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# ADVANCED INTEGRATION RESEARCH, INC.
486MIS REV. 1.11
Processor 80486SX/80487SX/80486DX/80486DX2/ODP486SX/Pentium
Overdrive
Processor 20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set SIS
Max. Onboard 64MB
DRAM
Cache 64/128/256/512KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (2), floppy drive
interface,
IDE interface, parallel port, serial ports (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| 32-bit VESA Local | J1 & J2 | Turbo switch | S6 |
| bus slots | | | |
|---------------------+----------+----------------+----------|
| Turbo LED | S1 | IDE interface | S10 |
|---------------------+----------+----------------+----------|
| Reset switch | S2 | Floppy drive | S11 |
| | | interface | |
|---------------------+----------+----------------+----------|
| Hard drive LED | S3 | Parallel port | S12 |
|---------------------+----------+----------------+----------|
| Speaker | S4 | Serial port 1 | S13 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | S5 | Serial port 2 | S14 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | JP6 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Monitor type select monochrome, | JP16 | Open |
| | VGA or EGA | | |
|---+----------------------------------+--------+------------|
| | Monitor type select CGA | JP16 | Closed |
|---+----------------------------------+--------+------------|
| » | IDE interface enabled | JP17 | Open |
|---+----------------------------------+--------+------------|
| | IDE interface disabled | JP17 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP18 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Parallel port select interrupt | JP22 | pins 1 & 2 |
| | IRQ7 | | closed |
|---+----------------------------------+--------+------------|
| | Parallel port select interrupt | JP22 | pins 2 & 3 |
| | IRQ5 | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP27 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Flash BIOS write protect | JP28 | pins 1 & 2 |
| | disabled | | closed |
|---+----------------------------------+--------+------------|
| | Flash BIOS write protect enabled | JP28 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP31 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Normal password operation | JP32 | Open |
|---+----------------------------------+--------+------------|
| | BIOS password clear | JP32 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|---------+----------------+----------------+----------------|
| 2MB | (1) 512K x 36 | None | None |
|---------+----------------+----------------+----------------|
| 4MB | (1) 512K x 36 | None | (1) 512K x 36 |
|---------+----------------+----------------+----------------|
| 4MB | (1) 1M x 36 | None | None |
|---------+----------------+----------------+----------------|
| 6MB | (1) 512K x 36 | None | (1) 1M x 36 |
|---------+----------------+----------------+----------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None |
|---------+----------------+----------------+----------------|
| 8MB | (1) 2M x 36 | None | None |
|---------+----------------+----------------+----------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|---------+----------------+----------------+----------------|
| 12MB | (1) 2M x 36 | None | (1) 1M x 36 |
|---------+----------------+----------------+----------------|
| 16MB | (1) 2M x 36 | None | (1) 2M x 36 |
|---------+----------------+----------------+----------------|
| 16MB | (1) 4M x 36 | None | None |
|---------+----------------+----------------+----------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | None |
|---------+----------------+----------------+----------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x 36 |
|---------+----------------+----------------+----------------|
| 24MB | (1) 2M x 36 | None | (1) 4M x 36 |
|---------+----------------+----------------+----------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None |
|---------+----------------+----------------+----------------|
| 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 8M x 36 |
|---------+----------------+----------------+----------------|
| 40MB | (1) 2M x 36 | None | (1) 8M x 36 |
|---------+----------------+----------------+----------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 |
|---------+----------------+----------------+----------------|
| 48MB | (1) 8M x 36 | None | (1) 4M x 36 |
|---------+----------------+----------------+----------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 8M x 36 |
|---------+----------------+----------------+----------------|
| 64MB | (1) 8M x 36 | None | (1) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE SIZE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP7 | JP8 | JP9 |JP10 |JP11 |JP12 |JP13 |JP14 |JP15 |
|------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
| 64KB |1 & 2|1 & 2|1 & 2|1 & 2|1 & 2|1 & 2|1 & 2|1 & 2|2 & 3|
|------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
|128KB |1 & 2|1 & 2|2 & 3|2 & 3|2 & 3|1 & 2|1 & 2|1 & 2|1 & 2|
|------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
|256KB |2 & 3|1 & 2|2 & 3|2 & 3|2 & 3|2 & 3|2 & 3|1 & 2|2 & 3|
|------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
|256KB |2 & 3|2 & 3|2 & 3|2 & 3|2 & 3|1 & 2|2 & 3|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE SIZE AND SRAM LOCATIONS |
|------------------------------------------------------------|
| Cache Size | Bank 0 | Bank 1 | TAG | Dirty |
| | | | | Bit |
|------------+--------------+-------------+---------+--------|
| 64KB | (4) 8K x 8 | (4 ) 8K x 8 | (1) 8K | (1) |
| | | | x 8 | 16K x |
| | | | | 1 |
|------------+--------------+-------------+---------+--------|
| 128KB | (4) 32K x 8 | None | (1) 32K | (1) |
| | | | x 8 | 16K x |
| | | | | 1 |
|------------+--------------+-------------+---------+--------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K | (1) |
| | | | x 8 | 16K x |
| | | | | 1 |
|------------+--------------+-------------+---------+--------|
| 512KB | (4) 128K x 8 | None | (1) 32K | (1) |
| | | | x 8 | 16K x |
| | | | | 4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU EXTERNALCLOCK SPEED |
|------------------------------------------------------------|
| Speed | JP3 | JP4 | JP5 |
|---------------+--------------+--------------+--------------|
| 20MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 40MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50i MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 66i MHz | Closed | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE |
|------------------------------------------------------------|
| Type | JP1 | JP2 |
|------------+-------------------+---------------------------|
| 80486SX | Open | pins 2 & 3 closed |
|------------+-------------------+---------------------------|
| 80487SX | pins 2 & 3 closed | pins 1 & 2 and 3 & 4 |
| | | closed |
|------------+-------------------+---------------------------|
| 80486DX | pins 1 & 2 closed | pins 1 & 2 and 3 & 4 |
| | | closed |
|------------+-------------------+---------------------------|
| ODP486SX | pins 2 & 3 closed | pins 1 & 2 and 3 & 4 |
| | | closed |
|------------+-------------------+---------------------------|
| 80486DX2 | pins 1 & 2 closed | pins 1 & 2 and 3 & 4 |
| | | closed |
|------------+-------------------+---------------------------|
| Pentium | pins 1 & 2 closed | pins 1 & 2 and 3 & 4 |
| Overdrive | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IDE RECOVERY TIME |
|------------------------------------------------------------|
| Time | JP29 | JP30 |
|----------------------+------------------+------------------|
| » | 300ns | Closed | Closed |
|---+------------------+------------------+------------------|
| | 240ns | Open | Closed |
|---+------------------+------------------+------------------|
| | 180ns | Closed | Open |
|---+------------------+------------------+------------------|
| | 120ns | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SCSI ADDRESS |
|------------------------------------------------------------|
| Address | W1/pins 3 & 4 | W1/pins 5 & 6 |
|--------------------+-------------------+-------------------|
| DC000h enabled | Closed | Closed |
|--------------------+-------------------+-------------------|
| DC000h disabled | Closed | N/A |
|--------------------+-------------------+-------------------|
| DC8000h enabled | N/A | Closed |
|--------------------+-------------------+-------------------|
| DC8000h disabled | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SCSI PORT CONFIGURATION |
|------------------------------------------------------------|
| Setting | IRQ | W1/1 & 2 | W1/7 & 8 | W1/9 & 10 |
|----------------+------+-----------+-----------+------------|
| » | Enabled | 11 | Closed | Closed | Open |
|---+------------+------+-----------+-----------+------------|
| | Disabled | 10 | Open | Open | Closed |
+------------------------------------------------------------+