AST RESEARCH, INC. BRAVO LC (94) (202594-XXX) Processor 80486SX/80486DX/ODP486SX/Pentium Overdrive Processor Speed 25/33MHz Chip Set AST Max. Onboard DRAM 64MB Cache 64/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slot, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port, VGA feature connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse port J12 IDE interface J22 Parallel port J13 Floppy drive J24 interface Serial port 1 J14 Chassis fan power J28 VGA port J18 Front panel LED J29 connector VGA feature connector J19 32-bit VESA Local bus SL1 slot Serial port 2 J20 USER CONFIGURABLE SETTINGS Function Jumper Position » VESA cache write through enabled E1 pins 1 & 2 closed VESA cache write back enabled E1 pins 2 & 3 closed » Parallel port IRQ select IRQ7 E2 pins 1 & 2 closed Parallel port IRQ select IRQ5 E2 pins 2 & 3 closed » On board video enabled E7 Closed On board video disabled E7 Open » Monitor type select color E8 Closed Monitor type select monochrome E8 Open » Factory configured - do not E9 pins 1 & 2 alter closed » CMOS memory normal operation E10 Closed CMOS memory clear E10 Open 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 DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 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 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 E12 E14 64KB Open Open 256KB Closed Closed CPU TYPE CONFIGURATION Type E3 E4 E5 E6 E13 80486SX PQFP 2 & 3 2 & 3 2 & 3 1 & 2 Open 80486SX PGA 1 & 2 1 & 2 1 & 2 1 & 2 Closed 80486DX 2 & 3 2 & 3 2 & 3 1 & 2 Closed ODP80486SX 2 & 3 2 & 3 2 & 3 1 & 2 Closed Pentium 2 & 3 1 & 2 2 & 3 1 & 2 Closed Overdrive Note: Jumper E6 set with pins 1 & 2 closed enables write through cache, pins 2 & 3 closed enabled write back cache. If write back is enabled, and pins 2 & 3 closed on jumper E1, write back mode is enabled for SL1. CPU SPEED CONFIGURATION Speed E15 25MHz Closed 33MHz Open 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 O is factory installed and is not configurable.