AST RESEARCH, INC. POWER PREMIUM 486SX/25 (MODEL 202441-001) Processor 80486SX/80487SX (on external CPU/Memory module) Processor Speed 25MHz Chip Set AST Max. Onboard DRAM None (16MB on external CPU/Memory module) Cache None BIOS AST Dimensions 344mm x 250mm I/O Options 32-bit external CPU/Memory module slot 32-bit external Memory module slot (2) bus mouse port, floppy drive interface IDE interface, parallel port, serial port (2), SVGA port NPU Options 4167 (on external CPU/Memory module) [Image] CONNECTIONS Purpose Location Purpose Location SVGA port CN1 Third floppy drive J25 interface Bus mouse port CN2 External battery J26 Serial port 1 (COM1) CN3 Speaker J27 Serial port 2 (COM2) CN4 Fan power J28 Parallel port J13 Front panel switches J29 & LEDs VGA pass-through J19 IDE interface LED J40 IDE interface J22 32-bit external S1 CPU/Memory module Floppy drive interface J24 32-bit external S2 & S3 Memory module slots USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » CMOS memory normal operation SW1/switch 1 open CMOS memory clear SW1/switch 1 closed » Password check enabled SW1/switch 2 open Password check disabled SW1/switch 2 closed » Flash BIOS write disabled SW1/switch 3 open Flash BIOS write enabled SW1/switch 3 closed » VGA port enabled SW1/switch 4 closed VGA port disabled SW1/switch 4 open » Factory configured - do not E1 closed alter » Factory configured - do not E2 pins 1 & 2 alter closed » Factory configured - do not E3 closed alter » Factory configured - do not E4 open alter » Factory configured - do not E5 open alter [Image] USER CONFIGURABLE SETTINGS Function Jumper Position » Parity check enabled E1 closed Parity check disabled E1 open » Factory configured - do not alter E2 closed Note:AST CPU/Memory module part number is 202439-002. DRAM CONFIGURATION Size Bank 0 Bank 1 2MB (2) 1M x 9 NONE 4MB (2) 1M x 9 (2) 1M x 9 8MB (2) 4M x 9 NONE 10MB (2) 1M x 9 (2) 4M x 9 16MB (2) 4M x 9 (2) 4M x 9 Notes:128KB of DRAM is reserved for System and VGA BIOS shadowing and cannot be disabled. Up to two of the following memory boards may be installed in addition to the CPU/Memory module: AST part numbers 202275-004, 202275-006, 202387-001, or 202387-005.