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# FREE COMPUTER TECHNOLOGY, INC.
80486EISA (Ver. 2.0)
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set OPTI
Max. Onboard DRAM 128MB
Cache 64/128/256/512KB
BIOS AMI
Dimensions 330mm x 365mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Turbo LED | H1 | Speaker | H4 |
|----------------+----------+---------------------+----------|
| Reset switch | H2 | Power LED & keylock | H5 |
|----------------+----------+---------------------+----------|
| Turbo switch | H3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | JP1 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP2 | pins 2 & 3 |
| | alter | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 64MB | (4) 16M x 9 | NONE |
|------------------+--------------------+--------------------|
| 128MB | (4) 16M x 9 | (4) 16M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG (U26) | TAG (U31) |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 16K x |
| | | | | 1 |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | (1) 16K x |
| | | | | 1 |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 32K x | (1) 16K x |
| | | 8 | 8 | 1 |
|-------+-------------+------------+------------+------------|
| 512KB | (4) 128K x | NONE | (1) 32K x | (1) 64K x |
| | 8 | | 8 | 1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J4 | J5 | J6 | J7 | J8 |
|-------+----------------+--------+--------+--------+--------|
| 64KB | pins 2 & 3 | Open | Open | Open | Open |
| | closed | | | | |
|-------+----------------+--------+--------+--------+--------|
| 128KB | pins 1 & 2 | Closed | Open | Open | Closed |
| | closed | | | | |
|-------+----------------+--------+--------+--------+--------|
| 256KB | pins 2 & 3 | Closed | Closed | Open | Closed |
| | closed | | | | |
|-------+----------------+--------+--------+--------+--------|
| 512KB | pins 1 & 2 | Closed | Closed | Closed | Closed |
| | closed | | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J9 | J10 |
|--------------------+-------------------+-------------------|
| 20MHz | Open | Open |
|--------------------+-------------------+-------------------|
| 25MHz | Open | Open |
|--------------------+-------------------+-------------------|
| 33MHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 40MHz | Closed | Open |
|--------------------+-------------------+-------------------|
| 50iMHz | Open | Open |
|--------------------+-------------------+-------------------|
| 50MHz | Closed | Closed |
|--------------------+-------------------+-------------------|
| 66iMHz | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J11 | J12 |
|----------+-----------------------------+-------------------|
| 80486SX | pins 2 & 3 closed | open |
|----------+-----------------------------+-------------------|
| 80487SX | pins 1 & 2 and 3 & 4 closed | pins 1 & 2 closed |
|----------+-----------------------------+-------------------|
| 80486DX | pins 1 & 2 and 3 & 4 closed | pins 2 & 3 closed |
|----------+-----------------------------+-------------------|
| 80486DX2 | pins 1 & 2 and 3 & 4 closed | pins 2 & 3 closed |
+------------------------------------------------------------+