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# UNIDENTIFIED
TURBO 640
Processor 8088
Processor Speed 8MHz
Chip Set None
Max. onboard DRAM 640KB
Cache None
BIOS Unknown
Dimensions 330mm x 218mm
I/O Options None
NPU Options 8087
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| Turbo switch | JP5 | Power/Turbo LED | JP9 |
|-----------------+----------+--------------------+----------|
| Keylock | JP8 | Speaker | P4 |
|------------------------------------------------------------|
| Note:The exact locations of JP5 and JP8 are unknown. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|---------------------------------+---------------+----------|
| » | Factory configured - do not | JP1 | Unknown |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Factory configured - do not | SW1/switch 1 | Off |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | NPU enabled | SW1/switch 2 | Off |
|---+-----------------------------+---------------+----------|
| | NPU disabled | SW1/switch 2 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank | Bank 2 | Bank 3 | JP3 | JP4 |
| | | 1 | | | | |
|-------+--------+-------+--------+--------+--------+--------|
| 256KB | (8) | (8) | (8) | (8) | A & B | B |
| | 4164 | 4164 | 4164 | 4164 | closed | closed |
|-------+--------+-------+--------+--------+--------+--------|
| 256KB | (8) | NONE | NONE | NONE | C & D | A |
| | 41256 | | | | closed | closed |
|-------+--------+-------+--------+--------+--------+--------|
| 512KB | (8) | (8) | NONE | NONE | C & D | A |
| | 41256 | 41256 | | | closed | closed |
|-------+--------+-------+--------+--------+--------+--------|
| 640KB | (8) | (8) | (8) | (8) | C & D | A |
| | 41256 | 41256 | 4164KB | 4164KB | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TURBO CONFIGURATION |
|------------------------------------------------------------|
| Mode | JP6 | JP7 |
|--------------------+-------------------+-------------------|
| Software switch | Open | Closed |
|--------------------+-------------------+-------------------|
| Hardware switch | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY CONFIGURATION |
|------------------------------------------------------------|
| Display Adapter | SW1/5 | SW1/6 | SW1/7 | SW1/8 |
|------------------------+--------+--------+--------+--------|
| None | On | On | N/A | N/A |
|------------------------+--------+--------+--------+--------|
| Color/Graphics (40x20) | Off | On | On | On |
|------------------------+--------+--------+--------+--------|
| Color/Graphics (80x25) | On | Off | On | On |
|------------------------+--------+--------+--------+--------|
| Monochrome or Both | Off | Off | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE CONFIGURATION |
|------------------------------------------------------------|
| Drives Installed | SW1/7 | SW1/8 |
|--------------------+-------------------+-------------------|
| 1 | On | On |
|--------------------+-------------------+-------------------|
| 2 | Off | On |
|--------------------+-------------------+-------------------|
| 3 | On | Off |
|--------------------+-------------------+-------------------|
| 4 | Off | Off |
+------------------------------------------------------------+