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# LEADING TECHNOLOGY
12/286MX
Processor 80286
Processor Speed 12MHz
Chip Set Unidentified
Max. Onboard DRAM 2MB
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80287 (exact location unidentified)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External Battery | J1 | Speaker | J8 |
|------------------+----------+-------------------+----------|
| Turbo LED | J6 | Power LED & | J9 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Reset switch | J7 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select color | J3 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J3 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Parity check disabled | J4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Parity check enabled | J4 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Turbo enabled | J5 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Turbo disabled | J5 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Wait state select 0 wait state | J10 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Wait state select 1 wait state | J10 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J12 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Reset select power good | J13 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Reset select RC circuit | J13 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | BIOS type select 64K | J14 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | BIOS type select 32K | J14 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J15 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J16 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | NPU speed select 24MHz | J17 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | NPU speed select 12MHz | J17 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|---------+------------+------------+------------+-----------|
| 640KB | (4) 44256 | (4) 4464 | NONE | NONE |
|---------+------------+------------+------------+-----------|
| 1MB | (4) 44256 | (4) 44256 | NONE | NONE |
|---------+------------+------------+------------+-----------|
| 1152KB | (4) 44256 | (4) 4464 | (4) 44256 | NONE |
|---------+------------+------------+------------+-----------|
| 1536KB | (4) 44256 | (4) 44256 | (4) 44256 | NONE |
|---------+------------+------------+------------+-----------|
| 1664KB | (4) 44256 | (4) 4464 | (4) 44256 | (4) 44256 |
|---------+------------+------------+------------+-----------|
| 2MB | (4) 44256 | (4) 44256 | (4) 44256 | (4) 44256 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM PARITY CONFIGURATION |
|------------------------------------------------------------|
| Size | P0 | P1 | P2 | P3 |
|---------+------------+------------+------------+-----------|
| 640KB | (2) 41256 | (2) 4164 | NONE | NONE |
|---------+------------+------------+------------+-----------|
| 1MB | (2) 41256 | (2) 41256 | NONE | NONE |
|---------+------------+------------+------------+-----------|
| 1152KB | (2) 41256 | (2) 4164 | (2) 41256 | NONE |
|---------+------------+------------+------------+-----------|
| 1536KB | (2) 41256 | (2) 41256 | (2) 41256 | NONE |
|---------+------------+------------+------------+-----------|
| 1664KB | (2) 41256 | (2) 4164 | (2) 41256 | (2) 41256 |
|---------+------------+------------+------------+-----------|
| 2MB | (2) 41256 | (2) 41256 | (2) 41256 | (2) 41256 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/1 | SW1/2 | SW1/3 |
|---------------+--------------+--------------+--------------|
| 640KB | On | On | On |
|---------------+--------------+--------------+--------------|
| 1MB | On | Off | Off |
|---------------+--------------+--------------+--------------|
| 1152KB | On | On | Off |
|---------------+--------------+--------------+--------------|
| 1536KB | Off | On | On |
|---------------+--------------+--------------+--------------|
| 1664KB | On | Off | On |
|---------------+--------------+--------------+--------------|
| 2MB | Off | On | Off |
+------------------------------------------------------------+