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# GEMLIGHT COMPUTER, LTD.
GMB-P56SPC (VER. 1.11)
Processor CX M1/AM K5/Pentium
Processor Speed 75/90/100/120/133/150/166/180/200MHz
Chip Set SIS
Video Chip Set None
Maximum Onboard 512MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256KB
BIOS AMI/Award
Dimensions 270mm x 220mm
I/O Options 32-bit PCI slots (4), CD-ROM connectors (2),
floppy drive interface, green PC connector,
IDE interfaces (2), parallel port, PS/2 mouse
interface, serial ports (2), VGA feature
connector, VGA interface, IR connectors (2),
game interface
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------------+----------+-------------+----------|
| Reset switch | J1 | IDE | J17 |
| | | interface 1 | |
|------------------------+----------+-------------+----------|
| Green PC LED | J2 | IDE | J18 |
| | | interface 2 | |
|------------------------+----------+-------------+----------|
| Green PC connector | J3 | Serial port | J19 |
| | | 1 | |
|------------------------+----------+-------------+----------|
| Speaker | J4 | Serial port | J20 |
| | | 2 | |
|------------------------+----------+-------------+----------|
| IDE interface LED | J5 | Audio | J21 |
| | | expansion | |
| | | interface | |
|------------------------+----------+-------------+----------|
| Power LED & keylock | J6 | Game | J23 |
| | | interface | |
|------------------------+----------+-------------+----------|
| IR connector | J12 | PS/2 mouse | J28 |
| | | interface | |
|------------------------+----------+-------------+----------|
| CD-ROM connector | J13 | VGA feature | J29 |
| (Panasonic/Mitsumi) | | connector | |
|------------------------+----------+-------------+----------|
| CD-ROM connector | J14 | IR | J33 |
| (Sony) | | connector | |
|------------------------+----------+-------------+----------|
| Floppy drive interface | J15 | 32-bit PCI | PC1 - |
| | | slots | PC4 |
|------------------------+----------+-------------+----------|
| Parallel port | J16 | | |
|------------------------------------------------------------|
| Note: J21 may be a 2 x 8 connector on some board |
| revisions. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 12v | JP5 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Flash BIOS voltage select 5v | JP5 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Linear burst mode enabled (CX M1 | JP7 | Closed |
| | only) | | |
|---+-----------------------------------+-------+------------|
| | Linear burst mode disabled (all | JP7 | Open |
| | other CPU types) | | |
|---+-----------------------------------+-------+------------|
| | On board sound chip enabled | JP13 | Closed |
|---+-----------------------------------+-------+------------|
| | On board sound chip disabled | JP13 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM 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) 2M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 36 | None |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 2M x 36 | (2) 4M 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) 2M x 36 | (2) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------+------------------------+--------------------|
| 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 |
|--------------+------------------------+--------------------|
| 256MB | (2) 32M x 36 | None |
|--------------+------------------------+--------------------|
| 264MB | (2) 32M x 36 | (2) 1M x 36 |
|--------------+------------------------+--------------------|
| 272MB | (2) 32M x 36 | (2) 2M x 36 |
|--------------+------------------------+--------------------|
| 288MB | (2) 32M x 36 | (2) 4M x 36 |
|--------------+------------------------+--------------------|
| 320MB | (2) 32M x 36 | (2) 8M x 36 |
|--------------+------------------------+--------------------|
| 384MB | (2) 32M x 36 | (2) 16M x 36 |
|--------------+------------------------+--------------------|
| 512MB | (2) 32M x 36 | (2) 32M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. Board also accepts x 32 |
| SIMMs. Banks are interchangeable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 256KB | (2) 32K x 32 | (1) 8K16K/32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CYRIX) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP2 | JP3 | S4 | S5 | S6 |
| speed | speed | | | | | | |
|-------+--------+----------+-----+-----+------+------+------|
|120MHz | 50MHz | 2x |1 & 2|2 & 3|Closed|Closed| Open |
|-------+--------+----------+-----+-----+------+------+------|
|133MHz | 55MHz | 2x |1 & 2|2 & 3| Open | Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|150MHz | 60MHz | 2x |1 & 2|2 & 3|Closed| Open | Open |
|-------+--------+----------+-----+-----+------+------+------|
|166MHz | 66MHz | 3x |1 & 2|2 & 3| Open |Closed| Open |
|-------+--------+----------+-----+-----+------+------+------|
|200MHz | 66MHz | 3x |1 & 2|2 & 3| Open | Open |Closed|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AMD) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP2 | JP3 | S4 | S5 | S6 |
| speed | speed | | | | | | |
|-------+----------+----------+-----+-----+------+------+----|
| 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 | 1.5x |1 & 2|1 & 2|Closed| Open |Open|
|-------+----------+----------+-----+-----+------+------+----|
|133MHz | 66MHz | 2x |1 & 2|1 & 2| Open |Closed|Open|
|-------+----------+----------+-----+-----+------+------+----|
|150MHz | 66MHz | 2x |1 & 2|2 & 3|Closed| Open |Open|
|-------+----------+----------+-----+-----+------+------+----|
|166MHz | 66MHz | 2x |1 & 2|2 & 3| Open |Closed|Open|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
| CPU | Clock |Multiplier| JP2 | JP3 | S4 | S5 | S6 |
| speed | speed | | | | | | |
|-------+----------+----------+-----+-----+------+------+----|
| 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: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | V core | JP1 | S1 | S2 | S3 |
|---------------+--------+--------+--------+--------+--------|
| 3.4v (single) | N/A | Closed | Closed | Closed | Closed |
|---------------+--------+--------+--------+--------+--------|
| 3.4v (dual) | 2.9v | Closed | Open | Open | Open |
|---------------+--------+--------+--------+--------+--------|
| 3.5v (single) | N/A | Open | Closed | Closed | Closed |
+------------------------------------------------------------+