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# AMERICAN DIGICOM CORPORATION
286H
Processor 80286
Processor Speed 12/16/20MHz
Chip Set Suntac
Max. onboard DRAM 5MB
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options IDE interface, floppy drive interface
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------------+----------+---------------+----------|
| IDE interface | CN1 | Turbo Switch | JP27 |
|----------------------+----------+---------------+----------|
| Floppy drive | CN2 | Turbo LED | JP28 |
| interface | | | |
|----------------------+----------+---------------+----------|
| External battery | JP9 | Speaker | JP29 |
|----------------------+----------+---------------+----------|
| IDE interface LED | JP17 | Power LED & | JP30 |
| | | keylock | |
|----------------------+----------+---------------+----------|
| Reset switch | JP26 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Floppy drive address | JP5 | Closed |
| | select 3F4-3F5h | | |
|---+---------------------------+---------------+------------|
| | Floppy drive address | JP5 | Open |
| | select 374-375h | | |
|---+---------------------------+---------------+------------|
| » | BIOS type select 27256 | JP6 & JP18 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | BIOS type select 27512 | JP6 & JP18 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Floppy drive enabled | JP10 | Closed |
|---+---------------------------+---------------+------------|
| | Floppy drive disabled | JP10 | Open |
|---+---------------------------+---------------+------------|
| » | Floppy drive speed select | JP11 | Closed |
| | 12MHz | | |
|---+---------------------------+---------------+------------|
| | Floppy drive speed select | JP11 | Open |
| | low 16/20MHz | | |
|---+---------------------------+---------------+------------|
| » | NPU speed select low | JP19 & JP20 | pins 1 & 2 |
| | (12MHz CPU) | | closed |
|---+---------------------------+---------------+------------|
| | NPU speed select high | JP19 & JP20 | pins 2 & 3 |
| | (16/20MHz CPU) | | closed |
|---+---------------------------+---------------+------------|
| » | I/O bus speed select | JP25 | Closed |
| | OSC1/4 for 12/16MHz | | |
|---+---------------------------+---------------+------------|
| | I/O bus speed select | JP25 | Open |
| | OSC2/2 for 12/16MHz | | |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | SW1/switch 1 | On |
|---+---------------------------+---------------+------------|
| | Monitor type select | SW1/switch 1 | Off |
| | monochrome | | |
|---+---------------------------+---------------+------------|
| » | Parity enabled | SW1/switch 2 | On |
|---+---------------------------+---------------+------------|
| | Parity disabled | SW1/switch 2 | Off |
|------------------------------------------------------------|
| Note:For a 20Mhz CPU, JP25 should remain open. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Parity | Bank 1 | Parity | Bank 2 | Bank |
| | | 0 | | 1 | | 3 |
|-------+--------+--------+--------+--------+--------+-------|
| 512KB | (4) | (2) | NONE | NONE | NONE | NONE |
| | 44256 | 41256 | | | | |
|-------+--------+--------+--------+--------+--------+-------|
| 512KB | NONE | NONE | NONE | NONE | (2) | NONE |
| | | | | | 256K x | |
| | | | | | 9 | |
|-------+--------+--------+--------+--------+--------+-------|
| 1MB | (4) | (2) | (4) | (2) | NONE | NONE |
| | 44256 | 41256 | 44256 | 41256 | | |
|-------+--------+--------+--------+--------+--------+-------|
| 1MB | NONE | NONE | NONE | NONE | (2) | (2) |
| | | | | | 256K x | 256K |
| | | | | | 9 | x 9 |
|-------+--------+--------+--------+--------+--------+-------|
| 2MB | (4) | (2) | (4) | (2) | (2) | (2) |
| | 44256 | 41256 | 44256 | 41256 | 256K x | 256K |
| | | | | | 9 | x 9 |
|-------+--------+--------+--------+--------+--------+-------|
| 2MB | NONE | NONE | NONE | NONE | (2) 1M | NONE |
| | | | | | x 9 | |
|-------+--------+--------+--------+--------+--------+-------|
| 3MB | (4) | (2) | (4) | (2) | (2) 1M | NONE |
| | 44256 | 41256 | 44256 | 41256 | x 9 | |
|-------+--------+--------+--------+--------+--------+-------|
| 4MB | NONE | NONE | NONE | NONE | (2) 1M | (2) |
| | | | | | x 9 | 1M x |
| | | | | | | 9 |
|-------+--------+--------+--------+--------+--------+-------|
| 5MB | (4) | (2) | (4) | (2) | (2) 1M | (2) |
| | 44256 | 41256 | 44256 | 41256 | x 9 | 1M x |
| | | | | | | 9 |
|------------------------------------------------------------|
| Note:You may use SIPP modules as bank 0 and bank 1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/switch 3 | SW1/switch 4 | SW1/switch 5 |
|------------+---------------+---------------+---------------|
| 512KB | On | On | On |
|------------+---------------+---------------+---------------|
| 1MB | On | On | Off |
|------------+---------------+---------------+---------------|
| 2MB | On | Off | Off |
|------------+---------------+---------------+---------------|
| 2MB | Off | On | On |
|------------+---------------+---------------+---------------|
| 3MB | Off | Off | On |
|------------+---------------+---------------+---------------|
| 4MB | Off | On | Off |
|------------+---------------+---------------+---------------|
| 5MB | On | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MODULE RAM BANK CONFIGURATION |
|------------------------------------------------------------|
| Bank | JP21 | JP22 | JP23 | JP24 |
|----------------+----------+----------+----------+----------|
| SIP RAM as | pins 2 & | pins 2 & | pins 2 & | pins 2 & |
| banks 2 & 3 | 3 | 3 | 3 | 3 |
|----------------+----------+----------+----------+----------|
| SIP RAM as | pins 1 & | pins 1 & | pins 1 & | pins 1 & |
| banks 0 & 1 | 2 | 2 | 2 | 2 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MEMORY MAP CONFIGURATION |
|------------------------------------------------------------|
| Base Memory | Shadow | Extended | SW1/6 | SW1/7 | SW1/8 |
|-------------+--------+-------------+-------+-------+-------|
| 640KB | 0KB | remaining | On | On | On |
| | | memory | | | |
|-------------+--------+-------------+-------+-------+-------|
| 640KB | 128KB | remaining | On | On | Off |
| | | memory | | | |
|-------------+--------+-------------+-------+-------+-------|
| 512KB | 0KB | remaining | On | Off | On |
| | | memory | | | |
|-------------+--------+-------------+-------+-------+-------|
| 512KB | 128KB | remaining | Off | On | On |
| | | memory | | | |
|-------------+--------+-------------+-------+-------+-------|
| 640KB | EMS | 64KB | Off | Off | On |
|-------------+--------+-------------+-------+-------+-------|
| 640KB | EMS | 0KB | Off | On | Off |
|-------------+--------+-------------+-------+-------+-------|
| 512KB | EMS | 64KB | Off | Off | On |
|-------------+--------+-------------+-------+-------+-------|
| 512KB | EMS | 0KB | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IDE INTERFACE CONFIGURATION |
|------------------------------------------------------------|
| Function | JP14 | JP15 |
|------------------+--------------------+--------------------|
| Enabled | pins 2 & 3 | pins 2 & 3 |
|------------------+--------------------+--------------------|
| Disabled | pins 1 & 2 | pins 1 & 2 |
+------------------------------------------------------------+