AST RESEARCH, INC. ADVANTAGE! 8000 SERIES 486 (COBRA) (202695-1X1) Processor 80486SX/486 Overdrive/80486DX/80486DX2/80486DX4/Pentium Overdrive Processor 25/33/50(internal)/66(internal)/100(internal)MHz Speed Chip Set Unidentified Max. Onboard 128MB DRAM Cache 64/256KB BIOS Unidentified Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), 8514 video pass through, VGA port, riser slot NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse port CN2 External battery J26 Serial port CN3 Speaker J27 Serial port CN4 Chassis fan power J28 Parallel port CN5 Front console LED J29 VGA port CN6 Chassis fan power J32 8514 video pass J19 IDE interface LED J40 through connector IDE interface J22 Riser slot SL1 Floppy drive J24 interface USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Factory configured - do not E6 pins 1 & 2 alter closed » CMOS memory normal operation E8 Open CMOS memory clear E8 Closed » Video memory enabled E800 Closed » Flash BIOS normal operation SW1/1 Off Flash BIOS force update at SW1/1 On boot » Password enabled SW1/2 On Password disabled SW1/2 Off » Monitor type select color SW1/3 On Monitor type select SW1/3 Off monochrome » Setup access enabled SW1/4 Off Setup access disabled SW1/4 On » On board video enabled SW1/5 On On board video disabled SW1/5 Off » Factory configured - do not SW1/6 On alter » Factory configured - do not SW1/7 On alter » Factory configured - do not SW1/8 On alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 4MB (1) 1M x 32 NONE NONE NONE 8MB (1) 2M x 32 NONE NONE NONE 8MB (1) 1M x 32 (1) 1M x 32 NONE NONE 9MB (1) 1M x 32 (1) 1M x 32 (1) 256K x NONE 32 10MB (1) 1M x 32 (1) 1M x 32 (1) 256K x (1) 256K x 32 32 12MB (1) 1M x 32 (1) 1M x 32 (1) 1M x 32 NONE 16MB (1) 1M x 32 (1) 1M x 32 (1) 1M x 32 (1) 1M x 32 16MB (1) 4M x 32 NONE NONE NONE 17MB (1) 2M x 32 (1) 2M x 32 (1) 256K x NONE 32 18MB (1) 2M x 32 (1) 2M x 32 (1) 256K x (1) 256K x 32 32 20MB (1) 2M x 32 (1) 2M x 32 (1) 1M x 32 NONE 24MB (1) 2M x 32 (1) 2M x 32 (1) 1M x 32 (1) 1M x 32 24MB (1) 2M x 32 (1) 2M x 32 (1) 2M x 32 NONE 32MB (1) 2M x 32 (1) 2M x 32 (1) 2M x 32 (1) 2M x 32 32MB (1) 8M x 32 NONE NONE NONE 32MB (1) 4M x 32 (1) 4M x 32 NONE NONE 33MB (1) 4M x 32 (1) 4M x 32 (1) 256K x NONE 32 34MB (1) 4M x 32 (1) 4M x 32 (1) 256K x (1) 256K x 32 32 36MB (1) 4M x 32 (1) 4M x 32 (1) 1M x 32 NONE 40MB (1) 4M x 32 (1) 4M x 32 (1) 1M x 32 (1) 1M x 32 40MB (1) 4M x 32 (1) 4M x 32 (1) 2M x 32 NONE DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 48MB (1) 4M x 32 (1) 4M x 32 (1) 2M x 32 (1) 2M x 32 48MB (1) 4M x 32 (1) 4M x 32 (1) 4M x 32 NONE 64MB (1) 4M x 32 (1) 4M x 32 (1) 4M x 32 (1) 4M x 32 64MB (1) 8M x 32 (1) 8M x 32 NONE NONE 66MB (1) 8M x 32 (1) 8M x 32 (1) 256K x (1) 256K x 32 32 68MB (1) 8M x 32 (1) 8M x 32 (1) 1M x 32 NONE 72MB (1) 8M x 32 (1) 8M x 32 (1) 1M x 32 (1) 1M x 32 72MB (1) 8M x 32 (1) 8M x 32 (1) 2M x 32 NONE 80MB (1) 8M x 32 (1) 8M x 32 (1) 2M x 32 (1) 2M x 32 80MB (1) 8M x 32 (1) 8M x 32 (1) 4M x 32 NONE 96MB (1) 8M x 32 (1) 8M x 32 (1) 4M x 32 (1) 4M x 32 96MB (1) 8M x 32 (1) 8M x 32 (1) 8M x 32 NONE 128MB (1) 8M x 32 (1) 8M x 32 (1) 8M x 32 (1) 8M x 32 CACHE CONFIGURATION Note: The location and chips sizes of 64/256KB cache is unidentified. CACHE JUMPER CONFIGURATION Size E5 64KB Open 256KB Closed CPU TYPE CONFIGURATION Type E1 E2 E3 E10 80486SX (PQFP) Open pins 2 & 3 pins 1 & 2 Closed closed closed ODP486SX Open pins 2 & 3 pins 1 & 2 Closed closed closed 80486DX Open pins 1 & 2 pins 1 & 2 Closed closed closed 80486DX2 Open pins 1 & 2 pins 1 & 2 Closed closed closed 80486DX2 (WB) Open pins 1 & 2 pins 2 & 3 Open closed closed 80486DX4 Open pins 1 & 2 pins 1 & 2 Closed closed closed Pentium Open pins 2 & 3 pins 2 & 3 Open Overdrive closed closed Note: E10 is not on all boards. CPU SPEED CONFIGURATION Speed E7 E9 25MHz pins 1 & 2 closed Closed 33MHz pins 2 & 3 closed Open 50iMHz pins 1 & 2 closed Closed 66iMHz pins 2 & 3 closed Open 100iMHz pins 1 & 2 closed Closed CPU SPEED CONFIGURATION (80486DX4 ONLY) Voltage E4 2x pins 2 & 3 closed 2.5x pins 1 & 2 closed 3x Open CPU VOLTAGE CONFIGURATION Voltage E11 E12 E13 E14 E15 E16 3v Cyrix 2 & 3 2 & 3 2 & 3 2 & 3 Open 1 & 2 3v Intel 1 & 2 1 & 2 1 & 2 1 & 2 Closed 2 & 3 5v Cyrix 2 & 3 2 & 3 2 & 3 2 & 3 Open Open 5v Intel 1 & 2 1 & 2 1 & 2 1 & 2 Closed Open Note: Pins designated should be in the closed position. The location of E12 is unidentified. VIDEO MEMORY CONFIGURATION 1024KB is factory installed and is not configurable.