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# ANTEC, INC.
MB5689A
Device Type Mainboard
Processor CX 6X86/IBM 6X86/CX 6X86L/IBM 6X86L/CX
686MX/IBM 6X86MX/
IDT C6/AM K5/AM K6/Pentium/Pentium MMX
Processor Speed 75/90/100/120/133/150/166/200/233/266MHz
Chip Set Intel 430TX
Video Chip Set None
Maximum Onboard 256MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 512KB
BIOS Award
Dimensions 254mm x 218mm
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), IR connector, USB connectors (2),
ATX power connector, wake on LAN connector
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+-----------+-----------------+------------|
| ATX power | ATX | IDE interface | J107/pins |
| connector | | LED | 3 & 4 |
|-----------------+-----------+-----------------+------------|
| Floppy drive | CN1 | Green PC LED | J107/pins |
| interface | | | 5 & 6 |
|-----------------+-----------+-----------------+------------|
| Serial port 1 | CN2 | Green PC | J107/pins |
| | | connector | 7 & 8 |
|-----------------+-----------+-----------------+------------|
| Serial port 2 | CN3 | Soft off power | J107/pins |
| | | supply | 9 & 10 |
|-----------------+-----------+-----------------+------------|
| Parallel port | CN4 | Power LED & | J107/pins |
| | | keylock | 11 – 15 |
|-----------------+-----------+-----------------+------------|
| IDE interface 1 | J6 | Speaker | J107/pins |
| | | | 17 - 20 |
|-----------------+-----------+-----------------+------------|
| IDE interface 2 | J7 | Wake on LAN | J109 |
| | | connector | |
|-----------------+-----------+-----------------+------------|
| USB connector 1 | J10 | IR connector | JP3 |
|-----------------+-----------+-----------------+------------|
| USB connector 2 | J11 | Chassis fan | JP5 |
| | | power | |
|-----------------+-----------+-----------------+------------|
| PS/2 mouse | J99 | EISCA cooling | JP6 |
| interface | | connector | |
|-----------------+-----------+-----------------+------------|
| Reset switch | J107/pins | 32-bit PCI | PC1 – PC4 |
| | 1 & 2 | slots | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| | Flash BIOS voltage select 12v | JP19 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Flash BIOS voltage select 5v | JP19 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP40 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP40 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Any hard drive installed | JP41 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Seagate 5v hard drive installed | JP41 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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 2 | Bank 3 |
|------------------+--------------------+--------------------|
| 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 |
|------------------------------------------------------------|
| Note: Board accepts SDRAM memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 512KB | (1) 64K x 64 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | J101 | J108 |
|-----------+-------------+------------+-------------+-------|
| 120MHz | 50MHz | 2x | 1 & 4, 2 & | 1 & 4 |
| | | | 5, 3 & 6 | |
|-----------+-------------+------------+-------------+-------|
| 150MHz | 60MHz | 2x | 1 & 4 | 1 & 4 |
|-----------+-------------+------------+-------------+-------|
| 166MHz | 66MHz | 2x | Open | 1 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | J101 | J108 |
|-----------+-------------+------------+-------------+-------|
| 120MHz | 50MHz | 2x | 1 & 4, 2 & | 1 & 4 |
| | | | 5, 3 & 6 | |
|-----------+-------------+------------+-------------+-------|
| 150MHz | 60MHz | 2x | 1 & 4 | 1 & 4 |
|-----------+-------------+------------+-------------+-------|
| 166MHz | 66MHz | 2x | Open | 1 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86L) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | J101 | J108 |
|------------+--------------+-------------+---------+--------|
| 166MHz | 66MHz | 2x | Open | 1 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86L) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | J101 | J108 |
|------------+--------------+-------------+---------+--------|
| 166MHz | 66MHz | 2x | Open | 1 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86MX) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | J101 | J108 |
|-----------+-------------+------------+-------+-------------|
| 166MHz | 60MHz | 2.5x | 1 & 4 | 1 & 4, 2 & |
| | | | | 5 |
|-----------+-------------+------------+-------+-------------|
| 200MHz | 66MHz | 2.5x | Open | 1 & 4, 2 & |
| | | | | 5 |
|-----------+-------------+------------+-------+-------------|
| 233MHz | 66MHz | 3x | Open | 2 & 5 |
|-----------+-------------+------------+-------+-------------|
| 266MHz | 66MHz | 3.5x | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86MX) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | J101 | J108 |
|-----------+-------------+------------+------+--------------|
| 200MHz | 66MHz | 2.5x | Open | 1 & 4, 2 & 5 |
|-----------+-------------+------------+------+--------------|
| 233MHz | 66MHz | 3x | Open | 2 & 5 |
|-----------+-------------+------------+------+--------------|
| 266MHz | 66MHz | 3.5x | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IDT C6) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | J101 | J108 |
|-----------+-------------+------------+-------+-------------|
| 150MHz | 60MHz | 2.5x | 1 & 4 | 1 & 4, 2 & |
| | | | | 5 |
|-----------+-------------+------------+-------+-------------|
| 180MHz | 66MHz | 3x | Open | 2 & 5 |
|-----------+-------------+------------+-------+-------------|
| 200MHz | 66MHz | 3x | Open | 2 & 5 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
| CPU speed | Clock | Multiplier | J101 | J108 |
| | speed | | | |
|------------+----------+------------+------------+----------|
| 75MHz | 50MHz | 1.5x | 1 & 4, 2 & | Open |
| | | | 5, 3 & 6 | |
|------------+----------+------------+------------+----------|
| 90MHz | 60MHz | 1.5x | 1 & 4 | Open |
|------------+----------+------------+------------+----------|
| 100MHz | 66MHz | 1.5x | Open | Open |
|------------+----------+------------+------------+----------|
| 120MHz | 60MHz | 1.5x | 1 & 4 | Open |
|------------+----------+------------+------------+----------|
| 133MHz | 66MHz | 1.5x | Open | Open |
|------------+----------+------------+------------+----------|
| 166MHz | 66MHz | 2.5x | Open | 1 & 4, 2 |
| | | | | & 5 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | J101 | J108 |
|-----------+-------------+------------+------+--------------|
| 166MHz | 66MHz | 2.5x | Open | 1 & 4, 2 & 5 |
|-----------+-------------+------------+------+--------------|
| 200MHz | 66MHz | 3x | Open | 2 & 5 |
|-----------+-------------+------------+------+--------------|
| 233MHz | 66MHz | 3.5x | Open | Open |
|-----------+-------------+------------+------+--------------|
| 266MHz | 66MHz | 4x | Open | 1 & 4, 3 & 6 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU speed | Clock | Multiplier | J101 | J108 |
| | speed | | | |
|------------+----------+------------+------------+----------|
| 75MHz | 50MHz | 1.5x | 1 & 4, 2 & | Open |
| | | | 5, 3 & 6 | |
|------------+----------+------------+------------+----------|
| 90MHz | 60MHz | 1.5x | 1 & 4 | Open |
|------------+----------+------------+------------+----------|
| 100MHz | 66MHz | 1.5x | Open | Open |
|------------+----------+------------+------------+----------|
| 120MHz | 60MHz | 2x | 1 & 4 | 1 & 4 |
|------------+----------+------------+------------+----------|
| 133MHz | 66MHz | 2x | Open | 1 & 4 |
|------------+----------+------------+------------+----------|
| 150MHz | 60MHz | 2.5x | 1 & 4 | 1 & 4, 2 |
| | | | | & 5 |
|------------+----------+------------+------------+----------|
| 166MHz | 66MHz | 2.5x | Open | 1 & 4, 2 |
| | | | | & 5 |
|------------+----------+------------+------------+----------|
| 200MHz | 66MHz | 3x | Open | 2 & 5 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
| CPU speed | Clock speed | Multiplier | J101 | J108 |
|-----------+-------------+------------+------+--------------|
| 166MHz | 66MHz | 2.5x | Open | 1 & 4, 2 & 5 |
|-----------+-------------+------------+------+--------------|
| 200MHz | 66MHz | 3x | Open | 2 & 5 |
|-----------+-------------+------------+------+--------------|
| 233MHz | 66MHz | 3.5x | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (SINGLE) |
|------------------------------------------------------------|
| Voltage | J104 |
|---------+--------------------------------------------------|
| Auto | Pins 2 & 3, 5 & 6, 8 & 9, 11 & 12, 14 & 15, 17 & |
| | 18 closed |
|---------+--------------------------------------------------|
| 3.1v | Pins 7 & 8, 13 & 14, 16 & 17 closed |
|---------+--------------------------------------------------|
| 3.33v | Pins 7 & 8, 10 & 11, 16 & 17 closed |
|---------+--------------------------------------------------|
| 3.4v | Pins 7 & 8, 10 & 11, 13 & 14 closed |
|---------+--------------------------------------------------|
| 3.52v | Pins 7 & 8, 10 & 11, 13 & 14, 16 & 17 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (DUAL) |
|------------------------------------------------------------|
| Voltage | V core | J104 |
|----------+---------+---------------------------------------|
| 3.3v | 2.0v | Open |
|----------+---------+---------------------------------------|
| 3.3v | 2.1v | Pins 16 & 17 closed |
|----------+---------+---------------------------------------|
| 3.3v | 2.2v | Pins 13 & 14 closed |
|----------+---------+---------------------------------------|
| 3.3v | 2.3v | Pins 13 & 14, 16 & 17 closed |
|----------+---------+---------------------------------------|
| 3.3v | 2.4v | Pins 10 & 11 closed |
|----------+---------+---------------------------------------|
| 3.3v | 2.5v | Pins 10 & 11, 16 & 17 closed |
|----------+---------+---------------------------------------|
| 3.3v | 2.6v | Pins 10 & 11, 13 & 14 closed |
|----------+---------+---------------------------------------|
| 3.3v | 2.7v | Pins 10 & 11, 13 & 14, 16 & 17 closed |
|----------+---------+---------------------------------------|
| 3.3v | 2.8v | Pins 7 & 8 closed |
|----------+---------+---------------------------------------|
| 3.3v | 2.9v | Pins 7 & 8, 16 & 17 closed |
|----------+---------+---------------------------------------|
| 3.3v | 3.0v | Pins 7 & 8, 13 & 14 closed |
|----------+---------+---------------------------------------|
| 3.3v | 3.2v | Pins 7 & 8, 10 & 11 closed |
+------------------------------------------------------------+