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# FREE COMPUTER TECHNOLOGY, INC.
80486PCI REV. 1
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium
Overdrive
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set SIS
Max. Onboard 128MB
DRAM
Cache 128/256/512KB
BIOS Award
Dimensions 330mm x 218mm
I/O Options 32-bit PCI bus slots (4)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+----------+----------------------+-----------|
| Turbo switch | J1 | Speaker | J4 |
|--------------+----------+----------------------+-----------|
| Turbo LED | J2 | Power LED & keylock | J5 |
|--------------+----------+----------------------+-----------|
| Reset switch | J3 | 32-bit PCI bus slots | PC1 - PC4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------+-----------+-------------------|
| » | Cache enabled | JP4 | pins 2 & 3 closed |
|---+------------------------+-----------+-------------------|
| | Cache disabled | JP4 | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 256K x | (1) 256K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 512K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 512K x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 256K x | (1) 256K x | (1) 1M x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 512K x | (1) 512K x | (1) 1M x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 512K x | (1) 512K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 256K x | (1) 256K x | (1) 2M x | (1) 2M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 2M x 36 | (1) 2M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 512K x | (1) 512K x | (1) 2M x | (1) 2M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 2M x 36 | (1) 2M x 36 | (1) 512K x | (1) 512K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 256K x | (1) 256K x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 512K x | (1) 512K x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 512K x | (1) 512K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 2M x 36 | (1) 2M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 66MB | (1) 256K x | (1) 256K x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 66MB | (1) 8M x 36 | (1) 8M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 68MB | (1) 512K x | (1) 512K x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 68MB | (1) 8M x 36 | (1) 8M x 36 | (1) 512K x | (1) 512K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x 36 | (1) 8M x | (1) 8M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 72MB | (1) 8M x 36 | (1) 8M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 80MB | (1) 2M x 36 | (1) 2M x 36 | (1) 8M x | (1) 8M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 8M x 36 | (1) 8M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (1) 128K x 8 | NONE | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP2 | JP3 | JP12 | JP13 |
|-------+-----------------+----------------+--------+--------|
| 128KB | pins 1 & 2 | pins 2 & 3 | Open | Open |
| | closed | closed | | |
|-------+-----------------+----------------+--------+--------|
| 256KB | pins 2 & 3 | pins 1 & 2 | Closed | Open |
| | closed | closed | | |
|-------+-----------------+----------------+--------+--------|
| 512KB | pins 2 & 3 | pins 2 & 3 | Closed | Closed |
| | closed | closed | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP14 | JP15 | JP16 |
|--------------+------------+------------+-------------------|
| 80486SX | pins 1 & 2 | Open | pins 2 & 3 closed |
| | closed | | |
|--------------+------------+------------+-------------------|
| 80487SX | pins 1 & 2 | pins 2 & 3 | pins 1 & 2, 3 & 4 |
| | closed | closed | closed |
|--------------+------------+------------+-------------------|
| ODP486SX | pins 1 & 2 | pins 2 & 3 | pins 1 & 2, 3 & 4 |
| | closed | closed | closed |
|--------------+------------+------------+-------------------|
| 80486DX/DX2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2, 3 & 4 |
| | closed | closed | closed |
|--------------+------------+------------+-------------------|
| Pentium | pins 2 & 3 | pins 2 & 3 | pins 1 & 2, 3 & 4 |
| Overdrive | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP5 | JP10 | JP11 |
|-------------+-------------------+-------------+------------|
| 25MHz | pins 1 & 2 closed | Open | Closed |
|-------------+-------------------+-------------+------------|
| 33MHz | pins 2 & 3 closed | Closed | Open |
|-------------+-------------------+-------------+------------|
| 50iMHz | pins 1 & 2 closed | Open | Closed |
|-------------+-------------------+-------------+------------|
| 66iMHz | pins 2 & 3 closed | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI IRQ14 CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP27 | JP28 |
|-------------------------+--------------------+-------------|
| ISA IDE | pins 2 & 3 closed | Closed |
|-------------------------+--------------------+-------------|
| PCI IDE (edge trigger) | pins 4 & 5 closed | Open |
|-------------------------+--------------------+-------------|
| PCI IDE (level trigger) | pins 1 & 2 closed | Open |
+------------------------------------------------------------+