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# ELITEGROUP COMPUTER SYSTEMS, INC.
SI56P AVIO
Processor CX M1/Pentium
Processor Speed 75/90/100/120/133/150/166MHz
Chip Set SIS
Video Chip Set None
Maximum Onboard 128MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256/512/1024KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse interface, serial
ports (2), serial port, VGA feature
connector, VGA interface, IR connector, VRM
connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+------------------+-----------|
| PS/2 mouse | J1 | External battery | J15 |
| interface | | | |
|------------------+----------+------------------+-----------|
| VGA feature | J5 | Turbo LED | J16 pins |
| connector | | | 2 & 3 |
|------------------+----------+------------------+-----------|
| VGA interface | J6 | Green PC | J16 pins |
| | | connector | 4 & 5 |
|------------------+----------+------------------+-----------|
| Floppy drive | J8 | Turbo switch | J16 pins |
| interface | | | 6 & 7 |
|------------------+----------+------------------+-----------|
| IDE interface | J9 | Reset switch | J16 pins |
| LED | | | 9 & 10 |
|------------------+----------+------------------+-----------|
| Serial port 2 | J10 | Power LED & | J16 pins |
| | | keylock | 11 - 15 |
|------------------+----------+------------------+-----------|
| Serial port 1 | J11 | Speaker | J16 pins |
| | | | 17 - 20 |
|------------------+----------+------------------+-----------|
| IDE interface 1 | J12 | Chassis fan | J26 |
| | | power | |
|------------------+----------+------------------+-----------|
| Parallel port | J13 | IR connector | JP8 |
| | | (optional) | |
|------------------+----------+------------------+-----------|
| IDE interface 2 | J14 | 32-bit PCI slots | PC1 - PC3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------+-------+----------------|
| » | Super I/O enabled | JP11 | Open |
|---+-------------------------------+-------+----------------|
| | Super I/O disabled | JP11 | Closed |
|---+-------------------------------+-------+----------------|
| » | Flash BIOS voltage select 5v | JP25 | Pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| | Flash BIOS voltage select 12v | JP25 | Pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-------+----------------|
| » | CMOS memory normal operation | JP26 | Open |
|---+-------------------------------+-------+----------------|
| | CMOS memory clear | JP26 | Closed |
|---+-------------------------------+-------+----------------|
| » | On board video enabled | JP27 | Closed |
|---+-------------------------------+-------+----------------|
| | On board video disabled | JP27 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 36 | None |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 36 | None |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------------+---------------+---------------+--------------|
| 256KB (A) | (2) 32K x 32 | None | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 256KB (B) | None | (8) 32K x 8 | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 512KB | None | (8) 64K x 8 | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 1MB | None | (8) 128K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP6 | JP7 |
|------------------+--------------------+--------------------|
| 256KB (A) | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 256KB (B) | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 512KB | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 1MB | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE TYPE CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 |
|------------------+--------------------+--------------------|
| » | Mixed | Pins 2 & 3 closed | Pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | Pure | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CYRIX) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP15 | JP22 | JP24 |
| speed | speed | | | | |
|----------+---------+------------+----------+------+--------|
| 120MHz | 50MHz | 2x | 1 & 2 | Open | Closed |
|----------+---------+------------+----------+------+--------|
| 150MHz | 60MHz | 2x | 3 & 4 | Open | Closed |
|----------+---------+------------+----------+------+--------|
| 166MHz | 66MHz | 2x | 1 & 2, 3 | Open | Closed |
| | | | & 4 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP15 | JP22 | JP24 |
| speed | speed | | | | |
|---------+--------+------------+----------+--------+--------|
| 75MHz | 50MHz | 1.5x | 1 & 2 | Open | Open |
|---------+--------+------------+----------+--------+--------|
| 90MHz | 60MHz | 1.5x | 3 & 4 | Open | Open |
|---------+--------+------------+----------+--------+--------|
| 100MHz | 66MHz | 1.5x | 1 & 2, 3 | Open | Open |
| | | | & 4 | | |
|---------+--------+------------+----------+--------+--------|
| 120MHz | 60MHz | 2x | 3 & 4 | Open | Closed |
|---------+--------+------------+----------+--------+--------|
| 133MHz | 66MHz | 2x | 1 & 2, 3 | Open | Closed |
| | | | & 4 | | |
|---------+--------+------------+----------+--------+--------|
| 150MHz | 60MHz | 2.5x | 3 & 4 | Closed | Closed |
|---------+--------+------------+----------+--------+--------|
| 166MHz | 66MHz | 2.5x | 1 & 2, 3 | Closed | Closed |
| | | | & 4 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP16 |
|----------------------------+-------------------------------|
| 3.3v (STD) | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 3.385v (VR) | Pins 3 & 4 closed |
|----------------------------+-------------------------------|
| 3.525v (VRE) | Pins 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | JP12 | JP13 |
|------------------+--------------------+--------------------|
| » | 1 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|----+-------------+--------------------+--------------------|
| | 3 | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+