UNIDENTIFIED
C & T TURBO MAINBOARD
| Processor | 80286 | 
| Processor Speed | 12 MHz | 
| Chip Set | C & T | 
| Max. Onboard DRAM | 4MB | 
| Cache | None | 
| BIOS | AMI/C & T | 
| Dimensions | 260mm x 220mm | 
| I/O Options | None | 
| NPU Options | 80287 | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| External battery | BAT | Turbo LED | JP1 | 
| Power LED & keylock | J1 | Reset switch | JP2 | 
| Speaker | J2 | Turbo switch | JP3 | 
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | NPU synchronous with CPU | JP4 | pins 1 & 2 closed | 
| NPU asynchronous with CPU | JP4 | pins 2 & 3 closed | |
| » | Monitor type select color | JP6 | pins 2 & 3 closed | 
| Monitor type select monochrome | JP6 | pins 1 & 2 closed | |
| » | Power good signal detect from power supply | JP7 | pins 2 & 3 closed | 
| Power good signal detect from board | JP7 | pins 1 & 2 closed | |
| DRAM CONFIGURATION (DIP) | ||
| Size | Bank 0 | Bank 1 | 
| 512KB | (4) 44256 | NONE | 
| 640KB | (4) 44256 | (4) 4464 | 
| 1MB | (4) 44256 | (4) 44256 | 
| DRAM PARITY CONFIGURATION (DIP) | ||
| Size | P0 | P1 | 
| 512KB | (2) 41256 | NONE | 
| 640KB | (2) 41256 | (2) 4164 | 
| 1MB | (2) 41256 | (2) 41256 | 
| DRAM CONFIGURATION (SIP) | ||
| Size | Bank 0 | Bank 1 | 
| 512KB | (2) 256K x 9 | NONE | 
| 1MB | (2) 256K x 9 | (2) 256K x 9 | 
| 2MB | (2) 1M x 9 | NONE | 
| 4MB | (2) 1M x 9 | (2) 1M x 9 |