AST RESEARCH, INC. ADVANTAGE PLUS! SERIES 486 (MT) (202528-101) Processor 80486SX/80487SX/ODP486/ODPR486/80486DX/80486DX2/P24T Processor 25/33/50(internal)/66(internal)MHz Speed Chip Set Unidentified Max. Onboard 64MB DRAM Cache 64/256KB BIOS AST Dimensions 355mm x 305mm I/O Options Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), 8514 video pass through connector, VGA port NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location VGA port CN1 Reset switch E3 Serial port CN2 IDE interface LED E4 Serial port CN3 8514 video pass J19 through connector PS/2 mouse port CN4 IDE interface J22 Parallel port CN5 Floppy drive J24 interface Power LED E1 Chassis fan power J28 USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » CMOS memory normal operation E5 Open CMOS memory clear E5 Closed » Factory configured - do not E14 Pins 1 & 2 alter closed » Parallel port IRQ select IRQ7 E15 Pins 1 & 2 closed Parallel port IRQ select IRQ5 E15 Pins 2 & 3 closed » Factory configured - do not E800 Pins 2 & 3 alter closed » Factory configured - do not E801 Pins 1 & 2 alter closed » Monitor power conservation E802 Pins 2 & 3 disabled closed Monitor power conservation E802 Pins 1 & 2 enabled closed » Factory configured - do not E803 Pins 1 & 2 alter closed » Factory configured - do not E804 Pins 1 & 2 alter closed » On board video enabled SW1/1 Off On board video disabled SW1/1 On » Factory configured - do not SW1/2 Off alter » Flash BIOS normal operation SW1/3 Off Flash BIOS force update at SW1/3 On boot » Password enabled SW1/4 Off Password disabled SW1/4 On » Monitor type select color SW1/5 On Monitor type select SW1/5 Off monochrome » Factory configured - do not SW1/6 Off alter » Factory configured - do not SW1/7 Off alter » Setup access enabled SW1/8 Off Setup access disabled SW1/8 On 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 3MB (1) 256K x (1) 256K x (1) 256K x None 36 36 36 4MB (1) 1M x 36 None None None 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 5MB (1) 1M x 36 (1) 256K x None None 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 6MB (1) 1M x 36 (1) 256K x (1) 256K x None 36 36 7MB (1) 1M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 8MB (1) 1M x 36 (1) 1M x 36 None None 9MB (1) 1M x 36 (1) 1M x 36 (1) 256K x None 36 10MB (1) 1M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 13MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 None None None 17MB (1) 4M x 36 (1) 256K x None None 36 18MB (1) 4M x 36 (1) 256K x (1) 256K x None 36 36 19MB (1) 4M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 20MB (1) 4M x 36 (1) 1M x 36 None None 21MB (1) 4M x 36 (1) 1M x 36 (1) 256K x None 36 22MB (1) 4M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 None 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 32MB (1) 4M x 36 (1) 4M x 36 None None 33MB (1) 4M x 36 (1) 4M x 36 (1) 256K x None 36 34MB (1) 4M x 36 (1) 4M x 36 (1) 256K x (1) 256K x 36 36 36MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 None 37MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 (1) 256K x 36 40MB (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 None 49MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 256K x 36 52MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 1M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CACHE CONFIGURATION Size Bank 0 TAG 64KB (8) 8K x 8 (1) 8K x 9 256KB (8) 32K x 8 (1) 32K x 9 CACHE JUMPER CONFIGURATION Size E6 E7 E8 None Pins 1 & 2 Open Open closed 64KB Pins 1 & 2 Open Open closed 256KB Pins 2 & 3 Closed Closed closed CPU TYPE CONFIGURATION Type E9 E10 E11 E12 E13 80486SX Open 2 & 3 1 & 2 Open 2 & 3 80487SX 1 & 2 1 & 2 2 & 3 Closed 2 & 3 ODP486 1 & 2 1 & 2 2 & 3 Closed 2 & 3 ODPR486 2 & 3 1 & 2 1 & 2 Closed 2 & 3 80486DX 2 & 3 1 & 2 1 & 2 Closed 2 & 3 80486DX2 2 & 3 1 & 2 1 & 2 Closed 2 & 3 P24T 1 & 2 1 & 2 2 & 3 Closed 1 & 2 Note: Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed E16 25MHz Open 33MHz Closed 50iMHz Open 66iMHz Closed VIDEO MEMORY CONFIGURATION Size Bank 0 Bank 1 Bank 2 512KB (1) 256K x 16 None None 1MB (1) 256K x 16 (1) 256K x 16 None 2MB (1) 256K x 16 (1) 256K x 16 (2) 256K x 16 Note: Bank 0 is factory installed and is not configurable. MISCELLANEOUS TECHNICAL NOTE Note: The location of pin 1 is unidentified.