AST RESEARCH, INC. ADVANTAGE! PRO 4/25S Processor 80486SX/ODP486/80487SX/ODPR486/80486DX/80486DX2/P24T Processor 25/33/50(internal)/66(internal)MHz Speed Chip Set Unidentified Video Chip SetCirrus Logic Maximum 64MB Onboard Memory Maximum Video 1MB Memory Cache 64/256KB BIOS Unidentified Dimensions 355mm x 304mm 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 PS/2 mouse port CN1 8514 video pass J19 through connector Serial port CN2 IDE interface J22 Serial port CN3 Floppy drive J24 interface Parallel port CN4 Chassis fan power J28 VGA port CN5 Front panel LEDs J29 USER CONFIGURABLE SETTINGS Function Label Position » Monitor type select color E4 Closed Monitor type select monochrome E4 Open » On board video enabled E5 Closed On board video disabled E5 Open » Password normal operation E6 Closed Password clear E6 Open » Parallel port IRQ select IRQ7 E12 Pins 1 & 2 closed Parallel port IRQ select IRQ5 E12 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 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) 1M x 36 None None None 5MB (1) 1M x 36 (1) 256K x None None 36 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 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 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 25MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 256K x 36 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 8 256KB (8) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size E1 E2 E3 None Open Open Open 64KB Open Open Open 256KB Closed Closed Closed VIDEO MEMORY CONFIGURATION Size Bank 0 Bank 1 512KB (4) 256K x 4 None 1MB (4) 256K x 4 (4) 256K x 4 Note: Bank 0 is factory installed and is not configurable. CPU SPEED SELECTION Speed E9 E10 25MHz Closed Closed 33MHz Open Closed 50iMHz Closed Closed 66iMHz Open Closed CPU TYPE SELECTION Type E11 E13 E14 E15 E16 E17 80486SX Open Open 1 & 2 1 & 2 1 & 2 1 & 2 (PQFP) 80486SX Closed Open 1 & 2 1 & 2 1 & 2 1 & 2 (PGA) ODP486 Closed Closed 1 & 2 1 & 2 2 & 3 1 & 2 80487SX Closed Closed 1 & 2 1 & 2 2 & 3 1 & 2 ODPR486 Closed Closed 2 & 3 1 & 2 2 & 3 1 & 2 80486DX Closed Closed 2 & 3 1 & 2 2 & 3 1 & 2 80486DX2 Closed Closed 2 & 3 1 & 2 2 & 3 1 & 2 P24T Closed Closed 2 & 3 2 & 3 2 & 3 Open Note: Pins designated should be in the closed position. The location of the PQFP socket is unidentified.