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# AMERICAN DIGICOM CORPORATION
286E
Processor 80286
Processor Speed 12/16/20MHz
Chip Set Suntac
Max. Onboard DRAM 5MB
Cache None
BIOS AMI
Dimensions 230mm x 220mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Power LED & | JP1 | Turbo LED | JP4 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | JP2 | Turbo switch | JP5 |
|-------------------+----------+------------------+----------|
| Reset switch | JP3 | External battery | JP18 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|-----------------------------------+-----------+------------|
| | NPU speed select CPU CLK/1 | JP7 & JP8 | pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-----------+------------|
| | NPU speed select CPU CLK/3 | JP7 & JP8 | pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-----------+------------|
| » | Monitor type select color | JP9 | Closed |
|---+-------------------------------+-----------+------------|
| | Monitor type select | JP9 | Open |
| | monochrome | | |
|---+-------------------------------+-----------+------------|
| » | Parity check enabled | JP10 | Closed |
|---+-------------------------------+-----------+------------|
| | Parity check disabled | JP10 | Open |
|---+-------------------------------+-----------+------------|
| » | CPU speed select 16/20MHz | JP12 | pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-----------+------------|
| | CPU speed select 12MHz | JP12 | pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-----------+------------|
| » | CMOS memory normal operation | JP17 | pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-----------+------------|
| | CMOS memory clear | JP17 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Parity | Bank 1 | Parity | Bank 2 | Bank |
| | | (P-0) | | (P-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:Banks 2 & 3 are considered Banks 0 & 1, respectively, |
| when filled without using DIP. |
| |
| However, they will be referred to throughout the text as |
| Banks 2 & 3 to avoid confusion. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP13 | JP14 | JP15 | JP16 |
|-------+-------------+------------+------------+------------|
| 512KB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 512KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 1MB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 1MB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 2MB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 2MB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 3MB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 4MB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 5MB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP7 | JP8 |
|------------------+--------------------+--------------------|
| CLK/1 | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| CLK/3 | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+