UNIDENTIFIED
TURBO MAINBOARD
| Processor | 8088 | 
| Processor Speed | 4.77/10MHz | 
| Chip Set | None | 
| Max. onboard DRAM | 640KB | 
| SRAM Cache | None | 
| BIOS | Unknown | 
| Dimensions | 330mm x 218mm | 
| I/O Options | None | 
| NPU Options | 8087 | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| Speaker | JP1 | Power LED | JP5/1 & 2 | 
| Keylock | JP3 | Turbo LED | JP5/3 & 4 | 
| Reset switch | JP4 | Turbo Switch | JP6 | 
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper/Switch | Position | |
| » | Factory configured - do not alter | JP7 | N/A | 
| » | Factory configured - do not alter | JP8 | N/A | 
| » | Parity enabled | JP9 | Closed | 
| Parity disabled | JP9 | Open | |
| » | Factory configured - do not alter | SW1/switch 1 | Off | 
| » | NPU enabled | SW1/switch 2 | Off | 
| NPU disabled | SW1/switch 2 | On | |
| » | Factory configured - do not alter | SW1/switch 3 | N/A | 
| » | Factory configured - do not alter | SW1/switch 4 | N/A | 
| DRAM CONFIGURATION | ||||||||
| Size | Bank 0 | Parity 0 | Bank 1 | Parity 1 | Bank 2 | Parity 2 | Bank 3 | Parity 3 | 
| 256KB | (8)41256 | (1)41256 | NONE | NONE | NONE | NONE | NONE | NONE | 
| 256KB | (2)44256 | (1)41256 | NONE | NONE | NONE | NONE | NONE | NONE | 
| 512KB | (8)41256 | (1)41256 | (8)41256 | (1)41256 | NONE | NONE | NONE | NONE | 
| 512KB | (2)44256 | (1)41256 | (2)44256 | (1)41256 | NONE | NONE | NONE | NONE | 
| 576KB | (8)41256 | (1)41256 | (8)41256 | (1)41256 | (8)41256 | (1)41256 | NONE | NONE | 
| 576KB | (2)44256 | (1)41256 | (2)44256 | (1)41256 | (2)44256 | (1)41256 | NONE | NONE | 
| 640KB | (8)41256 | (1)41256 | (8)41256 | (1)41256 | (8)41256 | (1)41256 | (8)41256 | (1)41256 | 
| 640KB | (2)44256 | (1)41256 | (2)44256 | (1)41256 | (2)44256 | (1)41256 | (2)44256 | (1)41256 | 
| Note:When using 44256 or 4464 chips, insert the chips into the dual-size sockets. | ||||||||
| DISPLAY CONFIGURATION | ||
| Type | SW1/switch 5 | SW1/switch 6 | 
| Enhanced graphics adapter | On | On | 
| Color/graphics (40 x 20 mode) | Off | On | 
| Color/graphics (80 x 25 mode) | On | Off | 
| Monochrome display adapter or both | Off | Off | 
| DRIVE CONFIGURATION | ||
| Numper of Installed Drives | SW1/switch 7 | SW1/switch 8 | 
| 1 Drive installed | On | On | 
| 2 Drives installed | Off | On | 
| 3 Drives installed | On | Off | 
| 4 Drives installed | Off | Off |