UNIDENTIFIED
TURBO 640
Processor | 8088 |
Processor Speed | 8MHz |
Chip Set | None |
Max. onboard DRAM | 640KB |
Cache | None |
BIOS | Unknown |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 8087 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Turbo switch | JP5 | Power/Turbo LED | JP9 |
Keylock | JP8 | Speaker | P4 |
Note:The exact locations of JP5 and JP8 are unknown. |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper/Switch | Position | |
» | Factory configured - do not alter | JP1 | Unknown |
» | Factory configured - do not alter | SW1/switch 1 | Off |
» | NPU enabled | SW1/switch 2 | Off |
NPU disabled | SW1/switch 2 | On |
DRAM CONFIGURATION | ||||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | JP3 | JP4 |
256KB | (8) 4164 | (8) 4164 | (8) 4164 | (8) 4164 | A & B closed | B closed |
256KB | (8) 41256 | NONE | NONE | NONE | C & D closed | A closed |
512KB | (8) 41256 | (8) 41256 | NONE | NONE | C & D closed | A closed |
640KB | (8) 41256 | (8) 41256 | (8) 4164KB | (8) 4164KB | C & D closed | A closed |
TURBO CONFIGURATION | ||
Mode | JP6 | JP7 |
Software switch | Open | Closed |
Hardware switch | Closed | Open |
DISPLAY CONFIGURATION | ||||
Display Adapter | SW1/5 | SW1/6 | SW1/7 | SW1/8 |
None | On | On | N/A | N/A |
Color/Graphics (40x20) | Off | On | On | On |
Color/Graphics (80x25) | On | Off | On | On |
Monochrome or Both | Off | Off | On | On |
FLOPPY DRIVE CONFIGURATION | ||
Drives Installed | SW1/7 | SW1/8 |
1 | On | On |
2 | Off | On |
3 | On | Off |
4 | Off | Off |