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# EPSON, INC.
EQUITY 386SX/16 PLUS AND EQUITY 320SX PLUS
Processor 80386SX
Processor Speed 16/20MHz
Chip Set VLSI TOPCAT
Max. Onboard 24MB
DRAM
Cache None
BIOS AMI/Epson
Dimensions 3O4mm x 272mm
I/O Options Floppy drive interface, IDE interface,
parallel port, serial port, VGA port
NPU Options 80387SX
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Battery connector | CN1 | IDE interface | CN9 |
|---------------------+----------+----------------+----------|
| Speaker | CN2 | Floppy drive | CN10 |
| | | interface | |
|---------------------+----------+----------------+----------|
| Keyboard/mouse | CN4 | Serial port | CN11 |
| connector | | (COM1) | |
|---------------------+----------+----------------+----------|
| VGA connector | CN5 | HDD access LED | CN12 |
|---------------------+----------+----------------+----------|
| Parallel port | CN6 | Power LED | CN13 |
|---------------------+----------+----------------+----------|
| CPU/Power LED | CN7 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | Password enabled | J2 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Password disabled | J2 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Monitor type select color | J3 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | J3 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Mouse interface enabled | J4 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Mouse interface disabled | J4 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 1 | Bank 2 | Bank 3 |
|------------+---------------+---------------+---------------|
| 3MB | (2) 256K x 9 | (2) 256K x 9 | NONE |
|------------+---------------+---------------+---------------|
| 4MB | (2) 1M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 5MB | (2) 1M x 9 | (2) 256K x 9 | (2) 256K x 9 |
|------------+---------------+---------------+---------------|
| 6MB | (2) 1M x 9 | (2) 1M x 9 | NONE |
|------------+---------------+---------------+---------------|
| 8MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
|------------+---------------+---------------+---------------|
| 10MB | (2) 4M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 11MB | (2) 4M x 9 | (2) 256K x 9 | (2) 256K x 9 |
|------------+---------------+---------------+---------------|
| 12MB | (2) 1M x 9 | (2) 4M x 9 | NONE |
|------------+---------------+---------------+---------------|
| 18MB | (2) 4M x 9 | (2) 4M x 9 | (4) 1M x 9 |
|------------+---------------+---------------+---------------|
| 20MB | (2) 1M x 9 | (2) 4M x 9 | (2) 4M x 9 |
|------------+---------------+---------------+---------------|
| 24MB | (2) 4M x 9 | (2) 4M x 9 | (2) 4M x 9 |
|------------------------------------------------------------|
| Note:Board is supplied with 2MB factory installed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VGA CONFIGURATION |
|------------------------------------------------------------|
| Setting | J1 | J5 |
|------------------+--------------------+--------------------|
| Enabled | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| Disabled | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+