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# GEMLIGHT COMPUTER, LTD.
GMB-P54SPS (VER. 2.00)
Processor CX M1/Pentium
Processor Speed 75/90/100/120/133MHz
Chip Set SIS
Video Chip Set None
Maximum Onboard 128MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256/512/1024KB
BIOS Award
Dimensions 270mm x 220mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
game interface, green PC connector, IDE
interfaces (2), parallel port, serial ports
(2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Chassis fan power | J1 | IDE interface 1 | J9 |
|-------------------+----------+------------------+----------|
| IDE interface LED | J2 | Serial port 1 | J12 |
|-------------------+----------+------------------+----------|
| Power LED & | J3 | Serial port 2 | J13 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J4 | Game interface | J14 |
|-------------------+----------+------------------+----------|
| Turbo switch | J5 | Parallel port | J15 |
|-------------------+----------+------------------+----------|
| Turbo LED | J6 | Floppy drive | J16 |
| | | interface | |
|-------------------+----------+------------------+----------|
| Reset switch | J7 | Green PC | JP11 |
| | | connector | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | J8 | 32-bit PCI slots | PC1 - |
| | | | PC4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| » | CMOS memory normal operation | JP1 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | CMOS memory clear | JP1 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Cache write cycle invalid during | JP4 | Pins 2 & 3 |
| | write cycle | | closed |
|---+-----------------------------------+-------+------------|
| | Cache write cycle always invalid | JP4 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | CPU pipeline mode disabled | JP5 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | CPU pipeline mode enabled | JP5 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | CPU internal cache write select | JP6 | Pins 1 & 2 |
| | write back | | closed |
|---+-----------------------------------+-------+------------|
| | CPU internal cache write select | JP6 | Pins 2 & 3 |
| | write through | | closed |
|---+-----------------------------------+-------+------------|
| » | Monitor type select color | JP12 | Closed |
|---+-----------------------------------+-------+------------|
| | Monitor type select monochrome | JP12 | Open |
|---+-----------------------------------+-------+------------|
| » | Parallel port IRQ select IRQ7 | JP18 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Parallel port IRQ select IRQ5 | JP18 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 2MB | (2) 256K x 36 | None |
|------------------+--------------------+--------------------|
| 4MB | (2) 512K x 36 | None |
|------------------+--------------------+--------------------|
| 4MB | (2) 256K x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 6MB | (2) 512K x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 36 | None |
|------------------+--------------------+--------------------|
| 8MB | (2) 512K x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 10MB | (2) 1M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 12MB | (2) 1M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 18MB | (2) 2M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 20MB | (2) 2M x 36 | (2) 512K 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 |
|------------------+--------------------+--------------------|
| 34MB | (2) 4M x 36 | (2) 256K x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------+----------------------+----------------------|
| 36MB | (2) 4M x 36 | (2) 512K x 36 |
|--------------+----------------------+----------------------|
| 40MB | (2) 1M x 36 | (2) 4M 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 |
|--------------+----------------------+----------------------|
| 66MB | (2) 8M x 36 | (2) 256K x 36 |
|--------------+----------------------+----------------------|
| 68MB | (2) 512K x 36 | (2) 8M x 36 |
|--------------+----------------------+----------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
|--------------+----------------------+----------------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 |
|--------------+----------------------+----------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|--------------+----------------------+----------------------|
| 128MB | (2) 16M x 36 | None |
|--------------+----------------------+----------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. Banks are interchangeable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 256KB | (8) 32K x 8 | (1) 8K/16K x 8 |
|------------------+--------------------+--------------------|
| 512KB | (8) 64K x 8 | (1) 16K/32K x 8 |
|------------------+--------------------+--------------------|
| 1MB | (8) 128K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP7 | JP8 | JP9 |
|---------+-------------------+-------------------+----------|
| 256KB | Pins 1 & 2 closed | Pins 1 & 2 closed | Closed |
|---------+-------------------+-------------------+----------|
| 512KB | Pins 2 & 3 closed | Pins 1 & 2 closed | Open |
|---------+-------------------+-------------------+----------|
| 1MB | Pins 2 & 3 closed | Pins 2 & 3 closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
|CPU speed|Clock speed|Multiplier| JP0 | S0 | S1 | S2 |
|---------+-----------+----------+------+------+------+------|
| 75MHz | 50MHz | 1.5x |1 & 2 | Open | Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 90MHz | 60MHz | 1.5x |1 & 2 | Open |Closed| Open |
|---------+-----------+----------+------+------+------+------|
| 100MHz | 66MHz | 1.5x |1 & 2 |Closed| Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 120MHz | 60MHz | 2x |2 & 3 | Open |Closed| Open |
|---------+-----------+----------+------+------+------+------|
| 133MHz | 66MHz | 2x |2 & 3 |Closed| Open |Closed|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP01 |
|-------------------------------+----------------------------|
| CX M1 | Closed |
|-------------------------------+----------------------------|
| P54C/CS/C-VR | Closed |
|-------------------------------+----------------------------|
| P54CT/C-VRE | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | JP22 | JP23 |
|------------------+--------------------+--------------------|
| » | Printer | Open | Open |
|---+--------------+--------------------+--------------------|
| | 1 | Pins 1 & 3 closed | Pins 1 & 3 closed |
|---+--------------+--------------------+--------------------|
| | 3 | Pins 2 & 4 closed | Pins 2 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS SELECTION |
|------------------------------------------------------------|
| Type | JP2 | JP3 |
|------------------+--------------------+--------------------|
| » | EPROM | Pins 2 & 3 closed | Pins 2 & 3 closed |
|---+--------------+--------------------+--------------------|
| | 12v flash | Pins 1 & 2 closed | Pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| | 5v flash | Pins 2 & 3 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+