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# SUPER MICRO
P55CMA/P55CMS (REV. 1.1)
Processor Pentium
Processor 75/90/100/120/133MHz
Speed
Chip Set Intel
Max. Onboard 128MB
DRAM
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 module connector,
Legacy connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| VRM module | J1 | External battery | JP30 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Chassis fan power | J18 | Turbo LED | JP32 |
|-------------------+----------+------------------+----------|
| Power LED & | J32 | Infra red | JP68 |
| keylock | | connector | |
|-------------------+----------+------------------+----------|
| 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 and J96 are optional and may not be |
| present. The location of J18 is unidentified. The |
| size of the VRM module is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | J28 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J37 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J41 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | J42 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J42 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | ISA CLCK select PCI CLCK/4 | J67 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | ISA CLCK select PCI CLCK/3 | J67 | pins 1 & 2 |
| | | | 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) 1M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 36 | NONE |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 1M x 36 | (2) 4M 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) 1M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 4M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: To install 256KB or 512KB cache, install specific |
| card in SL1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP11 |
|----------------------------+-------------------------------|
| 3.3v | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 3.4v | Open |
|----------------------------+-------------------------------|
| 3.5v | pins 1 & 2 closed |
+------------------------------------------------------------+