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# ADVANCED INTEGRATED RESEARCH, INC.
486SH REV. 1.1
Processor 80486SX/80487SX/80486DX/80486DX2/Pentium
Overdrive
Processor 20/25/33/40/50(Internal)/50/66(Internal)MHz
Speed
Chip Set SIS
Max. Onboard 32MB
DRAM
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (3)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| External battery | J1 | Turbo switch | J5 |
|-------------------+----------+------------------+----------|
| Power LED & | J2 | Turbo LED | J6 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J3 | 32-bit VESA | S1, S2, |
| | | Local bus slots | & S3 |
|-------------------+----------+------------------+----------|
| Reset switch | J4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select monochrome, | JP7 | Open |
| | VGA or EGA | | |
|---+----------------------------------+--------+------------|
| | Monitor type select CGA | JP7 | Closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP10 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP10 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|----------------+---------------------+---------------------|
| 1MB | (4) 256K x 9 | NONE |
|----------------+---------------------+---------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|----------------+---------------------+---------------------|
| 4MB | (4) 1M x9 | NONE |
|----------------+---------------------+---------------------|
| 8MB | (4) 1M x9 | (4) 1M x9 |
|----------------+---------------------+---------------------|
| 16MB | (4) 4M x 9 | NONE |
|----------------+---------------------+---------------------|
| 20MB | (4) 1M x9 | (4) 4M x 9 |
|----------------+---------------------+---------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG/U36 |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 | JP3 | JP20 | JP21 |
|-------+------------+----------+----------+--------+--------|
| 64KB | pins 1 & 2 | pins 2 & | pins 1 & | pins 1 | pins 1 |
| | | 3 | 2 | & 2 | & 2 |
|-------+------------+----------+----------+--------+--------|
| 128KB | pins 1 & 2 | pins 1 & | pins 2 & | pins 1 | pins 2 |
| | | 2 | 3 | & 2 | & 3 |
|-------+------------+----------+----------+--------+--------|
| 256KB | pins 2 & 3 | pins 2 & | pins 2 & | pins 2 | pins 2 |
| | | 3 | 3 | & 3 | & 3 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP15 | JP16 | JP18 | JP19 |
|----------------+------------+------------+--------+--------|
| 486SX (PGA) | pins 2 & 3 | Open | Open | Closed |
| | closed | | | |
|----------------+------------+------------+--------+--------|
| 80486SX (PQFP) | pins 2 & 3 | Open | Open | Open |
| | closed | | | |
|----------------+------------+------------+--------+--------|
| 80487SX | pins 1 & 2 | pins 2 & 3 | Closed | Closed |
| | closed | closed | | |
|----------------+------------+------------+--------+--------|
| 80486DX | pins 1 & 2 | pins 1 & 2 | Closed | Closed |
| | closed | closed | | |
|----------------+------------+------------+--------+--------|
| ODP486SX | pins 1 & 2 | pins 2 & 3 | Closed | Closed |
| | closed | closed | | |
|----------------+------------+------------+--------+--------|
| 80486DX2 | pins 1 & 2 | pins 1 & 2 | Closed | Closed |
| | closed | closed | | |
|----------------+------------+------------+--------+--------|
| Pentium | pins 1 & 2 | pins 1 & 2 | Closed | Closed |
| Overdrive | closed | closed | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP5 | JP11 | JP12 | JP14 |
|----------+---------+---------+---------+-------------------|
| 20MHz | Open | Open | Closed | pins 1 & 2 closed |
|----------+---------+---------+---------+-------------------|
| 25MHz | Closed | Closed | Open | pins 1 & 2 closed |
|----------+---------+---------+---------+-------------------|
| 33MHz | Closed | Open | Open | pins 1 & 2 closed |
|----------+---------+---------+---------+-------------------|
| 40MHz | Open | Closed | Open | pins 2 & 3 closed |
|----------+---------+---------+---------+-------------------|
| 50i MHz | Closed | Closed | Open | pins 1 & 2 closed |
|----------+---------+---------+---------+-------------------|
| 50MHz | Open | Open | Open | pins 2 & 3 closed |
|----------+---------+---------+---------+-------------------|
| 66i MHz | Closed | Open | Open | pins 1 & 2 closed |
+------------------------------------------------------------+