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# UNIDENTIFIED
386SI4
Processor 80386DX/CX486DLC
Processor Speed 33/40MHz
Chip Set C & T
Max. Onboard DRAM 32MB
SRAM Cache 64/128/256KB
BIOS AMI
Dimensions 254mm x 218mm
I/O Options None
NPU Options 80387/CX83D87/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Turbo LED | J3 | Reset switch | J6 |
|----------------+----------+---------------------+----------|
| Turbo switch | J4 | Power LED & keylock | J7 |
|----------------+----------+---------------------+----------|
| Speaker | J5 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| » | Factory configured - do not alter | JP1 | open |
|---+------------------------------------+--------+----------|
| » | Monitor type select color | JP2 | closed |
|---+------------------------------------+--------+----------|
| | Monitor type select monochrome | JP2 | open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | JP11 |
|--------+---------------+---------------+-------------------|
| 1MB | (4) 256K x 9 | NONE | pins 2 & 3 closed |
|--------+---------------+---------------+-------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 | pins 1 & 2 closed |
|--------+---------------+---------------+-------------------|
| 4MB | (4) 1M x 9 | NONE | pins 2 & 3 closed |
|--------+---------------+---------------+-------------------|
| 5MB | (4) 1M x 9 | (4) 256K x 9 | pins 2 & 3 closed |
|--------+---------------+---------------+-------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | pins 1 & 2 closed |
|--------+---------------+---------------+-------------------|
| 16MB | (4) 4M x 9 | NONE | pins 2 & 3 closed |
|--------+---------------+---------------+-------------------|
| 17MB | (4) 4M x 9 | (4) 256K x 9 | pins 2 & 3 closed |
|--------+---------------+---------------+-------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 | pins 2 & 3 closed |
|--------+---------------+---------------+-------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Jumper | 64KB | 128KB | 256KB |
|--------+-----------------+----------------+----------------|
| SR1 | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR2 | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR4 | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR5 | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR6 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR7 | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR8 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|--------+-----------------+----------------+----------------|
| SR9 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache SRAM | Location | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (8) 8K x 8 | Banks 0 & 1 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | Bank 0 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (8) 32K x 8 | Banks 0 & 1 | (1) 8K x 8 |
+------------------------------------------------------------+