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# FREE COMPUTER TECHNOLOGY, INC.
486F39X, 486VL VIII
Processor CX486S/80486SX/80486SX2/CX486DX/80486DX/CX486DX2/80486DX2/
80486DX4/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set OPTI
Max. 64MB
Onboard
DRAM
Cache 128/256/512KB
BIOS Award
Dimensions 330mm x 218mm
I/O 32-bit VESA local bus slots (3), green PC connector
Options
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Turbo switch | J1 | Break switch | J6 |
|---------------+----------+----------------------+----------|
| Turbo LED | J2 | External battery | J7 |
|---------------+----------+----------------------+----------|
| Reset switch | J3 | Green PC connector | JP2 |
|---------------+----------+----------------------+----------|
| Power LED & | J4 | Green PC connector | JP3 |
| keylock | | | |
|---------------+----------+----------------------+----------|
| Speaker | J5 | 32-bit VESA Local | SL1 - |
| | | bus slots | SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------+--------+----------------|
| » | CMOS memory normal operation | JP4 | pins 2 & 3 |
| | | | closed |
|---+------------------------------+--------+----------------|
| | CMOS memory clear | JP4 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (GROUP 1) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 256Kx 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 2MB | (4) 256K x 9 | (1) 256K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 4MB | (4) 256K x 9 | (1) 256K x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 4MB | (4) 1M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 5MB | (4) 256K x 9 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 6MB | (4) 256K x 9 | (1) 256K x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 8MB | (4) 1M x 9 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 10MB | (4) 256K x 9 | (1) 256K x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 12MB | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (4) 4M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 16MB | (4) 1M x 9 | (1) 1M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 17MB | (4) 256K x 9 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 18MB | (4) 256K x 9 | (1) 256K x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 20MB | (4) 1M x 9 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 24MB | (4) 1M x 9 | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (4) 4M x 9 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 36MB | (4) 1M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 40MB | (4) 1M x 9 | (1) 1M x 36 | (1) 8M x 36 |
|------------+---------------+---------------+---------------|
| 48MB | (4) 4M x 9 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (4) 4M x 9 | (1) 4M x 36 | (1) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (GROUP 2) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|-------------+--------------+---------------+---------------|
| 1MB | NONE | (1) 256K x 36 | NONE |
|-------------+--------------+---------------+---------------|
| 2MB | NONE | (1) 256K x 36 | (1) 256K x 36 |
|-------------+--------------+---------------+---------------|
| 4MB | NONE | (1) 1M x 36 | NONE |
|-------------+--------------+---------------+---------------|
| 5MB | NONE | (1) 256K x 36 | (1) 1M x 36 |
|-------------+--------------+---------------+---------------|
| 8MB | NONE | (1) 1M x 36 | (1) 1M x 36 |
|-------------+--------------+---------------+---------------|
| 16MB | NONE | (1) 4M x 36 | NONE |
|-------------+--------------+---------------+---------------|
| 17MB | NONE | (1) 256K x 36 | (1) 4M x 36 |
|-------------+--------------+---------------+---------------|
| 20MB | NONE | (1) 1M x 36 | (1) 4M x 36 |
|-------------+--------------+---------------+---------------|
| 32MB | NONE | (1) 4M x 36 | (1) 4M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (GROUP 3) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|-------------+--------------+---------------+---------------|
| 2MB | NONE | (1) 512K x 36 | NONE |
|-------------+--------------+---------------+---------------|
| 4MB | NONE | (1) 512K x 36 | (1) 512K x 36 |
|-------------+--------------+---------------+---------------|
| 6MB | NONE | (1) 512K x 36 | (1) 1M x 36 |
|-------------+--------------+---------------+---------------|
| 8MB | NONE | (1) 2M x 36 | NONE |
|-------------+--------------+---------------+---------------|
| 10MB | NONE | (1) 512K x 36 | (1) 2M x 36 |
|-------------+--------------+---------------+---------------|
| 12MB | NONE | (1) 2M x 36 | (1) 1M x 36 |
|-------------+--------------+---------------+---------------|
| 16MB | NONE | (1) 2M x 36 | (1) 2M x 36 |
|-------------+--------------+---------------+---------------|
| 18MB | NONE | (1) 512K x 36 | (1) 4M x 36 |
|-------------+--------------+---------------+---------------|
| 24MB | NONE | (1) 2M x 36 | (1) 4M x 36 |
|-------------+--------------+---------------+---------------|
| 32MB | NONE | (1) 8M x 36 | NONE |
|-------------+--------------+---------------+---------------|
| 40MB | NONE | (1) 2M x 36 | (1) 8M x 36 |
|-------------+--------------+---------------+---------------|
| 48MB | NONE | (1) 8M x 36 | (1) 4M x 36 |
|-------------+--------------+---------------+---------------|
| 64MB | NONE | (1) 8M x 36 | (1) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Group | JP31 |
|----------------------------+-------------------------------|
| Group 1 | pins 2 & 3, 4 & 5 closed |
|----------------------------+-------------------------------|
| Group 2 | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| Group 3 | pins 1 & 2, 4 & 5 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------+--------------+-------------+-----------------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|-------+--------------+-------------+-----------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 16K x 8 or (1) |
| | | | 32K x 8 |
|-------+--------------+-------------+-----------------------|
| 256KB | (4) 64K x 8 | NONE | (1) 16K x 8 or (1) |
| | | | 32K x 8 |
|-------+--------------+-------------+-----------------------|
| 512KB | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|-------+--------------+-------------+-----------------------|
| 512KB | (4) 128K x 8 | NONE | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP12 | JP21 |
|----------------+--------------------------+----------------|
| 128KB | pins 1 & 2 closed | Open |
|----------------+--------------------------+----------------|
| 256KB | pins 2 & 3 closed | Open |
|----------------+--------------------------+----------------|
| 256KB | pins 1 & 2, 3 & 4 closed | Open |
|----------------+--------------------------+----------------|
| 512KB | pins 2 & 3, 4 & 5 closed | Closed |
|----------------+--------------------------+----------------|
| 512KB | pins 1 & 2, 3 & 4 closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP6 | JP7 |
|-------------------+--------------+-------------------------|
| CX486S | 1 & 2, 3 & 4 | 2 & 3, 4 & 5, 7 & 8, 9 |
| | | & 10 |
|-------------------+--------------+-------------------------|
| 80486SX/SX2 | 2 & 3, 4 & 5 | 1 & 2, 3 & 4, 6 & 7, 8 |
| | | & 9 |
|-------------------+--------------+-------------------------|
| CX486DX | 1 & 2, 3 & 4 | 2 & 3, 4 & 5, 7 & 8, 9 |
| | | & 10 |
|-------------------+--------------+-------------------------|
| CX486DX2 | 1 & 2, 3 & 4 | 2 & 3, 4 & 5, 7 & 8, 9 |
| | | & 10 |
|-------------------+--------------+-------------------------|
| 80486DX/DX2 | 2 & 3, 4 & 5 | 1 & 2, 3 & 4, 6 & 7, 8 |
| | | & 9 |
|-------------------+--------------+-------------------------|
| 80486DX4 (2x) | 2 & 3, 4 & 5 | 1 & 2, 3 & 4, 6 & 7, 8 |
| | | & 9 |
|-------------------+--------------+-------------------------|
| 80486DX4 (2.5x) | 2 & 3, 4 & 5 | 1 & 2, 3 & 4, 6 & 7, 8 |
| | | & 9 |
|-------------------+--------------+-------------------------|
| 80486DX4 (3x) | 2 & 3, 4 & 5 | 1 & 2, 3 & 4, 6 & 7, 8 |
| | | & 9 |
|-------------------+--------------+-------------------------|
| Overdrive | 2 & 3, 4 & 5 | 1 & 2, 3 & 4, 6 & 7, 8 |
| | | & 9 |
|-------------------+--------------+-------------------------|
| Pentium Overdrive | 1 & 2, 4 & 5 | 1 & 2, 3 & 4, 6 & 7, 8 |
| | | & 9 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP11 | JP14 | JP15 |
|------------------+-------+------------------+--------------|
| CX486S | Open | 2 & 3, 5 & 6 | 3 & 4 |
|------------------+-------+------------------+--------------|
| 80486SX/SX2 | Open | 2 & 3, 4 & 5, 6 | 3 & 4 |
| | | & 7 | |
|------------------+-------+------------------+--------------|
| CX486DX | Open | 3 & 4 | 1 & 2, 5 & 6 |
|------------------+-------+------------------+--------------|
| CX486DX2 | Open | 1 & 2, 5 & 6 | 1 & 2, 3 & 4 |
|------------------+-------+------------------+--------------|
| 80486DX/DX2 | Open | 1 & 2, 4 & 5, 6 | 3 & 4 |
| | | & 7 | |
|------------------+-------+------------------+--------------|
| 80486DX4 (2x) | 2 & 3 | 1 & 2, 4 & 5, 6 | 3 & 4 |
| | | & 7 | |
|------------------+-------+------------------+--------------|
| 80486DX4 (2.5x) | 1 & 2 | 1 & 2, 4 & 5, 6 | 3 & 4 |
| | | & 7 | |
|------------------+-------+------------------+--------------|
| 80486DX4 (3x) | Open | 1 & 2, 4 & 5, 6 | 3 & 4 |
| | | & 7 | |
|------------------+-------+------------------+--------------|
| Overdrive | Open | 1 & 2, 4 & 5, 6 | 3 & 4 |
| | | & 7 | |
|------------------+-------+------------------+--------------|
| Pentium | Open | 1 & 2, 4 & 5, 6 | 4 & 5 |
| Overdrive | | & 7 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP17 | JP19 | JP20 |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 40MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP24 |
|-------------------------------+----------------------------|
| <=33MHz | Open |
|-------------------------------+----------------------------|
| >33MHz | Closed |
+------------------------------------------------------------+