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# SINGA
386X SYSTEM BOARD
Processor 80386DX
Processor Speed 16/20MHz
Chip Set C & T
Max. Onboard DRAM 8MB
Cache None
BIOS CEI
Dimensions 330mm x 219mm
I/O Options 32-bit external memory card slot
NPU Options 80287/80387/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------------+----------+--------------+----------|
| 32-bit external | J15 | Reset switch | JP7 |
| memory card | | | |
|-----------------------+----------+--------------+----------|
| Speaker | J19 | Turbo switch | JP9 |
|-----------------------+----------+--------------+----------|
| Power LED & keylock | J20 | Turbo LED | JP10 |
|-----------------------+----------+--------------+----------|
| External battery | J21 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select color | JP1 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP1 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP2 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP3 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Battery type select internal | JP6 | Closed |
|---+----------------------------------+--------+------------|
| | Battery type select external | JP6 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP8 | pins 1 & 2 |
| | alter | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NPU JUMPER CONFIGURATION |
|------------------------------------------------------------|
| NPU Type | JP4 | JP5 |
|--------------------+-------------------+-------------------|
| 80287 | Open | Closed |
|--------------------+-------------------+-------------------|
| 80387 | Closed | Open |
|--------------------+-------------------+-------------------|
| 3167 | Open | Open |
|--------------------+-------------------+-------------------|
| disabled | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION FOR THE 386-MEM CARD |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (4) 256K x | NONE | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (4) 256K x | (4) 256K x | NONE | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
+------------------------------------------------------------+
IMG IMG 2