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# AMERICAN RESEARCH CORPORATION
386S
Processor 80386DX
Processor Speed 16/20MHz
Chip Set Unknown
Max. Onboard 8MB
DRAM
Cache None
BIOS Phoenix
Dimensions 333mm x 305mm
I/O Options 32-bit external memory card slots (2), MIPS
meter connector
NPU Options 80387
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| MIPS meter | CON1 | Speaker | CON5 |
|---------------------+----------+----------------+----------|
| External battery | CON2 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| ยป | Monitor type select color | J9 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | J9 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Slot S1 | Slot S2 |
|---------+--------------+--------------+----------+---------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 | NONE | NONE |
|---------+--------------+--------------+----------+---------|
| 4MB | (4) 256K x 9 | (4) 256K x 9 | 2MB | NONE |
|---------+--------------+--------------+----------+---------|
| 6MB | (4) 256K x 9 | (4) 256K x 9 | 2MB | 2MB |
|---------+--------------+--------------+----------+---------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|---------+--------------+--------------+----------+---------|
| 10MB | (4) 1M x 9 | (4) 1M x 9 | 2MB | NONE |
|---------+--------------+--------------+----------+---------|
| 12MB 1 | (4) 1M x 9 | (4) 1M x 9 | 2MB | 2MB |
|---------+--------------+--------------+----------+---------|
| 12MB 2 | (4) 256K x 9 | (4) 256K x 9 | 8MB | 2MB |
|---------+--------------+--------------+----------+---------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | 8MB | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J3 | J4 | J5 | J6 |
|---------+------------+------------+------------+-----------|
| 2MB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & |
| | closed | closed | closed | 3 closed |
|---------+------------+------------+------------+-----------|
| 4MB | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 2 & |
| | closed | closed | closed | 3 closed |
|---------+------------+------------+------------+-----------|
| 6MB | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | pins 2 & |
| | closed | closed | closed | 3 closed |
|---------+------------+------------+------------+-----------|
| 8MB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 10MB | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 12MB 1 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 12MB 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 2 & |
| | closed | closed | closed | 3 closed |
|---------+------------+------------+------------+-----------|
| 16MB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & |
| | closed | closed | closed | 2 closed |
|------------------------------------------------------------|
| Note 1 :Use this setting when 2MB is installed on board |
| and in slot S1 and S2. |
| |
| Note 2 :Use this setting when 2MB is installed on board |
| and in slot S1, and 8MB is installed in slot S2. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NPU CONFIGURATION |
|------------------------------------------------------------|
| Setting | J1 | J2 |
|--------------------+-------------------+-------------------|
| Disabled | Open | Closed |
|--------------------+-------------------+-------------------|
| Enabled | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS CONFIGURATION |
|------------------------------------------------------------|
| Size | J7 | J8 |
|------------------+--------------------+--------------------|
| 27128 | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 27256 | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 27512 | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+