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  |