UNIDENTIFIED
8MHz SYSTEM BOARD
Processor | 8088 |
Processor Speed | 4.77/8MHz |
Chip Set | Unknown |
Max. Onboard DRAM | 640KB |
Cache | None |
BIOS | ATI |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 8087 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Speaker | CN1 | Reset switch | JP1 |
USER CONFIGURABLE SETTINGS | |||
Function | Switch | Position | |
» | Factory configured - do not alter | SW1/1 | Off |
» | NPU enabled | SW1/2 | On |
NPU disabled | SW1/2 | Off |
DRAM CONFIGURATION | |||||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | JP3 | SW1/3 | SW1/4 |
256KB | (9) 4164 | (9) 4164 | (9) 4164 | (9) 4164 | pins 1 & 2 | On | Off |
640KB | (9) 41256 | (9) 41256 | (9) 41256 | (9) 41256 | pins 2 & 3 | Off | On |
Note:Pins designated should be in the closed position. The exact locations of Banks 0 through 4 is unknown. |
MONITOR TYPE CONFIGURATION | ||
Type | SW1/5 | SW1/6 |
No display adapter | On | On |
Color (40 x 20 mode) | Off | On |
Color (80 x 25 mode) | On | Off |
Monochrome or both | Off | Off |
FLOPPY DRIVES INSTALLED | ||
Drive(s) Installed | SW1/switch 7 | SW1/switch 8 |
1 | On | On |
2 | Off | On |
3 | On | Off |
4 | Off | Off |
CPU SPEED CONFIGURATION | |
Speed | JP2 |
4.77MHz | pins 2 & 3 closed |
8MHz | Open |
Note:The system runs at 8MHz when the power is switched on but can be changed to 4mhz by pressing <CTRL> <ALT> <-> and closing pins 1 & 2. To return back to high speed, press the three keys once again. |