UNIDENTIFIED
TURBO MAIN BOARD
Processor | 8088 |
Processor Speed | 8MHz |
Chip Set | Unidentified |
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 | P6 pins 1 & 2 |
Turbo LED | P3 | Reset switch | P6 pins |
Speaker | P4 | Keylock | P6 pins |
Turbo switch | P5 | Turbo LED | P7 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper/Switch | Position | |
» | Turbo enabled | P5 | pins 1 & 2 closed |
Turbo disabled | P5 | pins 3 & 4 closed | |
» | Turbo enabled | SW2/1 | Off |
Turbo disabled | SW2/1 | On | |
» | NPU disabled | SW2/2 | On |
NPU enabled | SW2/2 | Off |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
64KB | (9) 4164 | NONE | NONE | NONE |
128KB | (9) 4164 | (9) 4164 | NONE | NONE |
192KB | (9) 4164 | (9) 4164 | (9) 4164 | NONE |
256KB | (9) 4164 | (9) 4164 | (9) 4164 | (9) 4164 |
256KB | (9) 41256 | NONE | NONE | NONE |
640KB | (9) 41256 | (9) 41256 | (9) 4164 | (9) 4164 |
DRAM SWITCH CONFIGURATION | ||
Size | SW2/3 | SW2/4 |
64KB | On | On |
128KB | Off | On |
192KB | Off | On |
256KB | Off | Off |
640KB | Off | Off |
DRAM SWITCH CONFIGURATION | |
Size | JP2 |
Bank 0 & 1 = 41256 | Closed |
Bank 2 & 3 = 4164 | Closed |
DRAM SWITCH CONFIGURATION | |
Size | JP2 |
Bank 0 & 1 = 4164 | Open |
Bank 2 & 3 = 4164 | Open |
MONITOR CONFIGURATION | ||
Type | SW2/5 | SW2/6 |
Monochrome | Off | Off |
40 x 25 color | Off | On |
80 x 25 color | On | Off |
FLOPPY DRIVE CONFIGURATION | ||
Type | SW2/7 | SW2/8 |
1 | On | On |
2 | Off | On |
3 | On | Off |
4 | Off | Off |