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# FREE COMPUTER TECHNOLOGY, INC.
80486SWB-ISA
Processor 80486SX/80486DX
Processor Speed 20/25/33MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
Cache 256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 4167
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Turbo LED | JP11 | External battery | J11 |
|-------------------+----------+------------------+----------|
| Power LED & | J20 | Reset switch | SW1 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J21 | Turbo switch | SW2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+---------+-----------|
| ยป | Monitor type select color | JP2 | Open |
|---+----------------------------------+---------+-----------|
| | Monitor type select monochrome | JP2 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+------------+------------+-------------+-------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+------------+------------+-------------+-------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+------------+------------+-------------+-------------|
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | NONE |
|------+------------+------------+-------------+-------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 |
|------+------------+------------+-------------+-------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 | NONE | NONE |
|------+------------+------------+-------------+-------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 | NONE | NONE |
|------+------------+------------+-------------+-------------|
| 24MB | (4) 1M x 9 | (4) 4M x 9 | (1) 1M x 36 | NONE |
|------+------------+------------+-------------+-------------|
| 24MB | (4) 4M x 9 | (4) 1M x 9 | (1) 1M x 36 | NONE |
|------+------------+------------+-------------+-------------|
| 28MB | (4) 1M x 9 | (4) 4M x 9 | (1) 1M x 36 | (1) 1M x 36 |
|------+------------+------------+-------------+-------------|
| 28MB | (4) 4M x 9 | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 |
|------+------------+------------+-------------+-------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | JP9 | JP10 | JP12 |
|---------+----------------+----------------+----------------|
| 64KB | Open | Open | Open |
|---------+----------------+----------------+----------------|
| 256KB | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP3 | JP4 | JP5 |
|----------+-------------------+---------+-------------------|
| 80486SX | Open | Open | pins 2 & 3 closed |
|----------+-------------------+---------+-------------------|
| 80487SX | pins 1 & 2 closed | Closed | pins 1 & 2 closed |
|----------+-------------------+---------+-------------------|
| 80486DX | pins 2 & 3 closed | Closed | pins 1 & 2 closed |
+------------------------------------------------------------+