMPER CONFIGURATION Size JP24 JP25 JP26 64KB Open Open pins 1 & 2 closed 128KB Open Closed pins 2 & 3 closed 256KB Closed Closed pins 1 & 2 closed Note: The jumper settings for 512KB cache is unknown. CPU TYPE CONFIGURATION Type JP11 JP12 JP13 JP15 JP18 JP20 JP27 CX486M6 2 & 3 1 & 2 2 & 3 2 & 3 2 & 3 1 & 2 Open CX486M7 2 & 3 1 & 2 1 & 2 2 & 3 2 & 3 2 & 3 Open CXM6 & C6 2 & 3 1 & 2 2 & 3 2 & 3 2 & 3 1 & 2 Open 80486 1 & 2 1 & 2 1 & 2 1 & 2 2 & 3 2 & 3 Open P24T 1 & 2 2 & 3 1 & 2 2 & 3 1 & 2 2 & 3 Closed Note: The jumper settings for the Pentium processor are unknown. Pins designated should be in the closed position. The location of JP18 is unknown. CPU SPEED CONFIGURATION Speed JP7 JP8 JP9 JP10 JP17 25MHz 2 & 3 2 & 3 1 & 2 2 & 3 2 & 3 33MHz 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 40MHz 1 & 2 1 & 2 2 & 3 1 & 2 1 & 2 50iMHz 2 & 3 2 & 3 1 & 2 2 & 3 2 & 3 50MHz 2 & 3 2 & 3 1 & 2 1 & 2 1 & 2 66iMHz 1 & 2 2 & 3 1 & 2 2 & 3 2 & 3 Note: The jumper settings for the Pentium processor are unknown. Pins designated should be in the closed position. MISCELLANEOUS TECHNICAL NOTE Note:Not all options listed in this document are available on each motherboard.