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# MICRO COMPUTER SYSTEMS CORPORATION
V-286
Processor 80286
Processor Speed 12MHz
Chip Set VLSI
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 |
|----------------+----------+---------------------+----------|
| Reset switch | W6 | Speaker | W15 |
|----------------+----------+---------------------+----------|
| Turbo LED | W7 | External battery | W16 |
|----------------+----------+---------------------+----------|
| Turbo switch | W11 | Power LED & keylock | W18 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Zero wait state enabled | SW1/1 | Off |
|---+---------------------------+---------------+------------|
| | Zero wait state disabled | SW1/1 | On |
|---+---------------------------+---------------+------------|
| » | Keyboard controlled speed | SW1/2 | On |
| | switch enabled | | |
|---+---------------------------+---------------+------------|
| | Keyboard controlled speed | SW1/2 | Off |
| | switch disabled | | |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | SW1/3 | Off |
|---+---------------------------+---------------+------------|
| | Monitor type select | SW1/3 | On |
| | monochrome | | |
|---+---------------------------+---------------+------------|
| » | NPU clock speed select | SW1/4 | On |
| | 7.159MHz | | |
|---+---------------------------+---------------+------------|
| | NPU clock speed select | SW1/4 | Off |
| | 14.318MHz | | |
|---+---------------------------+---------------+------------|
| » | Fastmode enabled | SW1/5 | On |
|---+---------------------------+---------------+------------|
| | Fastmode disabled | SW1/5 | Off |
|---+---------------------------+---------------+------------|
| » | ROM wait state select 2 | SW1/6 | On |
| | wait states | | |
|---+---------------------------+---------------+------------|
| | ROM wait state select 1 | SW1/6 | Off |
| | wait state | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/7 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | AT bus speed select 6MHz | SW1/8 | On |
|---+---------------------------+---------------+------------|
| | AT bus speed select 8MHz | SW1/8 | Off |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | W8 | Closed |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | BIOS type select 27256 | W9 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | BIOS type select 27128 | W9 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Battery type select | W12 | pins 1 & 2 |
| | internal | | closed |
|---+---------------------------+---------------+------------|
| | Battery type select | W12 | pins 2 & 3 |
| | external | | closed |
|---+---------------------------+---------------+------------|
| » | Parity enabled | W13 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | Parity disabled | W13 | pins 1 & 2 |
| | | | closed |
|------------------------------------------------------------|
| Note: The locations of W12 & W13 are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Parity | Bank 1 | Parity | Bank 2 | Bank |
| | | 0 | | 1 | | 3 |
|-------+--------+--------+--------+--------+--------+-------|
| 512KB | (16) | (2) | NONE | NONE | NONE | NONE |
| | 41256 | 41256 | | | | |
|-------+--------+--------+--------+--------+--------+-------|
| 640KB | (16) | (2) | (16) | (2) | NONE | NONE |
| | 41256 | 41256 | 4164 | 4164 | | |
|-------+--------+--------+--------+--------+--------+-------|
| 640KB | (16) | (2) | NONE | (2) | (4) | NONE |
| | 41256 | 41256 | | 4164 | 44256 | |
|-------+--------+--------+--------+--------+--------+-------|
| 1MB | (16) | (2) | (16) | (2) | NONE | NONE |
| | 41256 | 41256 | 41256 | 41256 | | |
|-------+--------+--------+--------+--------+--------+-------|
| 1MB | NONE | (2) | NONE | (2) | (4) | (4) |
| | | 41256 | | 41256 | 44256 | 44256 |
|-------+--------+--------+--------+--------+--------+-------|
| 2MB | (16) | (2) | NONE | NONE | NONE | NONE |
| | 411000 | 411000 | | | | |
|-------+--------+--------+--------+--------+--------+-------|
| 4MB | (16) | (2) | (16) | (2) | NONE | NONE |
| | 411000 | 411000 | 411000 | 411000 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W1 | W2 | W3 |
|--------------+---------------+--------------+--------------|
| 512KB | Closed | Closed | Closed |
|--------------+---------------+--------------+--------------|
| 640KB | Closed | Closed | Open |
|--------------+---------------+--------------+--------------|
| 640KB | Closed | Closed | Open |
|--------------+---------------+--------------+--------------|
| 1MB | Open | Closed | Closed |
|--------------+---------------+--------------+--------------|
| 1MB | Open | Closed | Closed |
|--------------+---------------+--------------+--------------|
| 2MB | Open | Closed | Open |
|--------------+---------------+--------------+--------------|
| 4MB | Closed | Open | Closed |
+------------------------------------------------------------+