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# BCM ADVANCED RESEARCH, INC.
SQ578
Processor CX 6X86/CX 6X86L/CX 686MX/IDT-C6/AM
K5/Pentium
Processor Speed 75/90/100/120/133/150/166/200/233/266/300MHz
Chip Set SIS
Video Chip Set Unidentified
Maximum Onboard 256MB
Memory
Maximum Video Unidentified
Memory
Cache 256/512KB
BIOS Unidentified
Dimensions 270mm x 220mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse interface, serial
ports (2), VGA feature connector, VGA
interface, IR connector, USB connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+---------------+-------------|
| PS/2 mouse | J1 | External | J29 |
| interface | | battery | |
|-------------------+----------+---------------+-------------|
| Serial port 1 | J5 | Chassis fan | J30 |
| | | power | |
|-------------------+----------+---------------+-------------|
| USB connector | J6 | Power LED & | J31/pins 1 |
| | | keylock | - 5 |
|-------------------+----------+---------------+-------------|
| Serial port 2 | J9 | Speaker | J31/pins 7 |
| | | | - 10 |
|-------------------+----------+---------------+-------------|
| Floppy drive | J21 | IDE interface | J31/pins 12 |
| interface | | LED | & 24 |
|-------------------+----------+---------------+-------------|
| Parallel port | J22 | Reset switch | J31/pins 21 |
| | | | & 22 |
|-------------------+----------+---------------+-------------|
| VGA feature | J25 | Green PC | J32 |
| connector | | connector | |
|-------------------+----------+---------------+-------------|
| IDE interface 2 | J26 | Green PC LED | J33 |
|-------------------+----------+---------------+-------------|
| VGA interface | J27 | IR connector | J34 |
|-------------------+----------+---------------+-------------|
| IDE interface 1 | J28 | 32-bit PCI | PC1 – PC4 |
| | | slots | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| » | CMOS memory normal operation | JP1 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | CMOS memory clear | JP1 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Cyrix linear bust mode select | JP18 | Open |
| | interleave burst | | |
|---+-----------------------------------+-------+------------|
| | Cyrix linear bust mode select | JP18 | Closed |
| | linear burst | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM 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 |
|------------------+--------------------+--------------------|
| 128MB | (2) 16M x 36 | None |
|------------------+--------------------+--------------------|
| 136MB | (2) 16M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 144MB | (2) 16M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 160MB | (2) 16M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 192MB | (2) 16M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 256MB | (2) 16M x 36 | (2) 16M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 1M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 24MB | (1) 2M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 64 | None |
|------------------+--------------------+--------------------|
| 32MB | (1) 2M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 40MB | (1) 4M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 48MB | (1) 4M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 64 | None |
|------------------+--------------------+--------------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 72MB | (1) 8M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 80MB | (1) 8M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 96MB | (1) 8M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 128MB | (1) 16M x 64 | None |
|------------------+--------------------+--------------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 |
|------------------+--------------------+--------------------|
| 136MB | (1) 16M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 144MB | (1) 16M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 160MB | (1) 16M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 192MB | (1) 16M x 64 | (1) 8M x 64 |
|------------------+--------------------+--------------------|
| 256MB | (1) 16M x 64 | (1) 16M x 64 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP2 |
|----------------------------+-------------------------------|
| 3.3v | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 5v | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 256KB | (2) 32K x 32 |
|----------------------------+-------------------------------|
| 512KB | (2) 64K x 32 |
+------------------------------------------------------------+
+-------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86/6X86L) |
|-------------------------------------------------------------|
| CPU |Clock|Multiplier| JP4 | JP5 | JP6 | JP7 |JP8 |JP9 |
|speed |speed| | | | | | | |
|------+-----+----------+------+------+------+------+----+----|
|120MHz|50MHz| 2x |Closed|Closed| Open |Closed|Open|Open|
|------+-----+----------+------+------+------+------+----+----|
|133MHz|55MHz| 2x | Open | Open | Open |Closed|Open|Open|
|------+-----+----------+------+------+------+------+----+----|
|150MHz|60MHz| 2x | Open |Closed| Open |Closed|Open|Open|
|------+-----+----------+------+------+------+------+----+----|
|166MHz|66MHz| 2x |Closed| Open | Open |Closed|Open|Open|
|------+-----+----------+------+------+------+------+----+----|
|200MHz|75MHz| 2x |Closed|Closed|Closed|Closed|Open|Open|
+-------------------------------------------------------------+
+---------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86MX) |
|---------------------------------------------------------------|
| CPU |Clock|Multiplier| JP4 | JP5 | JP6 | JP7 | JP8 |JP9 |
|speed |speed| | | | | | | |
|------+-----+----------+------+------+------+------+------+----|
|133MHz|50MHz| 2x |Closed|Closed| Open |Closed| Open |Open|
|------+-----+----------+------+------+------+------+------+----|
|133MHz|55MHz| 2x | Open | Open | Open |Closed| Open |Open|
|------+-----+----------+------+------+------+------+------+----|
|150MHz|60MHz| 2x | Open |Closed| Open |Closed| Open |Open|
|------+-----+----------+------+------+------+------+------+----|
|150MHz|50MHz| 2.5x |Closed|Closed| Open |Closed|Closed|Open|
|------+-----+----------+------+------+------+------+------+----|
|166MHz|66MHz| 2x |Closed| Open | Open |Closed| Open |Open|
|------+-----+----------+------+------+------+------+------+----|
|166MHz|75MHz| 2.5x | Open | Open | Open |Closed|Closed|Open|
|------+-----+----------+------+------+------+------+------+----|
|166MHz|50MHz| 3x |Closed|Closed| Open | Open |Closed|Open|
|------+-----+----------+------+------+------+------+------+----|
|166MHz|60MHz| 2.5x | Open |Closed| Open |Closed|Closed|Open|
|------+-----+----------+------+------+------+------+------+----|
|200MHz|75MHz| 2x |Closed|Closed|Closed|Closed| Open |Open|
|------+-----+----------+------+------+------+------+------+----|
|200MHz|75MHz| 3x | Open | Open | Open | Open |Closed|Open|
|------+-----+----------+------+------+------+------+------+----|
|200MHz|55MHz| 2.5x |Closed| Open | Open |Closed|Closed|Open|
|------+-----+----------+------+------+------+------+------+----|
|200MHz|60MHz| 3x | Open |Closed| Open | Open |Closed|Open|
|------+-----+----------+------+------+------+------+------+----|
|233MHz|75MHz| 2.5x |Closed|Closed|Closed|Closed|Closed|Open|
|------+-----+----------+------+------+------+------+------+----|
|233MHz|66MHz| 3x |Closed| Open | Open | Open |Closed|Open|
|------+-----+----------+------+------+------+------+------+----|
|266MHz|66MHz| 3.5x |Closed| Open | Open | Open | Open |Open|
|------+-----+----------+------+------+------+------+------+----|
|266MHz|75MHz| 3x |Closed|Closed|Closed| Open |Closed|Open|
+---------------------------------------------------------------+
+---------------------------------------------------------------+
| CPU SPEED SELECTION (AMD) |
|---------------------------------------------------------------|
| CPU |Clock|Multiplier| JP4 | JP5 |JP6 | JP7 | JP8 | JP9 |
|speed |speed| | | | | | | |
|------+-----+----------+------+------+----+------+------+------|
|75MHz |50MHz| 1.5x |Closed|Closed|Open| Open | Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|90MHz |60MHz| 1.5x | Open |Closed|Open| Open | Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|100MHz|66MHz| 1.5x |Closed| Open |Open| Open | Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|120MHz|60MHz| 2x | Open |Closed|Open|Closed| Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|133MHz|66MHz| 2x |Closed| Open |Open|Closed| Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|150MHz|60MHz| 2.5x | Open |Closed|Open|Closed|Closed| Open |
|------+-----+----------+------+------+----+------+------+------|
|166MHz|66MHz| 2.5x |Closed| Open |Open|Closed|Closed| Open |
|------+-----+----------+------+------+----+------+------+------|
|200MHz|66MHz| 3x |Closed| Open |Open| Open |Closed| Open |
|------+-----+----------+------+------+----+------+------+------|
|233MHz|66MHz| 3.5x |Closed| Open |Open| Open | Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|266MHz|66MHz| 4x |Closed| Open |Open|Closed| Open |Closed|
|------+-----+----------+------+------+----+------+------+------|
|300MHz|66MHz| 4.5x |Closed| Open |Open|Closed|Closed|Closed|
+---------------------------------------------------------------+
+---------------------------------------------------------------+
| CPU SPEED SELECTION (IDT-C6) |
|---------------------------------------------------------------|
| CPU |Clock|Multiplier| JP4 | JP5 | JP6 | JP7 | JP8 |JP9 |
|speed |speed| | | | | | | |
|------+-----+----------+------+------+------+------+------+----|
|150MHz|50MHz| 3x |Closed|Closed| Open | Open |Closed|Open|
|------+-----+----------+------+------+------+------+------+----|
|150MHz|75MHz| 2x |Closed|Closed|Closed|Closed| Open |Open|
|------+-----+----------+------+------+------+------+------+----|
|180MHz|60MHz| 3x | Open |Closed| Open | Open |Closed|Open|
|------+-----+----------+------+------+------+------+------+----|
|200MHz|66MHz| 3x |Closed| Open | Open | Open |Closed|Open|
+---------------------------------------------------------------+
+---------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|---------------------------------------------------------------|
| CPU |Clock|Multiplier| JP4 | JP5 |JP6 | JP7 | JP8 | JP9 |
|speed |speed| | | | | | | |
|------+-----+----------+------+------+----+------+------+------|
|75MHz |50MHz| 1.5x |Closed|Closed|Open| Open | Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|90MHz |60MHz| 1.5x | Open |Closed|Open| Open | Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|100MHz|66MHz| 1.5x |Closed| Open |Open| Open | Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|120MHz|60MHz| 2x | Open |Closed|Open|Closed| Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|133MHz|66MHz| 2x |Closed| Open |Open|Closed| Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|150MHz|60MHz| 2.5x | Open |Closed|Open|Closed|Closed| Open |
|------+-----+----------+------+------+----+------+------+------|
|166MHz|66MHz| 2.5x |Closed| Open |Open|Closed|Closed| Open |
|------+-----+----------+------+------+----+------+------+------|
|200MHz|66MHz| 3x |Closed| Open |Open| Open |Closed| Open |
|------+-----+----------+------+------+----+------+------+------|
|233MHz|66MHz| 3.5x |Closed| Open |Open| Open | Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|266MHz|66MHz| 4x |Closed| Open |Open|Closed| Open |Closed|
|------+-----+----------+------+------+----+------+------+------|
|300MHz|66MHz| 4.5x |Closed| Open |Open|Closed|Closed|Closed|
+---------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (SINGLE) |
|------------------------------------------------------------|
|Voltage | JP10 | JP11 | JP12 | JP13 | JP14 | JP15 | JP16 |
|--------+------+------+------+-------+-------+-------+------|
| 3.38v | Open | Open | Open |Closed | Open | 1 & 2 |1 & 2 |
|--------+------+------+------+-------+-------+-------+------|
| 3.52v | Open | Open | Open | Open |Closed | 1 & 2 |1 & 2 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (DUAL) |
|------------------------------------------------------------|
|Voltage|V core| JP10 | JP11 | JP12 |JP13 |JP14 | JP15 |JP16 |
|-------+------+------+------+------+-----+-----+------+-----|
| 3.3v | 2.1 | Open | Open | Open |Open |Open |2 & 3 |2 & 3|
|-------+------+------+------+------+-----+-----+------+-----|
| 3.3v | 2.8 |Closed| Open | Open |Open |Open |2 & 3 |2 & 3|
|-------+------+------+------+------+-----+-----+------+-----|
| 3.3v | 2.9 | Open |Closed| Open |Open |Open |2 & 3 |2 & 3|
|-------+------+------+------+------+-----+-----+------+-----|
| 3.3v | 3.2 | Open | Open |Closed|Open |Open |2 & 3 |2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ON BOARD VGA SELECTION |
|------------------------------------------------------------|
| Setting | JP3 | JP17 |
|------------------+-------------------------+---------------|
| Enabled | Pins 2 & 3 closed | Open |
|------------------+-------------------------+---------------|
| Disabled | Pins 1 & 2 closed | Closed |
|------------------------------------------------------------|
| Note: these jumpers are optional and may not be present. |
+------------------------------------------------------------+