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# UNIDENTIFIED
8MHZ SYSTEM BOARD
Processor 8088
Processor Speed 4.77/8MHz
Chip Set Unidentified
Video Chip Set None
Maximum Onboard Memory 640KB
Maximum Video Memory None
Cache None
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options None
NPU Options 8087
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Reset switch | JP1 | Speaker | JP4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+--------+-----------|
| ยป | Factory configured - do not alter | SW1/1 | Off |
|---+-----------------------------------+--------+-----------|
| | NPU not installed | SW1/2 | On |
|---+-----------------------------------+--------+-----------|
| | NPU installed | SW1/2 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Note: The location of the banks are unidentified. The |
| number and type of memory chips is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/3 | SW1/4 |
|--------------------+-------------------+-------------------|
| 128KB | Off | On |
|--------------------+-------------------+-------------------|
| 192KB | On | Off |
|--------------------+-------------------+-------------------|
| 256KB | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP3 |
|-------------------------------+----------------------------|
| 4164 chips installed | Pins 2 & 3 closed |
|-------------------------------+----------------------------|
| 41256 & 4164 chips installed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP2 |
|-------------------------------+----------------------------|
| 4.77MHz | Closed |
|-------------------------------+----------------------------|
| 8MHz | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE SELECTION |
|------------------------------------------------------------|
| Drives installed | SW1/7 | SW1/8 |
|--------------------+-------------------+-------------------|
| 1 | On | On |
|--------------------+-------------------+-------------------|
| 2 | Off | On |
|--------------------+-------------------+-------------------|
| 3 | On | Off |
|--------------------+-------------------+-------------------|
| 4 | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR SELECTION |
|------------------------------------------------------------|
| Multiplier | SW1/5 | SW1/6 |
|--------------------+-------------------+-------------------|
| None | On | On |
|--------------------+-------------------+-------------------|
| Color (40 x 20) | Off | On |
|--------------------+-------------------+-------------------|
| Color (80 x 25) | On | Off |
|--------------------+-------------------+-------------------|
| Monochrome | Off | Off |
+------------------------------------------------------------+