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# UNIDENTIFIED
MICRO 286-12
Processor 80286
Processor Speed 12MHz
Chip Set Unidentified
Max. Onboard DRAM 4MB
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Speaker | J1 | Turbo LED | J4 |
|-------------------+----------+------------------+----------|
| Reset switch | J2 | External battery | J7 |
|-------------------+----------+------------------+----------|
| Power LED & | J3 | Turbo switch | J8 |
| keylock | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Wait states select 0 | W1 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | Wait state select 1 | W1 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | W2 | pins 2 & 3 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | BIOS type select 27256 | W6 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | BIOS type select 27128 | W6 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | W7 | Closed |
|---+---------------------------+---------------+------------|
| | Monitor type select | W7 | Open |
| | monochrome | | |
|---+---------------------------+---------------+------------|
| » | Parity check enabled | W9 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | Parity check disabled | W9 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Bus speed select fast | SW1/2 | On |
|---+---------------------------+---------------+------------|
| | Bus speed select normal | SW1/2 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-----------+-------------+------------+----------+----------|
| 256KB 1 | (4) 44256 | NONE | NONE | NONE |
|-----------+-------------+------------+----------+----------|
| 256KB | NONE | NONE | (2) 256K | NONE |
| | | | x 9 | |
|-----------+-------------+------------+----------+----------|
| 512KB 2 | (4) 44256 | NONE | NONE | NONE |
|-----------+-------------+------------+----------+----------|
| 512KB | NONE | NONE | (2) 256K | (2) 256K |
| | | | x 9 | x 9 |
|-----------+-------------+------------+----------+----------|
| 512KB | NONE | NONE | (2) 1M x | NONE |
| | | | 9 | |
|-----------+-------------+------------+----------+----------|
| 640KB 3 | (4) 44256 | (4) 4464 | NONE | NONE |
|-----------+-------------+------------+----------+----------|
| 640KB | NONE | NONE | (2) 256K | (2) 256K |
| | | | x 9 | x 9 |
|-----------+-------------+------------+----------+----------|
| 640KB | NONE | NONE | (2) 1M x | NONE |
| | | | 9 | |
|-----------+-------------+------------+----------+----------|
| 1MB 2 | (4) 44256 | (4) 44256 | NONE | NONE |
|-----------+-------------+------------+----------+----------|
| 1MB | NONE | NONE | (2) 256K | (2) 256K |
| | | | x 9 | x 9 |
|-----------+-------------+------------+----------+----------|
| 2MB | NONE | NONE | (2) 1M x | NONE |
| | | | 9 | |
|-----------+-------------+------------+----------+----------|
| 4MB | NONE | NONE | (2) 1M x | (2) 1M x |
| | | | 9 | 9 |
|------------------------------------------------------------|
| Note:If using only SIMMs don't install any chips in P-0 or |
| P-1. |
| |
| Note 1 :If parity checking is enabled, install (2) 41256 |
| in P-0 |
| |
| Note 2 :If parity checking is enabled, install (2) 41256 |
| in P-0 and (2) 41256 in P-1 |
| |
| Note 3 :If parity checking is enabled, install (2) 41256 |
| in P-0 and (2) 4164 in P-0 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/1 | SW1/2 | SW1/3 |
|---------------+--------------+--------------+--------------|
| 256KB 1 | On | On | On |
|---------------+--------------+--------------+--------------|
| 256KB | On | On | On |
|---------------+--------------+--------------+--------------|
| 512KB 2 | On | Off | On |
|---------------+--------------+--------------+--------------|
| 512KB | On | Off | On |
|---------------+--------------+--------------+--------------|
| 512KB | Off | On | On |
|---------------+--------------+--------------+--------------|
| 640KB 3 | On | On | Off |
|---------------+--------------+--------------+--------------|
| 640KB | On | On | Off |
|---------------+--------------+--------------+--------------|
| 640KB | Off | Off | On |
|---------------+--------------+--------------+--------------|
| 1MB 2 | On | Off | Off |
|---------------+--------------+--------------+--------------|
| 1MB | On | Off | Off |
|---------------+--------------+--------------+--------------|
| 2MB | Off | On | Off |
|---------------+--------------+--------------+--------------|
| 4MB | Off | Off | Off |
+------------------------------------------------------------+