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# UNIDENTIFIED
TURBO-640
Processor 8088
Processor Speed 8MHz
Chip Set None
Max. Onboard DRAM 640KB
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 | Turbo LED | JP4 |
|--------------------+----------+-----------------+----------|
| Keylock | JP2 | Speaker | JP5 |
|--------------------+----------+-----------------+----------|
| Turbo switch | JP3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Switch | Position |
|---------------------------------------+---------+----------|
| » | Factory configured - do not alter | SW1/1 | Off |
|---+-----------------------------------+---------+----------|
| » | NPU disabled | SW1/2 | On |
|---+-----------------------------------+---------+----------|
| | NPU enabled | SW1/2 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|---------+------------+------------+------------+-----------|
| 128KB | (9) 41256 | NONE | NONE | NONE |
|---------+------------+------------+------------+-----------|
| 192KB | (9) 41256 | NONE | NONE | NONE |
|---------+------------+------------+------------+-----------|
| 256KB | (9) 41256 | NONE | NONE | NONE |
|---------+------------+------------+------------+-----------|
| 512KB | (9) 41256 | (9) 41256 | NONE | NONE |
|---------+------------+------------+------------+-----------|
| 576KB | (9) 41256 | (9) 41256 | (9) 4164 | NONE |
|---------+------------+------------+------------+-----------|
| 640KB | (9) 41256 | (9) 41256 | (9) 4164 | (9) 4164 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/3 | SW1/4 |
|--------------------+-------------------+-------------------|
| 128KB | Off | On |
|--------------------+-------------------+-------------------|
| 192KB | On | Off |
|--------------------+-------------------+-------------------|
| 256KB | Off | Off |
|--------------------+-------------------+-------------------|
| 512KB | Off | Off |
|--------------------+-------------------+-------------------|
| 576KB | Off | Off |
|--------------------+-------------------+-------------------|
| 640KB | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE CONFIGURATION |
|------------------------------------------------------------|
| Drives installed | SW1/7 | SW1/8 |
|--------------------+-------------------+-------------------|
| 1 | On | On |
|--------------------+-------------------+-------------------|
| 2 | Off | On |
|--------------------+-------------------+-------------------|
| 3 | On | Off |
|--------------------+-------------------+-------------------|
| 4 | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR CONFIGURATION |
|------------------------------------------------------------|
| Type | SW1/5 | SW1/6 |
|--------------------+-------------------+-------------------|
| None installed | On | On |
|--------------------+-------------------+-------------------|
| 80 x 25 color | On | Off |
|--------------------+-------------------+-------------------|
| Monochrome | Off | Off |
+------------------------------------------------------------+