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# M TECHNOLOGY, INC.
R552 PENTIUM PCI/ISA
Processor CX M1/AM K5/Pentium
Processor Speed 75/90/100/120/133/150/166/180/200MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 128MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Award
Dimensions 304mm x 244mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse port, serial ports
(2), cache slot, USB connectors (2), ATX
power connector
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| ATX power | ATX | Speaker | J2 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN1 | Reset switch | J3 |
|-------------------+----------+------------------+----------|
| Parallel port | CN2 | Green PC | J4 |
| | | connector | |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN3 | IDE interface | J5 |
| | | LED | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN4 | 32-bit PCI slots | PC1 - |
| | | | PC4 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN5 | Cache slot | SL1 |
| interface | | | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN6 | USB connector 1 | USB1 |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN7 | USB connector 2 | USB2 |
|-------------------+----------+------------------+----------|
| Power LED & | J1 | | |
| keylock | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| » | CMOS memory normal operation | JP14 | Open |
|---+-----------------------------------+-------+------------|
| | CMOS memory clear | JP14 | Closed |
|---+-----------------------------------+-------+------------|
| | Monitor type select CGA | JP15 | Closed |
|---+-----------------------------------+-------+------------|
| | Monitor type select | JP15 | Open |
| | monochrome/EGA/VGA | | |
|---+-----------------------------------+-------+------------|
| » | PS/2 mouse enabled | JP16 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | PS/2 mouse disabled | JP16 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------+-----------------------+---------------------|
| 4MB | (2) 512K x 36 | None |
|--------------+-----------------------+---------------------|
| 6MB | (2) 512K x 36 | (2) 256K x 36 |
|--------------+-----------------------+---------------------|
| 8MB | (2) 1M x 36 | None |
|--------------+-----------------------+---------------------|
| 8MB | (2) 512K x 36 | (2) 512K 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 |
|--------------+-----------------------+---------------------|
| 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 |
|--------------+-----------------------+---------------------|
| 36MB | (2) 4M x 36 | (2) 512K 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 |
|--------------+-----------------------+---------------------|
| 68MB | (2) 8M x 36 | (2) 512K 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 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. If these |
| configurations are used, DIMM sockets must be empty. |
| Board also accepts x 32 SIMMs. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 2 | Bank 3 |
|---------------+----------------------+---------------------|
| 8MB | (1) 1M x 64 | None |
|---------------+----------------------+---------------------|
| 16MB | (1) 2M x 64 | None |
|---------------+----------------------+---------------------|
| 16MB | (1) 1M x 64 | (1) 1M x 64 |
|---------------+----------------------+---------------------|
| 24MB | (1) 2M x 64 | (1) 1M x 64 |
|---------------+----------------------+---------------------|
| 32MB | (1) 4M x 64 | None |
|---------------+----------------------+---------------------|
| 32MB | (1) 2M x 64 | (1) 2M x 64 |
|---------------+----------------------+---------------------|
| 40MB | (1) 4M x 64 | (1) 1M x 64 |
|---------------+----------------------+---------------------|
| 48MB | (1) 4M x 64 | (1) 2M x 64 |
|---------------+----------------------+---------------------|
| 64MB | (1) 8M x 64 | None |
|---------------+----------------------+---------------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 |
|---------------+----------------------+---------------------|
| 72MB | (1) 8M x 64 | (1) 1M x 64 |
|---------------+----------------------+---------------------|
| 80MB | (1) 8M x 64 | (1) 2M x 64 |
|---------------+----------------------+---------------------|
| 96MB | (1) 8M x 64 | (1) 4M x 64 |
|---------------+----------------------+---------------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 |
|------------------------------------------------------------|
| Note: If these configurations are used, DIMM sockets must |
| be empty. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP10 |
|----------------------------+-------------------------------|
| 3.3v | Pins 3 & 5, 4 & 6, closed |
|----------------------------+-------------------------------|
| 5v | Pins 1 & 3, 2 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | SL1 | TAG |
|-------+--------------+-----------------------+-------------|
| 256KB | (2) 32K x 32 | Not installed | (1) 32K x 8 |
|-------+--------------+-----------------------+-------------|
| 512KB | (2) 32K x 32 | 256KB module | (1) 32K x 8 |
| | | installed | |
|-------+--------------+-----------------------+-------------|
| 512KB | (2) 64K x 32 | 256KB module | (1) 32K x 8 |
| | | installed | |
+------------------------------------------------------------+
+---------------------------------------------------------------+
| CPU SPEED SELECTION (CYRIX) |
|---------------------------------------------------------------|
| CPU |Clock|Multiplier| JP6 | JP7 |JP8 |JP500 |JP501 |JP502 |
|speed |speed| | | | | | | |
|------+-----+----------+------+------+----+------+------+------|
|120MHz|50MHz| 2x | Open |Closed|Open| Open | Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|133MHz|55MHz| 2x | Open |Closed|Open|Closed| Open | Open |
|------+-----+----------+------+------+----+------+------+------|
|150MHz|60MHz| 2x |Closed|Closed|Open| Open | Open |Closed|
|------+-----+----------+------+------+----+------+------+------|
|166MHz|66MHz| 2x | Open |Closed|Open| Open |Closed| Open |
+---------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (AMD) |
|------------------------------------------------------------|
| CPU |Clock|Multiplier| JP6 |JP7 |JP8 |JP500|JP501 |JP502 |
|speed |speed| | | | | | | |
|------+-----+----------+------+----+----+-----+------+------|
|75MHz |50MHz| 1.5x | Open |Open|Open|Open | Open | Open |
|------+-----+----------+------+----+----+-----+------+------|
|90MHz |60MHz| 1.5x |Closed|Open|Open|Open | Open |Closed|
|------+-----+----------+------+----+----+-----+------+------|
|100MHz|66MHz| 1.5x | Open |Open|Open|Open |Closed| Open |
+------------------------------------------------------------+
+----------------------------------------------------------------+
| CPU SPEED SELECTION (INTEL) |
|----------------------------------------------------------------|
| CPU |Clock|Multiplier| JP6 | JP7 | JP8 |JP500|JP501 |JP502 |
|speed |speed| | | | | | | |
|------+-----+----------+------+------+------+-----+------+------|
|75MHz |50MHz| 1.5x | Open | Open | Open |Open | Open | Open |
|------+-----+----------+------+------+------+-----+------+------|
|90MHz |60MHz| 1.5x |Closed| Open | Open |Open | Open |Closed|
|------+-----+----------+------+------+------+-----+------+------|
|100MHz|66MHz| 1.5x | Open | Open | Open |Open |Closed| Open |
|------+-----+----------+------+------+------+-----+------+------|
|120MHz|60MHz| 2x |Closed|Closed| Open |Open | Open |Closed|
|------+-----+----------+------+------+------+-----+------+------|
|133MHz|66MHz| 2x | Open |Closed| Open |Open |Closed| Open |
|------+-----+----------+------+------+------+-----+------+------|
|150MHz|60MHz| 2.5x |Closed|Closed|Closed|Open | Open |Closed|
|------+-----+----------+------+------+------+-----+------+------|
|166MHz|66MHz| 2.5x | Open |Closed|Closed|Open |Closed| Open |
|------+-----+----------+------+------+------+-----+------+------|
|180MHz|60MHz| 3x |Closed| Open |Closed|Open | Open |Closed|
|------+-----+----------+------+------+------+-----+------+------|
|200MHz|66MHz| 3x | Open | Open |Closed|Open |Closed| Open |
+----------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION (SINGLE POWER CPU) |
|------------------------------------------------------------|
| CPU type | Voltage | JP5 | JP9 |
|-------------+----------+--------------------+--------------|
| CX M1/AM | 3.3v | 1 & 2, 3 & 4, 5 & | 1 & 2, 3 & 4 |
| K5/P54C | | 6 | |
|-------------+----------+--------------------+--------------|
| CX M1/AM | 3.45v | 1 & 2, 3 & 4, 5 & | 1 & 2 |
| K5/P54C | | 6 | |
|-------------+----------+--------------------+--------------|
| CX M1/AM | 3.5v | 1 & 2, 3 & 4, 5 & | Open |
| K5/P54C | | 6 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION(DUAL POWER CPU) |
|------------------------------------------------------------|
| CPU type | Voltage | Voltage | JP5 | JP9 | JP19 |
| | 1 | 2 | | | |
|-----------+---------+---------+------+------------+--------|
| P55C | 3.3v | 2.5v | Open | 1 & 2, 3 & | 1 & 2, |
| | | | | 4 | 3 & 4 |
|-----------+---------+---------+------+------------+--------|
| P55C | 3.45v | 2.7v | Open | 1 & 2 | 1 & 2 |
|-----------+---------+---------+------+------------+--------|
| P55C | 3.5v | 2.8v | Open | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLASH BIOS SELECTION |
|------------------------------------------------------------|
| Voltage | JP17 | JP18 |
|------------------+--------------------+--------------------|
| None | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 5v | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 12v | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+