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# EPSON, INC.
EQUITY 486DX2/50 PLUS
Processor 80486DX2
Processor 50(internal)Mhz
Speed
Chip Set Epson
Max. Onboard 16MB
DRAM
Cache 32KB
BIOS Epson
Dimensions 355mm x 304mm
I/O Options 32-bit external memory card slot, floppy drive
interface, IDE interface,
parallel port, PS/2 mouse port, serial port, VGA
port
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| PS/2 mouse port | CN1 | Case connector | CN13 |
| | | block | |
|-----------------+----------+--------------------+----------|
| VGA port | CN3 | Floppy drive | CN15 |
| | | interface | |
|-----------------+----------+--------------------+----------|
| Serial port | CN4 | IDE interface LED | CN16 |
|-----------------+----------+--------------------+----------|
| Parallel port | CN5 | 32-bit external | CN19 |
| | | memory card slot | |
|-----------------+----------+--------------------+----------|
| Hard drive LED | CN11 | Chassis fan power | CN21 |
|-----------------+----------+--------------------+----------|
| Speaker | CN12 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Fatory configured - do not alter | JP1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Fatory configured - do not alter | JP2 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Fatory configured - do not alter | JP3 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | On-board VGA adapter enabled | JP4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | On-board VGA adapter disabled | JP4 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Password enabled | JP5 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Password disabled | JP5 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP6 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP6 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Mouse port enabled | JP7 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Mouse port disabled | JP7 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Normal IOCHRDY signal enabled | JP15 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Early IOCHRDY signal enabled | JP15 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
|Size|Bank 0|Bank 1|Bank 2|Bank 3|JP8 |JP9 |JP10 |JP11 |JP12 |
|----+------+------+------+------+----+----+-----+-----+-----|
|4MB |(4) 4M| NONE | NONE | NONE |2 & |2 & |2 & 3|2 & 3|1 & 2|
| | x 9 | | | | 3 | 3 | | | |
|----+------+------+------+------+----+----+-----+-----+-----|
|8MB |(4) 4M|(4) 4M| NONE | NONE |2 & |2 & |2 & 3|1 & 2|1 & 2|
| | x 9 | x 9 | | | 3 | 3 | | | |
|----+------+------+------+------+----+----+-----+-----+-----|
|9MB |(4) 4M|(4) 4M|(4) 1M| NONE |1 & |2 & |2 & 3|1 & 2|1 & 2|
| | x 9 | x 9 | x 9 | | 2 | 3 | | | |
|----+------+------+------+------+----+----+-----+-----+-----|
|10MB|(4) 4M|(4) 4M|(4) 1M|(4) 1M|1 & |1 & |2 & 3|1 & 2|1 & 2|
| | x 9 | x 9 | x 9 | x 9 | 2 | 2 | | | |
|----+------+------+------+------+----+----+-----+-----+-----|
|12MB|(4) 4M|(4) 4M|(4) 4M| NONE |1 & |2 & |1 & 2|1 & 2|1 & 2|
| | x 9 | x 9 | x 9 | | 2 | 3 | | | |
|----+------+------+------+------+----+----+-----+-----+-----|
|16MB|(4) 4M|(4) 4M|(4) 4M|(4) 4M|1 & |1 & |1 & 2|1 & 2|1 & 2|
| | x 9 | x 9 | x 9 | x 9 | 2 | 2 | | | |
|------------------------------------------------------------|
|Note:Pins designated should be in the closed position. |
| |
|Banks 0 - 3 are located on the external memory card. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | JP13 | JP14 |
|------------------+--------------------+--------------------|
| 256KB | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 512KB | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 640KB | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+