UNIDENTIFIED
TURBO-640
| Processor | 8088 | 
| Processor Speed | 8MHz | 
| Chip Set | None | 
| Max. Onboard DRAM | 640KB | 
| Cache | None | 
| BIOS | Unidentified | 
| Dimensions | 330mm x 218mm | 
| I/O Options | None | 
| NPU Options | 8087 | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| Reset switch | JP1 | Turbo LED | JP4 | 
| Keylock | JP2 | Speaker | JP5 | 
| Turbo switch | JP3 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Switch | Position | |
| » | Factory configured - do not alter | SW1/1 | Off | 
| » | NPU disabled | SW1/2 | On | 
| NPU enabled | SW1/2 | Off | |
| DRAM CONFIGURATION | ||||
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | 
| 128KB | (9) 41256 | NONE | NONE | NONE | 
| 192KB | (9) 41256 | NONE | NONE | NONE | 
| 256KB | (9) 41256 | NONE | NONE | NONE | 
| 512KB | (9) 41256 | (9) 41256 | NONE | NONE | 
| 576KB | (9) 41256 | (9) 41256 | (9) 4164 | NONE | 
| 640KB | (9) 41256 | (9) 41256 | (9) 4164 | (9) 4164 | 
| DRAM SWITCH CONFIGURATION | ||
| Size | SW1/3 | SW1/4 | 
| 128KB | Off | On | 
| 192KB | On | Off | 
| 256KB | Off | Off | 
| 512KB | Off | Off | 
| 576KB | Off | Off | 
| 640KB | Off | Off | 
| FLOPPY DRIVE CONFIGURATION | ||
| Drives installed | SW1/7 | SW1/8 | 
| 1 | On | On | 
| 2 | Off | On | 
| 3 | On | Off | 
| 4 | Off | Off | 
| MONITOR CONFIGURATION | ||
| Type | SW1/5 | SW1/6 | 
| None installed | On | On | 
| 80 x 25 color | On | Off | 
| Monochrome | Off | Off |