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# FUJIKAMA USA, INC.
80486DX-33/50MHz CONTAQ MAIN BOARD
Processor 80486SX/80487SX/80486DX
Processor Speed 16/20/25/33/50MHz
Chip Set CONTAQ
Max. Onboard DRAM 32MB
Cache 64/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options Auxiliary keyboard connector
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------+--------------+--------------------+------------|
| Keylock | J3 pins 1 & | Turbo switch | J3 pins 15 |
| | 2 | | - 17 |
|-----------+--------------+--------------------+------------|
| Power LED | J3 pins 3 - | Reset switch | J3 pins 19 |
| | 5 | | & 20 |
|-----------+--------------+--------------------+------------|
| Speaker | J3 pins 7 - | Auxiliary keyboard | J4 |
| | 10 | | |
|-----------+--------------+--------------------+------------|
| Turbo LED | J3 pins 12 & | External battery | JP2 |
| | 13 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+---------+-----------|
| ยป | Monitor type select color | JP1 | Closed |
|---+----------------------------------+---------+-----------|
| | Monitor type select monochrome | JP1 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 5MB | (4) 1M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 17MB | (4) 4M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 64KB | (8) 8K x 8 | (1) 8K x 8 |
|------------------+--------------------+--------------------|
| 256KB | (8) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP8 |
|----------+-------------------------------------------------|
| 64KB | pins 1A & 2A, 3A & 4A, 1C & 2C, 3C & 4C closed. |
|----------+-------------------------------------------------|
| 256KB | pins 1B & 2B, 3B & 4B, 1D & 2D, 3D & 4D closed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP7 |
|----------+-------------------------------------------------|
| 80486SX | pins 1B & 2B, 3B & 4B, 1D & 2D, 3D & 4D closed. |
|----------+-------------------------------------------------|
| 80487SX | pins 4A & 4B, 4C & 4D, 2A & 2B, 2C & 2D closed. |
|----------+-------------------------------------------------|
| 80486DX | pins 4A & 4B, 4C & 4D, 1A & 1B, 1C & 1D closed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | Crystal OSC1 | JP3 | JP5 | JP6 | JP9 |
|---------+--------------+--------+---------+--------+-------|
| 16MHz | 32MHz | 2 & 3 | Open | Open | 1 & 2 |
|---------+--------------+--------+---------+--------+-------|
| 20MHz | 40MHz | 1 & 2 | Open | Open | 1 & 2 |
|---------+--------------+--------+---------+--------+-------|
| 25MHz | 25MHz | 1 & 2 | Closed | Open | 2 & 3 |
|---------+--------------+--------+---------+--------+-------|
| 33MHz | 33MHz | 1 & 2 | Open | Closed | 2 & 3 |
|---------+--------------+--------+---------+--------+-------|
| 50MHz | 50MHz | 1 & 2 | Closed | Closed | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+