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# GEMLIGHT COMPUTER, LTD.
GMB-P56SPC (VER. 1.10)
Device Type Mainboard
Processor CX 6X86/AM K5/ Pentium/Pentium MMX
Processor Speed 75/90/100/110/120/133/150/166/180/200MHz
Chip Set SIS 5596
Video Chip Set Unidentified
Maximum Onboard 512MB (EDO & SDRAM supported)
Memory
Maximum Video Unidentified
Memory
Cache 256KB
BIOS Award/AMI
Dimensions 220mm x 270mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
game port, IDE interface, parallel port, PS/2
mouse port, serial ports (2), VGA connector
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------------+----------+--------------+----------|
| Reset switch | J1 | IDE | J18 |
| | | interface 2 | |
|-----------------------+----------+--------------+----------|
| Suspend LED | J2 | Serial port | J19 |
| | | 1 | |
|-----------------------+----------+--------------+----------|
| Green PC connector | J3 | Serial port | J20 |
| | | 2 | |
|-----------------------+----------+--------------+----------|
| Speaker | J4 | VGA | J21 |
| | | connector | |
|-----------------------+----------+--------------+----------|
| IDE interface LED | J5 | Audio | J22 |
| | | extension | |
| | | card | |
| | | connector | |
|-----------------------+----------+--------------+----------|
| Power LED & keylock | J6 | Game port | J23 |
|-----------------------+----------+--------------+----------|
| IR connector | J12 | PS/2 mouse | J28 |
| | | interface | |
|-----------------------+----------+--------------+----------|
| Audio in - CD-ROM | J13 | AT power | J29 |
| (Mitsumi/Panasonic) | | connector | |
|-----------------------+----------+--------------+----------|
| Audio in - CD-ROM | J14 | PS/2 mouse | J30 |
| (Sony) | | port | |
|-----------------------+----------+--------------+----------|
| Floppy drive | J15 | IR connector | J33 |
| interface | | | |
|-----------------------+----------+--------------+----------|
| Parallel port | J16 | 32-bit PCI | PC1 - |
| | | slots | PC4 |
|-----------------------+----------+--------------+----------|
| IDE interface 1 | J17 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| » | CMOS memory normal operation | JP0 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | CMOS memory clear | JP0 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Flash BIOS voltage select 5v | JP5 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Flash BIOS voltage select 12v | JP5 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Linear burst mode (Cyrix 6x86 | JP7 | Closed |
| | only) enabled | | |
|---+-----------------------------------+-------+------------|
| | Linear burst mode (Cyrix 6x86 | JP7 | Open |
| | only) disabled | | |
|---+-----------------------------------+-------+------------|
| » | Onboard sound enabled | JP13 | Closed |
|---+-----------------------------------+-------+------------|
| | Onboard sound disabled | JP13 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG RAM |
|----------------+---------------------+---------------------|
| 256K | (2) 32K x 32 | 8/16/32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1MB x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 1MB x 36 | (2) 1MB x 36 |
|------------------+--------------------+--------------------|
| 16MB | (2) 2MB x 36 | None |
|------------------+--------------------+--------------------|
| 24MB | (2) 2MB x 36 | (2) 1MB x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 2MB x 36 | (2) 2MB x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4MB x 36 | None |
|------------------+--------------------+--------------------|
| 40MB | (2) 4MB x 36 | (2) 1MB x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4MB x 36 | (2) 2MB x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 4MB x 36 | (2) 4MB x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8MB x 36 | None |
|------------------+--------------------+--------------------|
| 72MB | (2) 8MB x 36 | (2) 1MB x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8MB x 36 | (2) 2MB x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8MB x 36 | (2) 4MB x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8MB x 36 | (2) 8MB x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 16MB x 36 | None |
|------------------+--------------------+--------------------|
| 136MB | (2) 16MB x 36 | (2) 1MB x 36 |
|------------------+--------------------+--------------------|
| 144MB | (2) 16MB x 36 | (2) 2MB x 36 |
|------------------+--------------------+--------------------|
| 160MB | (2) 16MB x 36 | (2) 4MB x 36 |
|------------------+--------------------+--------------------|
| 192MB | (2) 16MB x 36 | (2) 8MB x 36 |
|------------------+--------------------+--------------------|
| 256MB | (2) 16MB x 36 | (2) 16MB x 36 |
|------------------+--------------------+--------------------|
| 256MB | (2) 32MB x 36 | None |
|------------------+--------------------+--------------------|
| 264MB | (2) 32MB x 36 | (2) 1MB x 36 |
|------------------+--------------------+--------------------|
| 272MB | (2) 32MB x 36 | (2) 2MB x 36 |
|------------------+--------------------+--------------------|
| 288MB | (2) 32MB x 36 | (2) 4MB x 36 |
|------------------+--------------------+--------------------|
| 320MB | (2) 32MB x 36 | (2) 8MB x 36 |
|------------------+--------------------+--------------------|
| 384MB | (2) 32MB x 36 | (2) 16MB x 36 |
|------------------+--------------------+--------------------|
| 512MB | (2) 32MB x 36 | (2) 32MB x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
|Speed |Clock speed|Multiplier| JP2 | JP3 | S4 | S5 | S6 |
|------+-----------+----------+-----+-----+------+------+----|
|75MHz | 50MHz | 1.5x |1 & 2|1 & 2|Closed|Closed|Open|
|------+-----------+----------+-----+-----+------+------+----|
|90MHz | 60MHz | 1.5x |1 & 2|1 & 2|Closed| Open |Open|
|------+-----------+----------+-----+-----+------+------+----|
|100MHz| 66MHz | 1.5x |1 & 2|1 & 2| Open |Closed|Open|
|------+-----------+----------+-----+-----+------+------+----|
|120MHz| 60MHz | 2x |1 & 2|2 & 3|Closed| Open |Open|
|------+-----------+----------+-----+-----+------+------+----|
|133MHz| 66MHz | 2x |1 & 2|2 & 3| Open |Closed|Open|
|------+-----------+----------+-----+-----+------+------+----|
|150MHz| 60MHz | 2.5x |2 & 3|2 & 3|Closed| Open |Open|
|------+-----------+----------+-----+-----+------+------+----|
|166MHz| 66MHz | 2.5x |2 & 3|2 & 3| Open |Closed|Open|
|------+-----------+----------+-----+-----+------+------+----|
|180MHz| 60MHz | 3x |2 & 3|1 & 2|Closed| Open |Open|
|------+-----------+----------+-----+-----+------+------+----|
|200MHz| 66MHz | 3x |2 & 3|1 & 2| Open |Closed|Open|
|------------------------------------------------------------|
|Note: Designated pins are in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
|Speed |Clock speed|Multiplier| JP2 | JP3 | S4 | S5 | S6 |
|------+-----------+----------+------+------+----+------+----|
|166MHz| 66MHz | 2.5x |2 & 3 |2 & 3 |Open|Closed|Open|
|------+-----------+----------+------+------+----+------+----|
|200MHz| 66MHz | 3x |2 & 3 |1 & 2 |Open|Closed|Open|
|------------------------------------------------------------|
|Note: Designated pins are in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
|Speed | Clock |Multiplier| JP2 | JP3 | S4 | S5 | S6 |
| | speed | | | | | | |
|------+---------+----------+-----+-----+------+------+------|
|120MHz| 60MHz | 2x |1 & 2|2 & 3|Closed|Closed| Open |
|------+---------+----------+-----+-----+------+------+------|
|133MHz| 66MHz | 2x |1 & 2|2 & 3| Open | Open | Open |
|------+---------+----------+-----+-----+------+------+------|
|150MHz| 60MHz | 2.5x |1 & 2|2 & 3|Closed| Open | Open |
|------+---------+----------+-----+-----+------+------+------|
|166MHz| 66MHz | 2.5x |1 & 2|2 & 3| Open |Closed| Open |
|------+---------+----------+-----+-----+------+------+------|
|200MHz| 66MHz | 3x |1 & 2|2 & 3| Open | Open |Closed|
|------------------------------------------------------------|
|Note: Designated pins are in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
|Speed |Clock speed|Multiplier| JP2 | JP3 | S4 | S5 | S6 |
|------+-----------+----------+-----+-----+------+------+----|
|75MHz | 50MHz | 1.5x |1 & 2|1 & 2|Closed|Closed|Open|
|------+-----------+----------+-----+-----+------+------+----|
|90MHz | 60MHz | 1.5x |1 & 2|1 & 2|Closed| Open |Open|
|------+-----------+----------+-----+-----+------+------+----|
|100MHz| 66MHz | 1.5x |1 & 2|1 & 2| Open |Closed|Open|
|------+-----------+----------+-----+-----+------+------+----|
|120MHz| 60MHz | 2x |1 & 2|1 & 2|Closed| Open |Open|
|------+-----------+----------+-----+-----+------+------+----|
|133MHz| 66MHz | 2x |1 & 2|1 & 2| Open |Closed|Open|
|------+-----------+----------+-----+-----+------+------+----|
|150MHz| 60MHz | 2.5x |1 & 2|2 & 3|Closed| Open |Open|
|------+-----------+----------+-----+-----+------+------+----|
|166MHz| 66MHz | 2.5x |1 & 2|2 & 3| Open |Closed|Open|
+------------------------------------------------------------+
(IMG) IMG 2
+------------------------------------------------------------+
| AUDIO EXTENSION CARD CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------------+----------+---------------+----------|
| Audio extension card | CN1 | Line in | J3 |
| connector | | | |
|----------------------+----------+---------------+----------|
| Speaker out | J1 | Microphone | J4 |
|----------------------+----------+---------------+----------|
| Line out | J2 | VGA connector | J7 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (SINGLE) |
|------------------------------------------------------------|
| Voltage | Q4 | JP1 | S1 | S2 | S3 |
|---------+--------------+--------+--------+--------+--------|
| 3.4V | 2 | Closed | Closed | Closed | Closed |
| | Transistors | | | | |
| | installed | | | | |
|---------+--------------+--------+--------+--------+--------|
| 3.5V | 2 | Open | Closed | Closed | Closed |
| | Transistors | | | | |
| | installed | | | | |
|---------+--------------+--------+--------+--------+--------|
| 3.4V | 1 Transistor | Closed | N/A | N/A | N/A |
| | installed | | | | |
|---------+--------------+--------+--------+--------+--------|
| 3.5V | 1 Transistor | Closed | N/A | N/A | N/A |
| | installed | | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (DUAL) |
|------------------------------------------------------------|
| V | V | Q4 | JP1 | S1 | S2 | S3 |
| (I/O) | Core | | | | | |
|--------+-------+-------------+--------+------+------+------|
| 3.4V | 2.8V | 2 | Closed | Open | Open | Open |
| | | Transistors | | | | |
| | | installed | | | | |
+------------------------------------------------------------+