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# INTEL CORPORATION
CLASSIC/PCI EXPANDABLE DESKTOP
(I486 PROCESSOR/PCI)
Processor 80486SX/SL80486SX/80486SX2/SL80486DX/80486DX2/SL80486DX2/
80486DX4/Pentium Overdrive
Processor 25/33/50(internal)/66(internal)/100(internal)MHz
Speed
Chip Set Intel
Max. 64MB
Onboard
DRAM
Cache 128/256KB
BIOS AMI
Dimensions 254mm x 218mm
I/O Parallel port, serial ports (2), 32-bit PCI slots (3),
Options floppy drive interface, IDE interface
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+------------------+-----------|
| Serial port 1 | CN1 | IDE interface | JP1 pins |
| | | LED | 10 - 13 |
|------------------+----------+------------------+-----------|
| Serial port 2 | CN2 | Turbo LED | JP1 pins |
| | | | 16 - 17 |
|------------------+----------+------------------+-----------|
| IDE interface | CN3 | Chassis fan | JP2 pins |
| | | power | 6 - 8 |
|------------------+----------+------------------+-----------|
| Parallel port | CN4 | Speaker | JP2 pins |
| | | | 10 - 14 |
|------------------+----------+------------------+-----------|
| Floppy drive | CN5 | Turbo switch | JP2 pins |
| interface | | | 16 - 17 |
|------------------+----------+------------------+-----------|
| Reset switch | JP1 pins | 32-bit PCI slots | PC1 - PC3 |
| | 1 & 2 | | |
|------------------+----------+------------------+-----------|
| Power LED & | JP1 pins | | |
| keylock | 4 - 8 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | J1C1 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Pentium Overdrive cache disabled | J1C2 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Pentium Overdrive cache enabled | J1C2 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | CPU type select SL-enhanced CPU | J1C3 | pins 1 & 2 |
| | installed | | closed |
|---+----------------------------------+--------+------------|
| | CPU type select non SL-enhanced | J1C3 | pins 2 & 3 |
| | CPU installed | | closed |
|---+----------------------------------+--------+------------|
| » | CPU type select non 80486SX CPU | J1C4 | pins 1 & 2 |
| | installed | | closed |
|---+----------------------------------+--------+------------|
| | CPU type select 80486SX CPU | J1C4 | pins 2 & 3 |
| | installed | | closed |
|---+----------------------------------+--------+------------|
| » | Password normal operation | J9D1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Password clear | J9D1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J9D2 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | J9E1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J9E1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Setup access enabled | J9E2 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Setup access disabled | J9E2 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Flash BIOS write protect enabled | J9E3 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Flash BIOS write protect | J9E3 | pins 2 & 3 |
| | disabled | | closed |
|---+----------------------------------+--------+------------|
| » | Normal boot enabled | J9E4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Recovery boot enabled | J9E4 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | NONE | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 1MB | (1) 256K x 36 | NONE |
|------------------+--------------------+--------------------|
| 2MB | NONE | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 2MB | (1) 256K x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 2MB | (1) 512K x 36 | NONE |
|------------------+--------------------+--------------------|
| 3MB | (1) 256K x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 3MB | (1) 512K x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 4MB | NONE | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 4MB | (1) 512K x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 4MB | (1) 1M x 36 | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 5MB | (1) 256K x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 5MB | (1) 1M x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 6MB | (1) 512K x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 6MB | (1) 1M x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 8MB | (1) 2M x 36 | NONE |
|------------------+--------------------+--------------------|
| 9MB | (1) 256K x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 9MB | (1) 2M x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 10MB | (1) 512K x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 10MB | (1) 2M x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 12MB | (1) 1M x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 16MB | NONE | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (1) 4M x 36 | NONE |
|------------------+--------------------+--------------------|
| 17MB | (1) 256K x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 17MB | (1) 4M x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 18MB | (1) 512K x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 18MB | (1) 4M x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (1) 2M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (1) 4M x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 32MB | NONE | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (1) 8M x 36 | NONE |
|------------------+--------------------+--------------------|
| 33MB | (1) 256K x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 33MB | (1) 8M x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 34MB | (1) 512K x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 34MB | (1) 8M x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 36MB | (1) 8M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (1) 2M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (1) 8M x 36 | (1) 2M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (1) 4M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (1) 8M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG | U1 |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 32K x | (1) 16K x |
| | | | 8 | 1 |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 32K x | (1) 16K x |
| | | 8 | 8 | 1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J8A1 | J8A2 |
|------------------+--------------------+--------------------|
| 128KB | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 256KB | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J1E1 | J1E2 |
|------------------+--------------------+--------------------|
| 25MHz | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 33MHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 50iMHz | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 66iMHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 100iMHz | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | J2A1 | J2A2 | J2A3 | J2A4 |
|---------+------------+------------+------------+-----------|
| 3.3v | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 5v | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & |
| | closed | closed | closed | 3 closed |
+------------------------------------------------------------+