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# MICRO-STAR INTERNATIONAL CO., LTD.
MS-5120
Processor Pentium
Processor 75/90/100/120/133MHz
Speed
Chip Set Intel
Max. Onboard 128MB
DRAM
Cache 256KB
BIOS AMI
Dimensions 260mm x 220mm
I/O Options Parallel port, serial ports (2), IDE interfaces
(2), 32-bit PCI slots (3), green PC connector,
floppy drive interface, PS/2 mouse connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+-----------+---------------+-----------|
| IDE interface | CN1 | Speaker | JFP pins |
| (primary) | | | 7 - 10 |
|--------------------+-----------+---------------+-----------|
| IDE interface | CN2 | Turbo LED | JFP pins |
| (secondary) | | | 12 & 13 |
|--------------------+-----------+---------------+-----------|
| Floppy drive | CN3 | Turbo switch | JFP pins |
| interface | | | 15 - 17 |
|--------------------+-----------+---------------+-----------|
| Parallel port | CN4 | Reset switch | JFP pins |
| | | | 19 & 20 |
|--------------------+-----------+---------------+-----------|
| Serial port 2 | CN5 | IDE interface | JFP pins |
| | | LED | 21 & 22 |
|--------------------+-----------+---------------+-----------|
| Serial port 1 | CN6 | Green PC | JG3 |
| | | connector | |
|--------------------+-----------+---------------+-----------|
| PS/2 Mouse | CN7 | 32-bit PCI | PCI1 - |
| connector | | slots | PCI3 |
|--------------------+-----------+---------------+-----------|
| Chassis fan power | JFAN | Voltage | JVRM |
| | | regulator | |
| | | module | |
|--------------------+-----------+---------------+-----------|
| Power LED & | JFP pins | | |
| keylock | 1 - 5 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------+-----------+-------------------|
| ยป | PCI bus clock/3 | JSCLK | pins 1 & 2 closed |
|---+------------------------+-----------+-------------------|
| | PCI bus clock/4 | JSCLK | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 4MB | NONE | NONE | (1) 1M x | NONE |
| | | | 36 | |
|-------+-------------+------------+------------+------------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 8MB | NONE | NONE | (1) 2M x | NONE |
| | | | 36 | |
|-------+-------------+------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 8MB | NONE | NONE | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 16MB | NONE | NONE | (1) 4M x | NONE |
| | | | 36 | |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 16MB | NONE | NONE | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 32MB | NONE | NONE | (1) 8M x | NONE |
| | | | 36 | |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 32MB | NONE | NONE | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 2M x 36 | (1) 2M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 16M x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 64MB | NONE | NONE | (1) 16M x | NONE |
| | | | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | NONE | NONE | (1) 8M x | (1) 8M x |
| | | | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 8M x 36 | (1) 8M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 2M x 36 | (1) 2M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 8M x 36 | (1) 8M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 32M x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 128MB | NONE | NONE | (1) 32M x | NONE |
| | | | 36 | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 16M x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | NONE | NONE | (1) 16M x | (1) 16M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: Cache is factory installed and not configurable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JK |
|----------------------------+-------------------------------|
| 75MHz | pins 1 & 3, 2 & 4 closed |
|----------------------------+-------------------------------|
| 90MHz | pins 1 & 3 closed |
|----------------------------+-------------------------------|
| 100MHz | pins 2 & 4 closed |
|----------------------------+-------------------------------|
| 120MHz | pins 1 & 3 closed |
|----------------------------+-------------------------------|
| 133MHz | pins 2 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JVCC3 |
|-------------------------------+----------------------------|
| 3.4v | Closed |
|-------------------------------+----------------------------|
| 3.5v | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS/CORE RATIO CONFIGURATION |
|------------------------------------------------------------|
| P54C/CQS/CS | P54CS POR(C-step) | JC1 | JC2 |
|---------------+-------------------+------------+-----------|
| 2/3 | 2/3 | Open | Open |
|---------------+-------------------+------------+-----------|
| 1/2 | 1/2 | Closed | Open |
|---------------+-------------------+------------+-----------|
| 1/3 | 1/3 | Open | Closed |
|---------------+-------------------+------------+-----------|
| 1/4 | 2/5 | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VOLTAGE REGULATOR MODULE PIN IDENTIFICATION |
|------------------------------------------------------------|
| Pin | Purpose | Pin | Purpose |
|-------------+-----------------+------------+---------------|
| 1 | VSS | 16 | VSS |
|-------------+-----------------+------------+---------------|
| 2 | VSS | 17 | VSS |
|-------------+-----------------+------------+---------------|
| 3 | ND | 18 | V/IO |
|-------------+-----------------+------------+---------------|
| 4 | V/IO | 19 | V/IO |
|-------------+-----------------+------------+---------------|
| 5 | 3.3v | 20 | 3.3v |
|-------------+-----------------+------------+---------------|
| 6 | 3.3v | 21 | 3.3v |
|-------------+-----------------+------------+---------------|
| 7 | VCORE | 22 | VCORE |
|-------------+-----------------+------------+---------------|
| 8 | VCORE | 23 | VCORE |
|-------------+-----------------+------------+---------------|
| 9 | VSS | 24 | VCORE |
|-------------+-----------------+------------+---------------|
| 10 | VCORE | 25 | VCORE |
|-------------+-----------------+------------+---------------|
| 11 | PRGOOD | 26 | UPVRM# |
|-------------+-----------------+------------+---------------|
| 12 | SENSE | 27 | DISABLE |
|-------------+-----------------+------------+---------------|
| 13 | VSS | 28 | VSS |
|-------------+-----------------+------------+---------------|
| 14 | 5v | 29 | 5v |
|-------------+-----------------+------------+---------------|
| 15 | 5v | 30 | 5v |
|------------------------------------------------------------|
| Note: The purpose of the Voltage Regulator Module is to |
| allow different voltage processors to be supported by the |
| motherboard. |
+------------------------------------------------------------+