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. | |