UNIDENTIFIED
640K SYSTEM BOARD
Processor | 8088 |
Processor Speed | 10MHz |
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 |
Turbo switch | JP1 | Speaker | JP2C |
Turbo LED | JP2A | Reset switch | JP2D |
Power LED & keylock | JP2B |
USER CONFIGURABLE SETTINGS | |||
Function | Switch | Position | |
» | Factory configured - do not alter | SW1/1 | Off |
» | NPU disabled | SW1/2 | On |
NPU enabled | SW1/2 | Off | |
» | Factory configured - do not alter | SW1/3 | Off |
» | Factory configured - do not alter | SW1/4 | Off |
DRAM CONFIGURATION | ||||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 2A | Bank 3 | Bank 3A |
256KB | (9) 41256 | NONE | NONE | NONE | NONE | NONE |
512KB | (9) 41256 | (9) 41256 | NONE | NONE | NONE | NONE |
576KB | (9) 41256 | (9) 41256 | (2) 4464 | (1) 4164 | NONE | NONE |
640KB | (9) 41256 | (9) 41256 | (2) 4464 | (1) 4164 | (2) 4464 | (1) 4164 |
DISPLAY ADAPTER SWITCH CONFIGURATION | ||
Size | SW1/5 | SW1/6 |
None installed | On | On |
Color (40 x 20) | Off | On |
Color (80 x 25) | On | Off |
Monochrome | Off | Off |
FLOPPY DRIVE SWITCH CONFIGURATION | ||
Drives installed | SW1/7 | SW1/8 |
1 | On | On |
2 | Off | On |
3 | On | Off |
4 | Off | Off |