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# UNIDENTIFIED
TURBO XT
Processor 8088
Processor Speed 8/10MHz
Chip Set None
Max. Onboard DRAM 640MB
Cache None
BIOS ERSO/DTK
Dimensions 330mm x 218mm
I/O Options None
NPU Options 8087
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+----------+-----------------------+----------|
| Speaker | P4 | Turbo switch | JP7 |
|--------------+----------+-----------------------+----------|
| Turbo switch | JP5 | Keylock | JP8 |
|--------------+----------+-----------------------+----------|
| Turbo switch | JP6 | Power LED & Turbo LED | JP9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|---------------------------------+---------------+----------|
| » | Factory configured - do not | JP1 | N/A |
| | 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 1|Bank |Bank | JP3 | JP3A | JP4 | JP4A |
| | | | 2 | 3 | | | | |
|-----+-------+------+-----+-----+------+------+------+------|
|256KB| (8) | (8) | (8) | (8) | Open |Closed| Open |Closed|
| | 4164 | 4164 |4164 |4164 | | | | |
|-----+-------+------+-----+-----+------+------+------+------|
|256KB| (8) | NONE |NONE |NONE |Closed| Open |Closed| Open |
| | 41256 | | | | | | | |
|-----+-------+------+-----+-----+------+------+------+------|
|512KB| (8) | (8) |NONE |NONE |Closed| Open |Closed| Open |
| | 41256 |41256 | | | | | | |
|-----+-------+------+-----+-----+------+------+------+------|
|640KB| (8) | (8) | (8) | (8) |Closed| Open |Closed| Open |
| | 41256 |41256 |4164 |4164 | | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/switch 3 | SW1/switch 4 |
|------------------+--------------------+--------------------|
| 128KB | Off | On |
|------------------+--------------------+--------------------|
| 192KB | On | Off |
|------------------+--------------------+--------------------|
| 256KB | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR TYPE SELECTION |
|------------------------------------------------------------|
| Type | SW1/switch 5 | SW1/switch 6 |
|--------------------+-------------------+-------------------|
| None | On | On |
|--------------------+-------------------+-------------------|
| Monochrome | Off | Off |
|--------------------+-------------------+-------------------|
| Color 40 x 25 | Off | On |
|--------------------+-------------------+-------------------|
| Color 80 x 25 | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE CONFIGURATION |
|------------------------------------------------------------|
| Number of drives | SW1/switch 7 | SW1/switch 8 |
|--------------------+-------------------+-------------------|
| 1 | On | On |
|--------------------+-------------------+-------------------|
| 2 | Off | On |
|--------------------+-------------------+-------------------|
| 3 | On | Off |
|--------------------+-------------------+-------------------|
| 4 | Off | Off |
+------------------------------------------------------------+