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# M TECHNOLOGY, INC.
R525 PENTIUM PCI (VER.2)
Processor Pentium
Processor Speed 75/90/100/120/133/150MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 128MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Award
Dimensions 330mm x 218mm
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), VRM connector, cache slot
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN1 | Power LED & | J1 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN2 | Speaker | J2 |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN3 | Turbo switch | J3 |
|-------------------+----------+------------------+----------|
| Parallel port | CN4 | Turbo LED | J4 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN5 | Reset switch | J5 |
| interface | | | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN6 | Green PC | J6 |
| | | connector | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN7 | 32-bit PCI slots | PC1 - |
| | | | PC4 |
|-------------------+----------+------------------+----------|
| VRM connector | CN8 | Cache slot | SL1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+--------+-----------|
| | Pipeline disabled | JP42 | Open |
|---+-----------------------------------+--------+-----------|
| | Pipeline enabled | JP42 | Closed |
|---+-----------------------------------+--------+-----------|
| » | Cache type select write back | JP43 | Open |
|---+-----------------------------------+--------+-----------|
| | Cache type select write through | JP43 | Closed |
|---+-----------------------------------+--------+-----------|
| » | CMOS memory normal operation | JP54 | Open |
|---+-----------------------------------+--------+-----------|
| | CMOS memory clear | JP54 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 24MB | (2) 1M x 36 | (2) 2M 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 |
|------------------+--------------------+--------------------|
| 40MB | (2) 1M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4M x 36 | (2) 2M 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 |
|------------------+--------------------+--------------------|
| 72MB | (2) 1M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 4M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG | SL1 |
|-----------+-------------+-----------------+----------------|
| 256KB (A) | (8) 32K x 8 | (1) 8K/16K/32K | Not installed |
| | | x 8 | |
|-----------+-------------+-----------------+----------------|
| 256KB (B) | None | None | 256KB module |
| | | | installed |
|-----------+-------------+-----------------+----------------|
| 512KB (A) | (8) 64K x 8 | (1) 16K/32K x 8 | Not installed |
|-----------+-------------+-----------------+----------------|
| 512KB (B) | None | None | 512KB module |
| | | | installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP5 | JP36 | JP37 |
|---------+------------------+----------------+--------------|
| 256KB | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
|---------+------------------+----------------+--------------|
| 512KB | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|------------------------------------------------------------|
| Note: These settings are only valid if standard cache is |
| installed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP38 |
|-------------------------------+----------------------------|
| Standard cache | Pins 1 & 2 closed |
|-------------------------------+----------------------------|
| Pipeline burst cache | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP3 | JP4 |
|------------------+--------------------+--------------------|
| Mixed voltage | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 3.3v | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP28 | JP29 | JP31 | JP40 | JP41 |
|----------+----------+----------+---------+--------+--------|
| 75MHz | Open | Open | 1 & 2 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 90MHz | Open | Closed | 2 & 3 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 100MHz | Closed | Closed | 2 & 3 | 1 & 2 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 120MHz | Open | Closed | 2 & 3 | 1 & 2 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 133MHz | Closed | Closed | 2 & 3 | 1 & 2 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 150MHz | Open | Closed | 2 & 3 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | CN8 | JP32 |
|------------------+--------------------+--------------------|
| P54CX | Pins A6 & A7, B6 & | Open |
| | B7 closed | |
|------------------+--------------------+--------------------|
| P55C 2.5v | Open | Pins 1 & 2, 3 & 4, |
| | | 5 & 6 closed |
|------------------+--------------------+--------------------|
| P55C 2.5v on VRM | VRM installed | Open |
|------------------+--------------------+--------------------|
| P55CT | VRM installed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP44 | JP45 | JP46 |
|---------------+---------------+---------------+------------|
| 3.3v | Closed | Open | Open |
|---------------+---------------+---------------+------------|
| 3.45v - 3.6v | Open | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | JP6 | JP7 |
|------------------+--------------------+--------------------|
| | 1 | Pins 2 & 3 closed | Pins 2 & 3 closed |
|----+-------------+--------------------+--------------------|
| » | 3 | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PS/2 MOUSE SELECTION |
|------------------------------------------------------------|
| Setting | JP19 | JP20 | JP21 | JP22 | JP23 |
|------------+---------+---------+---------+--------+--------|
| Disabled | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|------------+---------+---------+---------+--------+--------|
| Enabled | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLASH BIOS SELECTION |
|------------------------------------------------------------|
| Setting | JP50 | JP51 |
|-------------------+--------------------+-------------------|
| Normal mode | Pins 2 & 3 closed | Pins 2 & 3 closed |
|-------------------+--------------------+-------------------|
| Programming mode | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+