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# TANDON CORPORATION
MODEL 189370/199720
Processor 80286
Processor Speed 6/8/10MHz
Chip Set Unidentified
Maximum Onboard Memory 3MB (2.5MB on external memory card)
Cache None
BIOS Unidentified
Dimensions 355mm x 305mm
I/O Options Serial port, parallel port
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------+----------+-------------------+----------|
| Serial port | CN1 | Parallel port | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|---------------------------------------+-------+------------|
| | Signal select DTR driven | JP1 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Signal select DTR true | JP1 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Signal select DTR false | JP1 | Open |
|---+-----------------------------------+-------+------------|
| | Signal select RTS driven | JP2 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Signal select RTS true | JP2 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Signal select RTS false | JP2 | Open |
|---+-----------------------------------+-------+------------|
| | Signal select DCD driven | JP3 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Signal select DCD true | JP3 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Signal select DCD false | JP3 | Open |
|---+-----------------------------------+-------+------------|
| | Signal select DSR driven | JP4 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Signal select DSR true | JP4 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Signal select DSR false | JP4 | Open |
|---+-----------------------------------+-------+------------|
| | Signal select CTS driven | JP5 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Signal select CTS true | JP5 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Signal select CTS false | JP5 | Open |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP6 | Open |
| | (189370-001, 002) | | |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP6 | Open |
| | (189370-004, 005/199270) | | |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP7 | Open |
| | (189370-001, 002) | | |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP7 | Pins 1 & 2 |
| | (189370-004, 005/199270 | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP8 | Pins 2 & 3 |
| | (189370-001, 002) | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP8 | Pins 1 & 2 |
| | (189370-004, 005/199270) | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP9 | Pins 2 & 3 |
| | (189370-001, 002) | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP9 | Pins 1 & 2 |
| | (189370-004, 005/199270) | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP10 | Pins 1 & 2 |
| | (189370-001, 002) | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP10 | Open |
| | (189370-004, 005/199270) | | |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP11 | Pins 1 & 2 |
| | (189370-001, 002) | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP11 | Pins 1 & 2 |
| | (189370-004, 005/199270) | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP12 | Open |
| | (189370-001, 002) | | |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP12 | Open |
| | (189370-004, 005/199270) | | |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP13 | Pins 1 & 2 |
| | (189370-001, 002) | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP13 | Pins 1 & 2 |
| | (189370-004, 005/199270) | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP14 | Pins 2 & 3 |
| | (189370-001, 002) | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | JP14 | Pins 1 & 2 |
| | (189370-004, 005/199270) | | closed |
|---+-----------------------------------+-------+------------|
| | 0 wait state enabled (model | SW1/1 | On |
| | 199720 only) | | |
|---+-----------------------------------+-------+------------|
| | 0 wait state disabled (model | SW1/1 | Off |
| | 199720 only) | | |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | SW1/2 | N/A |
|---+-----------------------------------+-------+------------|
| » | Video type select 80 characters | SW1/3 | Off |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | SW1/4 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS (CON’T) |
|------------------------------------------------------------|
| Setting | Label | Position |
|----------------------------------------+--------+----------|
| » | Factory configured - do not alter | SW1/5 | N/A |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | SW1/6 | N/A |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | SW1/7 | N/A |
|---+------------------------------------+--------+----------|
| | 512KB - 640KB RAM address enabled | SW1/8 | On |
|---+------------------------------------+--------+----------|
| | 512KB - 640KB RAM address disabled | SW1/8 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM |
|------------------------------------------------------------|
| Note: The orientation and chip sizes are unidentified. |
+------------------------------------------------------------+
IMG IMG 2
+------------------------------------------------------------+
| DRAM |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|--------+------------+------------+------------+------------|
| 512KB | (18) 41256 | None | None | None |
|--------+------------+------------+------------+------------|
| 1MB | (18) 41256 | (18) 41256 | None | None |
|--------+------------+------------+------------+------------|
| 1.5MB | (18) 41256 | (18) 41256 | (18) 41256 | None |
|--------+------------+------------+------------+------------|
| 2MB | (18) 41256 | (18) 41256 | (18) 41256 | (18) 41256 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH |
|------------------------------------------------------------|
|Memory before|Memory after|SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5|
|-------------+------------+------+------+------+------+-----|
| 512-640KB |2560-2688KB | Off | Off | Off | On | Off |
|-------------+------------+------+------+------+------+-----|
| 1024KB | 3072KB | Off | Off | Off | On | On |
|-------------+------------+------+------+------+------+-----|
| 2560-2688KB |4608-4736KB | Off | Off | On | On | Off |
|-------------+------------+------+------+------+------+-----|
| 3072KB | 5120KB | Off | Off | On | On | On |
|-------------+------------+------+------+------+------+-----|
| 4608-4736KB |6656-6784KB | Off | On | Off | On | Off |
|-------------+------------+------+------+------+------+-----|
| 5120KB | 7168KB | Off | On | Off | On | On |
|-------------+------------+------+------+------+------+-----|
| 656-6784KB |8704-8832KB | Off | On | On | On | Off |
|-------------+------------+------+------+------+------+-----|
| 7168KB | 9216KB | Off | On | On | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH (CON’T) |
|------------------------------------------------------------|
|Memory before|Memory after |SW1/1 |SW1/2 |SW1/3 |SW1/4|SW1/5|
|-------------+-------------+------+------+------+-----+-----|
| 8704-8832KB |10752-10880KB| On | Off | Off | On | Off |
|-------------+-------------+------+------+------+-----+-----|
| 9216KB | 11264KB | On | Off | Off | On | On |
|-------------+-------------+------+------+------+-----+-----|
|10752-10880KB|12800-12928KB| On | Off | On | On | Off |
|-------------+-------------+------+------+------+-----+-----|
| 11264KB | 13312KB | On | Off | On | On | On |
|-------------+-------------+------+------+------+-----+-----|
|12800-12928KB|14848-14976KB| On | On | Off | On | Off |
|-------------+-------------+------+------+------+-----+-----|
| 13312KB | 15360KB | On | On | Off | On | On |
|-------------+-------------+------+------+------+-----+-----|
|14848-14976KB| 15744KB | On | On | On | On | Off |
|-------------+-------------+------+------+------+-----+-----|
| 15360KB | 15744KB | On | On | On | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTE |
|------------------------------------------------------------|
| The location of pin 1 is unidentified. |
+------------------------------------------------------------+