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# PC CHIPS MAUNFACTURING, LTD.
M725
Device Type Mainboard
Processor Pentium II
Processor Speed 233/266/300/333MHz
Chip Set Intel
Maximum Onboard 384MB (EDO & SDRAM supported)
Memory
Cache 256/512KB (located on the Pentium II CPU)
BIOS AMI
Dimensions 220mm x 220mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
IDE interfaces (2), parallel port, PS/2 mouse
port, PS/2 mouse interface, serial ports (2),
ATX power connector, AGP slot, audio in –
CD-ROMs (2)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+----------------+--------------|
| AGP slot | AGP | Sound and Game | J3 |
| | | Header | |
|-----------------+----------+----------------+--------------|
| ATX power | ATX | ATX form card | J4 |
| connector | | connector | |
|-----------------+----------+----------------+--------------|
| Audio in – | CD1 | Speaker | J5/pins 1, |
| CD-ROM | | | 3, 5, 7 |
|-----------------+----------+----------------+--------------|
| Audio in – | CD2 | Power LED & | J5/pins 2, |
| CD-ROM | | keylock | 4, 6, 8, 10 |
|-----------------+----------+----------------+--------------|
| Serial port 1 | COM1 | Turbo LED | J5/pins 13 & |
| | | | 14 |
|-----------------+----------+----------------+--------------|
| Serial port 2 | COM2 | IDE interface | J5/pins 15 & |
| | | LED | 16 |
|-----------------+----------+----------------+--------------|
| CPU fan power | FAN1 | Reset switch | J5/pins 17 & |
| | | | 18 |
|-----------------+----------+----------------+--------------|
| Floppy drive | FDC1 | Green PC LED | J5/pins 19 & |
| interface | | | 20 |
|-----------------+----------+----------------+--------------|
| IDE interface 1 | IDE1 | 32-bit PCI | PC1 - PC3 |
| | | slots | |
|-----------------+----------+----------------+--------------|
| IDE interface 2 | IDE2 | Parallel port | PRN1 |
|-----------------+----------+----------------+--------------|
| Digital audio | J1 | PS/2 mouse | PS1 |
| out | | interface | |
|-----------------+----------+----------------+--------------|
| Digital audio | J2 | PS/2 mouse | PS2 |
| in | | port | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| | Sound pro enabled | JP1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Sound pro disabled | JP1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Microphone type select standard | JP2 | Open |
|---+---------------------------------+-------+--------------|
| | Microphone type select special | JP2 | Closed |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP10 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP10 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 8 MB | 1 M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 16 MB | 1 M x 64 | 1 M x 64 | None |
|------------+---------------+---------------+---------------|
| 16 MB | 2 M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 24 MB | 1 M x 64 | 1 M x 64 | 1 M x 64 |
|------------+---------------+---------------+---------------|
| 32 MB | 2 M x 64 | 2 M x 64 | None |
|------------+---------------+---------------+---------------|
| 32 MB | 4 M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 40 MB | 2 M x 64 | 2 M x 64 | 1 M x 64 |
|------------+---------------+---------------+---------------|
| 48 MB | 2 M x 64 | 2 M x 64 | 2 M x 64 |
|------------+---------------+---------------+---------------|
| 64 MB | 4 M x 64 | 4 M x 64 | None |
|------------+---------------+---------------+---------------|
| 64 MB | 8 M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 80 MB | 4 M x 64 | 4 M x 64 | 2 M x 64 |
|------------+---------------+---------------+---------------|
| 96 MB | 4 M x 64 | 4 M x 64 | 4 M x 64 |
|------------+---------------+---------------+---------------|
| 128 MB | 8 M x 64 | 8 M x 64 | None |
|------------+---------------+---------------+---------------|
| 128 MB | 16 M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 130 MB | 8 M x 64 | 8 M x 64 | 4 M x 64 |
|------------+---------------+---------------+---------------|
| 192 MB | 8 M x 64 | 8 M x 64 | 8 M x 64 |
|------------+---------------+---------------+---------------|
| 256 MB | 16 M x 64 | 16 M x 64 | None |
|------------+---------------+---------------+---------------|
| 320 MB | 16 M x 64 | 16 M x 64 | 8 M x 64 |
|------------+---------------+---------------+---------------|
| 384 MB | 16 M x 64 | 16 M x 64 | 16 M x 64 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP5A | JP5B |
|------------------+--------------------+--------------------|
| » | 3.3v | Pins 2 & 3 closed | Pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | 5v | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: The cache is located on the Pentium II CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU FREQUENCY SELECTION |
|------------------------------------------------------------|
| Frequency | JP7 |
|----------------------------+-------------------------------|
| 66MHz | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION |
|------------------------------------------------------------|
| Multiplier | JP3A | JP3B | JP3C | JP3D |
|------------+-----------+-----------+-----------+-----------|
| 1.5x | Open | Open | Closed | Open |
|------------+-----------+-----------+-----------+-----------|
| 2x | Closed | Closed | Closed | Closed |
|------------+-----------+-----------+-----------+-----------|
| 2x | Open | Open | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| 2.5x | Open | Closed | Closed | Closed |
|------------+-----------+-----------+-----------+-----------|
| 3x | Closed | Closed | Open | Closed |
|------------+-----------+-----------+-----------+-----------|
| 3.5x | Open | Closed | Open | Closed |
|------------+-----------+-----------+-----------+-----------|
| 4x | Closed | Closed | Closed | Open |
|------------+-----------+-----------+-----------+-----------|
| 4.5x | Open | Closed | Closed | Open |
|------------+-----------+-----------+-----------+-----------|
| 5x | Closed | Closed | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| 5.5x | Open | Closed | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| 6x | Closed | Open | Closed | Closed |
|------------+-----------+-----------+-----------+-----------|
| 6.5x | Open | Open | Closed | Closed |
|------------+-----------+-----------+-----------+-----------|
| 7x | Closed | Open | Open | Closed |
|------------+-----------+-----------+-----------+-----------|
| 7.5x | Open | Open | Open | Closed |
|------------+-----------+-----------+-----------+-----------|
| 8x | Closed | Open | Closed | Open |
+------------------------------------------------------------+