AST RESEARCH, INC. PREMMIA SYSTEM BOARD (P/N202514-00X) Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium Processor 25/33/50(internal)/66(internal)MHz Speed Chip Set ATI Max. Onboard 128MB DRAM Cache 64/256KB (Located on the external cache module) BIOS AST Dimensions 355mm x 304mm I/O Options Cache/Pentium upgrade module, floppy drive interface (2), IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, video port NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Bus mouse port J12 Manufacturer’s test J23 header Parallel port J13 Floppy drive interface J24 1 & 2 Serial port 1 J14 Floppy drive interface J25 3 Personality/feature J15 External battery J26 connector Personality/feature J16 Speaker J27 connector Pentium/Cache module J17 Chassis fan power J28 upgrade SVGA monitor port J18 Front console header J29 VGA port J19 Manufacturer’s test J30 header Serial port 2 J20 IDE interface LED J35 IDE interface J22 Personality/feature J46 connector Note:The personality/feature connectors alow various network modules to be added to the system. USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Factory configured - do not E2 Open alter » Pariity checking enabled E3 Closed Pariity checking disabled E3 Open » Flash BIOS voltage 12V E5 pins 2 & 3 closed Flash BIOS voltage 5V E5 pins 1 & 2 open » VGA enabled SW1/switch 1 On VGA disabled SW1/switch 1 Off » Factory configured - do not SW1/switch 2 N/A alter » CMOS memory normal operation SW1/switch 3 Off CMOS memory clear SW1/switch 3 On » BIOS normal operation SW1/switch 4 Off BIOS forced update SW1/switch 4 On » Password override SW1/switch 5 Off Password inhibited SW1/switch 5 On » Factory configured - do not SW1/switch 6 Off alter » Factory configured - do not SW1/switch 7 Off alter » Factory configured - do not SW1/switch 8 Off alter » Factory configured - do not SW1/switch 9 Off alter » Monitor type select color SW1/switch 10 On Monitor type select SW1/switch 10 Off monochrome DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 2MB (1) 1M x 36 (1) 1M x 36 NONE NONE 4MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 4MB (1) 2M x 36 (1) 2M x 36 NONE NONE 6MB (1) 1M x 36 (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 8MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 8MB (1) 4M x 36 (1) 4M x 36 NONE NONE 10MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 12MB (1) 2M x 36 (1) 2M x 36 (1) 4M x 36 (1) 4M x 36 16MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 16MB (1) 8M x 36 (1) 8M x 36 NONE NONE 18MB (1) 1M x 36 (1) 1M x 36 (1) 8M x 36 (1) 8M x 36 20MB (1) 2M x 36 (1) 2M x 36 (1) 8M x 36 (1) 8M x 36 24MB (1) 4M x 36 (1) 4M x 36 (1) 8M x 36 (1) 8M x 36 32MB (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 (1) 8M x 36 32MB (1) 16M x 36 (1) 16M x 9 NONE NONE 34MB (1) 1M x 36 (1) 1M x 36 (1) 16M x 36 (1) 16M x 36 36MB (1) 2M x 36 (1) 2M x 36 (1) 16M x 36 (1) 16M x 36 40MB (1) 4M x 36 (1) 4M x 36 (1) 16M x 36 (1) 16M x 36 48MB (1) 8M x 36 (1) 8M x 36 (1) 16M x 36 (1) 16M x 36 64MB (1) 16M x 36 (1) 16M x 36 (1) 16M x 36 (1) 16M x 36 64MB (1) 32M x 36 (1) 32M x 36 NONE NONE 66MB (1) 1M x 36 (1) 1M x 36 (1) 32M x 36 (1) 32M x 36 68MB (1) 2M x 36 (1) 2M x 36 (1) 32M x 36 (1) 32M x 36 72MB (1) 4M x 36 (1) 4M x 36 (1) 32M x 36 (1) 32M x 36 80MB (1) 8M x 36 (1) 8M x 36 (1) 32M x 36 (1) 32M x 36 96MB (1) 16M x 36 (1) 16M x 36 (1) 32M x 36 (1) 32M x 36 128MB (1) 32M x 36 (1) 32M x 36 (1) 32M x 36 (1) 32M x 36 CPU TYPE CONFIGURATION PQFP PGA Pentium E1 E4 E6 E7 80486SX None None pins pins pins pins 2 & 3 1 & 2 1 & 2 1 & 2 80486SX 80487SX None pins pins pins pins 2 & 3 1 & 2 1 & 2 1 & 2 80486SX ODP486SX None pins pins pins pins 2 & 3 1 & 2 1 & 2 1 & 2 80486SX 80486DX/80486DX2 None pins pins pins pins 1 & 2 2 & 3 1 & 2 1 & 2 80486DX None None pins pins pins pins 2 & 3 1 & 2 1 & 2 1 & 2 80486DX 80486DX/80486DX2 None pins pins pins pins 1 & 2 2 & 3 1 & 2 1 & 2 80486DX ODP486SX None pins pins pins pins 2 & 3 1 & 2 1 & 2 1 & 2 None 80486SX None Open Open pins pins 2 & 3 2 & 3 None 80486DX/80486DX2 None Open pins pins pins 2 & 3 1 & 2 1 & 2 None ODP486SX None Open pins pins pins 1 & 2 1 & 2 1 & 2 Any None Yes pins pins pins pins 2 & 3 1 & 2 1 & 2 1 & 2 None None Yes Open pins pins pins 1 & 2 1 & 2 1 & 2 Note:Pins designated should be in the closed position. Before installing the Pentium upgrade board, remove the processor in the ZIF socket at U13. VIDEO MEMORY CONFIGURATION Size Bank 0 Bank 1 1MB (2) 46256 (2) 46256 2MB (2) 46256 (2) 46256