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# WYSE TECHNOLOGY, INC.
WYSE DECISION 386SX/20
Processor 80386SX
Processor Speed 16/20MHz
Chip Set WYSE
Max. Onboard DRAM 8MB
Cache None
BIOS WYSE
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Reset switch | J1 | Turbo switch | J4 |
|-------------------+----------+------------------+----------|
| Power LED & | J2 | Turbo LED | J5 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J3 | External battery | J6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CPU speed select 20MHz | JP1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CPU speed select 16MHz | JP1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP5 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP5 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Battery select internal | JP6 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Battery select external | JP6 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Power good signal detect from | JP7 | pins 2 & 3 |
| | power supply | | closed |
|---+----------------------------------+--------+------------|
| | Power good signal detect from | JP7 | pins 1 & 2 |
| | board | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | Bank 4 | Bank |
| | | | | | | 5 |
|-------+--------+--------+--------+--------+--------+-------|
| 1MB 1 | (8) | (4) | NONE | NONE | NONE | NONE |
| | 44256 | 41256 | | | | |
|-------+--------+--------+--------+--------+--------+-------|
| 2MB 1 | (8) | (4) | NONE | NONE | (2) | (2) |
| | 44256 | 41256 | | | 256K x | 256K |
| | | | | | 9 | x 9 |
|-------+--------+--------+--------+--------+--------+-------|
| 3MB 1 | (8) | (4) | NONE | NONE | (2) 1M | NONE |
| | 44256 | 41256 | | | x 9 | |
|-------+--------+--------+--------+--------+--------+-------|
| 4MB | NONE | NONE | (2) 1M | (2) 1M | NONE | NONE |
| | | | x 9 | x 9 | | |
|-------+--------+--------+--------+--------+--------+-------|
| 5MB 1 | (8) | (4) | NONE | NONE | (2) 1M | (2) |
| | 44256 | 41256 | | | x 9 | 1M x |
| | | | | | | 9 |
|-------+--------+--------+--------+--------+--------+-------|
| 5MB | NONE | NONE | (2) | (2) | (2) 1M | (2) |
| | | | 256K x | 256K x | x 9 | 1M x |
| | | | 9 | 9 | | 9 |
|-------+--------+--------+--------+--------+--------+-------|
| 6MB | NONE | NONE | (2) 1M | (2) 1M | (2) 1M | NONE |
| | | | x 9 | x 9 | x 9 | |
|-------+--------+--------+--------+--------+--------+-------|
| 8MB | NONE | NONE | (2) 1M | (2) 1M | (2) 1M | (2) |
| | | | x 9 | x 9 | x 9 | 1M x |
| | | | | | | 9 |
|------------------------------------------------------------|
| Note 1 :Banks 0 and 1 are filled at the factory with DIP |
| chips. |
+------------------------------------------------------------+