AST RESEARCH, INC.
BRAVO 286/386SX SYSTEM BOARD (202382-001, 002, 005)
Processor | 80386SX |
Processor Speed | 20MHz |
Chip Set | AST |
Max. Onboard DRAM | 16MB |
Cache | None |
BIOS | AST |
Dimensions | 355mm x 251mm |
I/O Options | 16-bit external CPU/NPU card slot, bus mouse port, floppy interface, IDE interface, parallel port, serial ports (2), VGA port |
NPU Options | 80387SX |

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Bus mouse port | J12 | Floppy drive interface | J24 |
Parallel port | J13 | External battery | J26 |
Primary serial port | J14 | Speaker | J27 |
VGA port | J18 | Fan connector | J28 |
VGA pass-thru | J19 | Front panel switch/display | J29 |
Secondary serial port header | J20 | 16-bit external CPU/NPU card | J34 |
IDE interface | J22 | Drive active LED connector | J35 |
USER CONFIGURABLE SETTINGS | |||
Function | Switch | Position | |
| » | VGA interface enabled | SW1/1 | On |
VGA interface disabled | SW1/1 | Off | |
| » | Password check normal operation | SW1/2 | Off |
Password clear | SW1/2 | On | |
| » | Factory configured - do not alter | SW1/3 | Off |
| » | Factory configured - do not alter | SW1/4 | Off |
| » | Factory configured - do not alter | SW1/5 | On |
| » | Factory configured - do not alter | SW1/6 | On |
| » | PS/2 mode enabled (AT mode disabled) | SW1/7 | On |
PS/2 mode disabled (AT mode enabled) | SW1/7 | Off | |
| » | Monitor type select fixed frequency | SW1/8 | Off |
Monitor type select multi-frequency | SW1/8 | On | |
| » | Factory configured - do not alter | SW1/9 | Off |
| » | Factory configured - do not alter | SW1/10 | Off |
DRAM CONFIGURATION | |||
Size | Bank 0 | Bank 1 | Bank 2 |
1MB | (2) 256K x 9 | (2) 256K x 9 | NONE |
1.5MB | (2) 256K x 9 | (2) 256K x 9 | (2) 256K x 9 |
2MB | (2) 1M x 9 | NONE | NONE |
3MB | (2) 256K x 9 | (2) 256K x 9 | (2) 1M x 9 |
4MB | (2) 1M x 9 | (2) 1M x 9 | NONE |
4.5MB | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x 9 |
6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
8MB | (2) 4M x 9 | NONE | NONE |
9MB | (2) 256K x 9 | (2) 256K x 9 | (2) 4M x 9 |
12MB | (2) 1M x 9 | (2) 1M x 9 | (2) 4M x 9 |
16MB | (2) 4M x 9 | (2) 4M x 9 | NONE |