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# SUPER MICRO
P55CMA, P55CMS (REV. 2.0)
Processor Pentium
Processor Speed 75/90/100/120/133/150/166MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 128MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options PS/2 mouse port, parallel port, serial ports
(2), 32-bit PCI slots (4), floppy drive
interface, IDE interfaces (2), cache slot,
VRM connector, Legacy connector, IR connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| VRM connector | J1 | External battery | JP30 |
|-------------------+----------+------------------+----------|
| Chassis fan power | J18 | Turbo LED | JP32 |
|-------------------+----------+------------------+----------|
| Power LED & | J32 | IR connector | JP68 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| IDE interface LED | J34 | Serial port 2 | JS1 |
|-------------------+----------+------------------+----------|
| Reset switch | J35 | Serial port 1 | JS2 |
|-------------------+----------+------------------+----------|
| Speaker | J39 | Parallel port | JS3 |
|-------------------+----------+------------------+----------|
| IDE interface 1 | J70 | Floppy drive | JS4 |
| | | interface | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | J71 | 32-bit PCI slots | PC1 - |
| | | | PC4 |
|-------------------+----------+------------------+----------|
| Legacy connector | J85 | Cache slot | SL1 |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | J96 | | |
|------------------------------------------------------------|
| Note: J18 may not be present on all boards. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | J28 | Closed |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J37 | Pins 1 & 2 |
| | alter | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J41 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | J42 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | J42 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J43 | Open |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | ISA CLCK = PCI CLCK/4 | J67 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | ISA CLCK = PCI CLCK/3 | J67 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 32 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 32 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 32 | (2) 1M x 32 |
|------------------+--------------------+--------------------|
| 24MB | (2) 1M x 32 | (2) 2M x 32 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 32 | None |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 32 | (2) 2M x 32 |
|------------------+--------------------+--------------------|
| 40MB | (2) 1M x 32 | (2) 4M x 32 |
|------------------+--------------------+--------------------|
| 48MB | (2) 2M x 32 | (2) 4M x 32 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 32 | None |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 32 | (2) 4M x 32 |
|------------------+--------------------+--------------------|
| 72MB | (2) 1M x 32 | (2) 8M x 32 |
|------------------+--------------------+--------------------|
| 80MB | (2) 2M x 32 | (2) 8M x 32 |
|------------------+--------------------+--------------------|
| 96MB | (2) 4M x 32 | (2) 8M x 32 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 32 | (2) 8M x 32 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | SL1 |
|----------------------------+-------------------------------|
| 256KB | 256KB module installed |
|----------------------------+-------------------------------|
| 512KB | 512KB module installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | J27 | J29 | J31 | J40 |
|------------+-----------+-----------+-----------+-----------|
| 75MHz | Open | Closed | Closed | Open |
|------------+-----------+-----------+-----------+-----------|
| 90MHz | Open | Closed | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| 100MHz | Open | Open | Closed | Open |
|------------+-----------+-----------+-----------+-----------|
| 120MHz | Closed | Closed | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| 133MHz | Closed | Open | Closed | Open |
|------------+-----------+-----------+-----------+-----------|
| 150MHz | Closed | Open | Closed | Closed |
|------------+-----------+-----------+-----------+-----------|
| 166MHz | Closed | Open | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP11 |
|----------------------------+-------------------------------|
| 3.3v | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 3.4v | Open |
|----------------------------+-------------------------------|
| 3.5v | Pins 1 & 2 closed |
+------------------------------------------------------------+