AST RESEARCH, INC. BRAVO LC (LC2) (202560-XXX) Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium Overdrive Processor 25/33/50(internal)/66(internal)MHz Speed Chip Set AST Max. Onboard 64MB DRAM Cache 64/256KB BIOS AST Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse port J12 Serial port 2 J20 Parallel port J13 IDE interface J22 Serial port 1 J14 Floppy drive interface J24 VGA port J18 Chassis fan power J28 VGA feature connector J19 Front panel connector J29 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select color E4 Closed Monitor type select monochrome E4 Open » Video adapter enabled E5 Closed Video adapter disabled E5 Open » CMOS memory normal operation E6 Closed CMOS memory clear E6 Open » Parallel port IRQ select IRQ7 E12 pins 1 & 2 closed Parallel port IRQ select IRQ5 E12 pins 2 & 3 closed » Factory configured - do not E17 pins 1 & 2 alter 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 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 DRAM CONFIGURATION (CON’T) 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 36 NONE 34MB (1) 4M x 36 (1) 4M x 36 (1) 256K x 36 (1) 256K x 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 64KB Open Open Open 256KB Closed Closed Closed CPU UPGRADE CONFIGURATION Type E11 E13 E14 E15 E16 None Open Open 1 & 2 1 & 2 1 & 2 80846SX Closed Open 1 & 2 1 & 2 1 & 2 80487SX Closed Closed 1 & 2 1 & 2 2 & 3 80486DX/DX2 Closed Closed 2 & 3 1 & 2 2 & 3 Overdrive Closed Closed 2 & 3 1 & 2 2 & 3 (ODPR) Overdrive (ODP) Closed Closed 1 & 2 1 & 2 2 & 3 Overdrive (DX2) Closed Closed 1 & 2 2 & 3 2 & 3 CPU SPEED CONFIGURATION Speed E9 E10 25MHz Closed Closed 33MHz Open Closed 50iMHz Closed Closed 66iMHz Open Closed VIDEO MEMORY CONFIGURATION Size Bank 0 Bank 1 512KB (4) 256KB x 4 NONE 1MB (4) 256KB x 4 (4) 256KB x 4 Note: Bank O is factory installed and is not configurable.