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# ASUS COMPUTER INTERNATIONAL
PCI/I-486SP3
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium
Overdrive
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set Intel
Max. Onboard 128MB
DRAM
Cache 128/256/512KB
BIOS Award
Dimensions 330mm x 218mm
I/O Options 32-bit PCI local bus slots (3), floppy drive
interface, IDE interface, parallel port, SCSI
interface, serial ports (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Power LED & keylock | CON1 | IDE interface | J22 |
| | | LED | |
|---------------------+----------+----------------+----------|
| Speaker | CON2 | 32-bit PCI bus | PCI1 |
| | | slot | |
|---------------------+----------+----------------+----------|
| Turbo LED | CON3 | 32-bit PCI bus | PCI2 |
| | | slot | |
|---------------------+----------+----------------+----------|
| Reset switch | CON4 | 32-bit PCI bus | PCI3 |
| | | slot | |
|---------------------+----------+----------------+----------|
| Turbo switch | CON5 | Serial port 1 | S1 |
|---------------------+----------+----------------+----------|
| Floppy drive | FDD | Serial port 2 | S2 |
| interface | | | |
|---------------------+----------+----------------+----------|
| IDE interface | IDE | Parallel port | S3 |
|---------------------+----------+----------------+----------|
| SCSI interface LED | J7 | SCSI interface | SCSI |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | BIOS ROM select (2) 27512 | J6 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | BIOS ROM select (1) 271000 | J6 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | IDE I/O Channel Ready disabled | J16 | Open |
|---+----------------------------------+--------+------------|
| | IDE I/O Channel Ready enabled | J16 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J23 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J24 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Secondary cache speed 0 wait | J33 | pins 1 & 2 |
| | states | | closed |
|---+----------------------------------+--------+------------|
| | Secondary cache speed 1 wait | J33 | pins 2 & 3 |
| | state | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J34 | pins 2 & 3 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J35 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Secondary cache enabled | J36 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Secondary cache disabled | J36 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J47 | pins 2 & 3 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | BIOS type select EPROM | J48 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | BIOS type select Flash BIOS | J48 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Onboard SCSI interface enabled | J51 | Open |
|---+----------------------------------+--------+------------|
| | Onboard SCSI interface disabled | J51 | Closed |
|---+----------------------------------+--------+------------|
| » | Floppy, IDE, Parallel, and | JSMC | pins 1 & 2 |
| | Serial ports enabled | | closed |
|---+----------------------------------+--------+------------|
| | Floppy, IDE, Parallel, and | JSMC | pins 2 & 3 |
| | Serial ports disabled | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ONBOARD SCSI INTERFACE CONFIGURATION |
|------------------------------------------------------------|
| Onboard SCSI | J17 | J18 |
|-------------------------+-----------------+----------------|
| Present (PCI2 is slave) | Open | Open |
|-------------------------+-----------------+----------------|
| Absent (PCI2 is master) | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT IRQ5 CONFIGURATION |
|------------------------------------------------------------|
| Bus | J3 |
|----------------------------+-------------------------------|
| ISA | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| PCI (INT A) | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT IRQ9 CONFIGURATION |
|------------------------------------------------------------|
| Bus/Device | J1 & J2 |
|----------------------------+-------------------------------|
| ISA | J1/pin 1 & J2/pin 1 closed |
|----------------------------+-------------------------------|
| PCI (INT D) | J1/pin 3 & J2/pin 3 closed |
|----------------------------+-------------------------------|
| SCSI | J1/pin 2 & J2/pin 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT IRQ11 CONFIGURATION |
|------------------------------------------------------------|
| Bus | J4 |
|---------------------------+--------------------------------|
| ISA | pins 1 & 2 closed |
|---------------------------+--------------------------------|
| PCI (INT B) | pins 2 & 3 closed |
|------------------------------------------------------------|
| Note: The PCI bus can have only one IRQ on INT B (i.e. you |
| can use IRQ11 or IRQ14 but not both). |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT IRQ14 CONFIGURATION |
|------------------------------------------------------------|
| Bus | J49 | J50 |
|-------------------+-------------------------+--------------|
| ISA | pins 2 & 3 closed | open |
|-------------------+-------------------------+--------------|
| PCI (INT A) | pins 1 & 2 closed | open |
|-------------------+-------------------------+--------------|
| PCI (INT B) | open | closed |
|------------------------------------------------------------|
| Note: The PCI bus can have only one IRQ on INT B (i.e. you |
| can use IRQ11 or IRQ14 but not both). The PCI bus can have |
| only one IRQ on INT A (i.e. you can use IRQ5 or IRQ14 but |
| not both). The PCI bus can have only one IRQ on INT B |
| (i.e. you can use IRQ11 or IRQ14 but not both). |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT IRQ15 CONFIGURATION |
|------------------------------------------------------------|
| Bus | J5 |
|----------------------------+-------------------------------|
| ISA | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| PCI (INT C) | pins 2 & 3 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) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 128K x 8 | NONE | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J25 | J26 | J37 | J38 |
|-------+-------------+------------+------------+------------|
| 128KB | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 256KB | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 512KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| CPU | Socket | CP1 | CP2 | CP3 | J43 |
|--------------+--------+---------+--------+--------+--------|
| 80486SX | PGA | pins 2 | pins 1 | Open | Closed |
| | | & 3 | & 2 | | |
|--------------+--------+---------+--------+--------+--------|
| 80486SX | PQFP | 1 & 2 | pins 2 | pins 2 | Closed |
| | | and 3 & | & 3 | & 3 | |
| | | 4 | | | |
|--------------+--------+---------+--------+--------+--------|
| 80487SX | PGA | 1 & 2 | pins 2 | pins 2 | Closed |
| | | and 3 & | & 3 | & 3 | |
| | | 4 | | | |
|--------------+--------+---------+--------+--------+--------|
| 80486DX | PGA | 1 & 2 | pins 1 | pins 1 | Closed |
| | | and 3 & | & 2 | & 2 | |
| | | 4 | | | |
|--------------+--------+---------+--------+--------+--------|
| ODP486SX | PGA | 1 & 2 | pins 2 | pins 2 | Closed |
| | | and 3 & | & 3 | & 3 | |
| | | 4 | | | |
|--------------+--------+---------+--------+--------+--------|
| 80486DX2 | PGA | 1 & 2 | pins 1 | pins 1 | Closed |
| | | and 3 & | & 2 | & 2 | |
| | | 4 | | | |
|--------------+--------+---------+--------+--------+--------|
| Pentium | PGA | 1 & 2 | pins 2 | pins 2 | Open |
| Overdrive | | and 3 & | & 3 | & 3 | |
| | | 4 | | | |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | CS1 | J31 | J32 |
|---------+----------------+----------------+----------------|
| 25MHz | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 33MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 50i MHz | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 66i MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | 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 | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 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 | (1) 256K x | (1) 256K x |
| | | 36 | 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 | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x | NONE | NONE |
| | | 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 | (1) 256K x | (1) 256K x |
| | | 36 | 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 | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x | NONE | NONE |
| | | 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 | (1) 256K x | (1) 256K x |
| | | 36 | 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 | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 2M x 36 | (1) 2M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 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 | (1) 256K x | (1) 256K x |
| | | 36 | 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 | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 8M x 36 | (1) 8M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 2M x 36 | (1) 2M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 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 |
+------------------------------------------------------------+