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# EURONE (HK) CO., LTD.
EM-5900
Device Type Mainboard
Processor CX 6X86/CX 6X86L/CX M2/IBM 6X86/IBM6X86L/IBM
M2/AM K5/ AM K6/Pentium
Processor Speed 75/90/100/120/133/150/166/180/200/233MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 256MB (EDO & SDRAM supported)
Memory
Maximum Video None
Memory
Cache 512KB
BIOS AMI
Dimensions 254mm x 218mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse interface, serial
ports (2), IR connector, USB connectors (2)
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN1 | External battery | J5 |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN2 | Reset switch | J7A |
|-------------------+----------+------------------+----------|
| Parallel port | CN3 | IDE interface | J7B |
| | | LED | |
|-------------------+----------+------------------+----------|
| Floppy drive | CN4 | Green PC LED | J7C |
| interface | | | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN5 | Green PC | J7D |
| | | connector | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN6 | Power LED & | J8A |
| | | keylock | |
|-------------------+----------+------------------+----------|
| Chassis fan power | FAN | Speaker | J8B |
|-------------------+----------+------------------+----------|
| IR connector | IR1 | 32-bit PCI slots | PC1 – |
| | | | PC4 |
|-------------------+----------+------------------+----------|
| USB connector 1 | J3 | PS/2 mouse | PS2 |
| | | interface | |
|-------------------+----------+------------------+----------|
| USB connector 2 | J4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| | Battery type select internal | J5 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | J5 | Pins 3 & 4 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured – do not | JP8C | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM/ SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 8MB | (2) 1M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 8MB | None | None | (1) 1M x | None |
| | | | 64 | |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 2M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 16MB | None | None | (1) 2M x | None |
| | | | 64 | |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 1M x 36 | None | None | (1) 1M x |
| | | | | 64 |
|------+-------------+-------------+------------+------------|
| 16MB | None | None | (1) 1M x | (1) 1M x |
| | | | 64 | 64 |
|------+-------------+-------------+------------+------------|
| 24MB | None | (2) 2M x 36 | (1) 1M x | None |
| | | | 64 | |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 4M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | None | None | (1) 4M x | None |
| | | | 64 | |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 2M x 36 | None | None | (1) 2M x |
| | | | | 64 |
|------+-------------+-------------+------------+------------|
| 32MB | None | (2) 2M x 36 | (1) 2M x | None |
| | | | 64 | |
|------+-------------+-------------+------------+------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 40MB | (2) 4M x 36 | None | None | (1) 1M x |
| | | | | 64 |
|------+-------------+-------------+------------+------------|
| 48MB | (2) 2M x 36 | None | None | (1) 4M x |
| | | | | 64 |
|------+-------------+-------------+------------+------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 48MB | (2) 4M x 36 | None | None | (1) 2M x |
| | | | | 64 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM/SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|----------+------------+------------+-----------+-----------|
| 64MB | (2) 8M x | None | None | None |
| | 36 | | | |
|----------+------------+------------+-----------+-----------|
| 64MB | None | None | None | (1) 8M x |
| | | | | 64 |
|----------+------------+------------+-----------+-----------|
| 64MB | (2) 4M x | (2) 4M x | None | None |
| | 36 | 36 | | |
|----------+------------+------------+-----------+-----------|
| 64MB | (2) 4M x | None | None | (1) 4M x |
| | 36 | | | 64 |
|----------+------------+------------+-----------+-----------|
| 72MB | (2) 8M x | (2) 1M x | None | None |
| | 36 | 36 | | |
|----------+------------+------------+-----------+-----------|
| 72MB | (2) 8M x | None | None | (1) 1M x |
| | 36 | | | 64 |
|----------+------------+------------+-----------+-----------|
| 80MB | (2) 2M x | None | None | (1) 8M x |
| | 36 | | | 64 |
|----------+------------+------------+-----------+-----------|
| 80MB | (2) 8M x | (2) 2M x | None | None |
| | 36 | 36 | | |
|----------+------------+------------+-----------+-----------|
| 80MB | (2) 8M x | None | None | (1) 2M x |
| | 36 | | | 64 |
|----------+------------+------------+-----------+-----------|
| 96MB | (2) 4M x | None | None | (1) 8M x |
| | 36 | | | 64 |
|----------+------------+------------+-----------+-----------|
| 96MB | (2) 8M x | (2) 4M x | None | None |
| | 36 | 36 | | |
|----------+------------+------------+-----------+-----------|
| 96MB | (2) 8M x | None | None | (1) 4M x |
| | 36 | | | 64 |
|----------+------------+------------+-----------+-----------|
| 128MB | (2) 8M x | (2) 8M x | None | None |
| | 36 | 36 | | |
|----------+------------+------------+-----------+-----------|
| 128MB | (2) 8M x | None | None | (1) 8M x |
| | 36 | | | 64 |
|----------+------------+------------+-----------+-----------|
| 192MB | None | (2) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 64 | 64 |
|----------+------------+------------+-----------+-----------|
| 256MB | (2) 8M x | (2) 8M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 64 | 64 |
|------------------------------------------------------------|
| Note: Board accepts EDO & SDRAM memory. Banks 0 & 1, 2 & 3 |
| are interchangeable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP1 | JP2 |
|------------------+--------------------+--------------------|
| 3.3v | Pins 2 & 3 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 5v | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 512KB | (2) 64K x 32 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier|JP3A |JP3B |JP3C |JP8A |JP8B |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 120MHz | 50MHz | 2x |2 & 3|2 & 3|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 133MHz | 55MHz | 2x |2 & 3|1 & 2|2 & 3|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2x |2 & 3|1 & 2|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier|JP3A |JP3B |JP3C |JP8A |JP8B |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 120MHz | 50MHz | 2x |2 & 3|2 & 3|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 133MHz | 55MHz | 2x |2 & 3|1 & 2|2 & 3|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2x |2 & 3|1 & 2|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX 6X86L) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier|JP3A |JP3B |JP3C |JP8A |JP8B |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2x |2 & 3|1 & 2|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 75MHz | 2x |1 & 2|2 & 3|2 & 3|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (IBM 6X86L) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier|JP3A |JP3B |JP3C |JP8A |JP8B |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2x |2 & 3|1 & 2|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 75MHz | 2x |1 & 2|2 & 3|2 & 3|2 & 3|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (CX M2) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier|JP3A |JP3B |JP3C |JP8A |JP8B |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x |1 & 2|2 & 3|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 3x |1 & 2|2 & 3|1 & 2|1 & 2|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 233MHz | 66MHz | 3.5x |1 & 2|2 & 3|1 & 2|1 & 2|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K5) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier|JP3A |JP3B |JP3C |JP8A |JP8B |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 75MHz | 50MHz | 1.5x |2 & 3|2 & 3|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 90MHz | 60MHz | 1.5x |2 & 3|1 & 2|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 100MHz | 66MHz | 1.5x |1 & 2|2 & 3|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 120MHz | 60MHz | 2x |2 & 3|1 & 2|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 133MHz | 66MHz | 2x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2.5x |2 & 3|1 & 2|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x |1 & 2|2 & 3|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 180MHz | 60MHz | 3x |2 & 3|1 & 2|1 & 2|1 & 2|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 3x |1 & 2|2 & 3|1 & 2|1 & 2|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AM K6) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier|JP3A |JP3B |JP3C |JP8A |JP8B |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x |1 & 2|2 & 3|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 3x |1 & 2|2 & 3|1 & 2|1 & 2|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 233MHz | 66MHz | 3.5x |1 & 2|2 & 3|1 & 2|1 & 2|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier|JP3A |JP3B |JP3C |JP8A |JP8B |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 75MHz | 50MHz | 1.5x |2 & 3|2 & 3|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 90MHz | 60MHz | 1.5x |2 & 3|1 & 2|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 100MHz | 66MHz | 1.5x |1 & 2|2 & 3|1 & 2|1 & 2|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 120MHz | 60MHz | 2x |2 & 3|1 & 2|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 133MHz | 66MHz | 2x |1 & 2|2 & 3|1 & 2|2 & 3|1 & 2|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 150MHz | 60MHz | 2.5x |2 & 3|1 & 2|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x |1 & 2|2 & 3|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 180MHz | 60MHz | 3x |2 & 3|1 & 2|1 & 2|1 & 2|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 3x |1 & 2|2 & 3|1 & 2|1 & 2|2 & 3|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL MMX) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier|JP3A |JP3B |JP3C |JP8A |JP8B |
| | speed | | | | | | |
|---------+---------+----------+-----+-----+-----+-----+-----|
| 166MHz | 66MHz | 2.5x |1 & 2|2 & 3|1 & 2|2 & 3|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 200MHz | 66MHz | 3x |1 & 2|2 & 3|1 & 2|1 & 2|2 & 3|
|---------+---------+----------+-----+-----+-----+-----+-----|
| 233MHz | 66MHz | 3.5x |1 & 2|2 & 3|1 & 2|1 & 2|1 & 2|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP10A | JP10B |
|------------------+--------------------+--------------------|
| AM K5 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| P54C | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| CX M2 | Pins 2 & 3 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| AM K6 | Pins 2 & 3 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| CX 6X86 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| IBM 6X86 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| CX 6X86L | Pins 2 & 3 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| IBM 6X86L | Pins 2 & 3 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| P55C | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP7A | JP7B | JP7C | JP7D | JP7E |
|----------+---------+---------+---------+---------+---------|
| 2.5v | Open | Open | Open | Open | Open |
|----------+---------+---------+---------+---------+---------|
| 2.8v | Open | Open | Open | Open | Closed |
|----------+---------+---------+---------+---------+---------|
| 2.9v | Open | Open | Open | Closed | Open |
|----------+---------+---------+---------+---------+---------|
| 3.2v | Open | Open | Closed | Open | Open |
|----------+---------+---------+---------+---------+---------|
| 3.3v | Open | Closed | Open | Open | Open |
|----------+---------+---------+---------+---------+---------|
| 3.5v | Closed | Open | Open | Open | Open |
+------------------------------------------------------------+