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# UNIDENTIFIED
AT286
Processor 80286
Processor Speed 12/16MHz
Chip Set Headland
Max. Onboard DRAM 16MB
Cache None
BIOS AMI/Award/Phoenix
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Reset switch | JP6 | Turbo LED | T1 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J20 | Turbo switch | T2 |
|---------------------+----------+----------------+----------|
| Speaker | SP | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | NPU speed select 10MHz | J21 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | NPU speed select 6MHz | J21 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Wait state select 0 | 0WS | Closed |
|---+---------------------------+---------------+------------|
| | Wait state select 1 | 0WS | Open |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | DSP1/2 | On |
|---+---------------------------+---------------+------------|
| | Monitor type select | DSP1/2 | Off |
| | monochrome | | |
|---+---------------------------+---------------+------------|
| » | BIOS type select 27128 | DSP1/5 | On |
|---+---------------------------+---------------+------------|
| | BIOS type select 27256 | DSP1/5 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------------------------+-------------+-------------|
| 512KB | (18) 41256 | NONE |
|--------------------------------+-------------+-------------|
| 640KB | (18) 41256 | (18) 4164 |
|--------------------------------+-------------+-------------|
| 1MB | (18) 41256 | (18) 41256 |
|--------------------------------+-------------+-------------|
| 640KB + EMS (16KB x 24 pages) | (18) 41256 | (18) 41256 |
|--------------------------------+-------------+-------------|
| 2MB | (18) 411000 | NONE |
|--------------------------------+-------------+-------------|
| 640KB + EMS (16KB x 88 pages) | (18) 411000 | NONE |
|--------------------------------+-------------+-------------|
| 4MB | (18) 411000 | (18) 411000 |
|--------------------------------+-------------+-------------|
| 640KB + EMS (16KB x 216 pages) | (18) 411000 | (18) 411000 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | DSP1/6 | DSP1/7 | DSP1/8 |
|--------------------------------+---------+--------+--------|
| 512KB | On | On | On |
|--------------------------------+---------+--------+--------|
| 640KB | On | On | Off |
|--------------------------------+---------+--------+--------|
| 1MB | On | Off | On |
|--------------------------------+---------+--------+--------|
| 640KB + EMS (16KB x 24 pages) | On | Off | Off |
|--------------------------------+---------+--------+--------|
| 2MB | Off | On | On |
|--------------------------------+---------+--------+--------|
| 640KB + EMS (16KB x 88 pages) | Off | On | Off |
|--------------------------------+---------+--------+--------|
| 4MB | Off | Off | On |
|--------------------------------+---------+--------+--------|
| 640KB + EMS (16KB x 216 pages) | Off | Off | Off |
+------------------------------------------------------------+