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# DATAEXPERT CORPORATION
GCT-MGX
Device Type Mainboard
Processor CX GX
Processor Speed 120/133/150/166/180/200MHz
Chip Set CX 5510
Video Chip Set Cyrix integrated
Audio Chip Set Cyrix integrated
Maximum Onboard 128MB
Memory
Cache None
BIOS Unidentified
Dimensions 254mm x 218mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
game interface, green PC connector, IDE
interfaces (2), parallel port, PS/2 mouse
interface, serial ports (2), IR connector,
ATX power connector, audio in – CD-ROMs (2)
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+----------------+-------------|
| ATX power | ATX | IR connector | IR1 |
| connector | | | |
|------------------+----------+----------------+-------------|
| Serial port 2 | CN1 | Speaker | JP7/pins |
| | | | 1/3/5/7 |
|------------------+----------+----------------+-------------|
| Serial port 1 | CN2 | Power LED & | JP7/pins |
| | | keylock | 2/4/6/8/10 |
|------------------+----------+----------------+-------------|
| IDE interface 1 | CN3 | Reset switch | JP7/pins 13 |
| | | | & 14 |
|------------------+----------+----------------+-------------|
| IDE interface 2 | CN4 | IDE interface | JP7/pins 15 |
| | | LED | & 16 |
|------------------+----------+----------------+-------------|
| Floppy drive | CN5 | Green PC | JP7/pins 17 |
| interface | | connector | & 18 |
|------------------+----------+----------------+-------------|
| Parallel port | CN6 | Green PC LED | JP7/pins 19 |
| | | | & 20 |
|------------------+----------+----------------+-------------|
| CPU fan power | FAN | MIDI board | JP9 |
| | | connector | |
|------------------+----------+----------------+-------------|
| Game interface | J5 | Soft off power | JP11 |
| | | supply | |
|------------------+----------+----------------+-------------|
| Audio in – | J6 | PS/2 mouse | JP14 |
| CD-ROM | | interface | |
|------------------+----------+----------------+-------------|
| Audio in – | J7 | 32-bit PCI | PC1 – PC3 |
| CD-ROM | | slots | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------+-------+-----------------|
| » | CMOS memory normal operation | JP13 | Pins 1 & 2 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | CMOS memory clear | JP13 | Pins 2 & 3 |
| | | | 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 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 2 |
|----------------------------+-------------------------------|
| 8MB | (1) 1M x 64 |
|----------------------------+-------------------------------|
| 16MB | (1) 2M x 64 |
|----------------------------+-------------------------------|
| 32MB | (1) 4M x 64 |
|----------------------------+-------------------------------|
| 64MB | (1) 8M x 64 |
|----------------------------+-------------------------------|
| 128MB | (1) 16M 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP8A | JP8B |
|------------------+--------------------+--------------------|
| 30MHz | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 33MHz | Pins 1 & 2 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION |
|------------------------------------------------------------|
| Multiplier | JP1A | JP1B |
|------------------+--------------------+--------------------|
| 4x | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 5x | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 6x | Pins 1 & 2 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (SINGLE) |
|------------------------------------------------------------|
| Voltage | JP2 |
|----------------------------+-------------------------------|
| 2.9v | Pins 3 & 4 closed |
|----------------------------+-------------------------------|
| 3.6v | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (DUAL) |
|------------------------------------------------------------|
| Voltage | V core | JP3 | JP4 |
|----------+---------+-------------------+-------------------|
| 3.3v | 2.9v | Pins 1 & 2 closed | Pins 1 & 2 closed |
|----------+---------+-------------------+-------------------|
| 3.3v | 3.6v | Pins 1 & 2 closed | Pins 1 & 2 closed |
|----------+---------+-------------------+-------------------|
| 2.9v | 2.9v | Pins 2 & 3 closed | Pins 2 & 3 closed |
|----------+---------+-------------------+-------------------|
| 3.6v | 3.6v | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+