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# MICRO-STAR INTERNATIONAL CO., LTD.
MS-4145
Processor 80486SX/SL80486SX/AM486DX/(SL)AM486DX/80486DX/
SL80486DX/CX486DX2/IBM486DX2/SGS486DX2/TI486DX2/
AM486DX2/ODP486DX2/80486DX2/SL80486DX2/SL80486DX4/
P24D/P24T/CX5X86/(SL)AM X5
Processor 25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/
Speed 100(internal)/120(internal)/133(internal)/160(internal)MHz
Chip Set ALI
Video Chip None
Set
Maximum 64MB
Onboard
Memory
Maximum None
Video
Memory
Cache 128/256/512KB
BIOS Award
Dimensions 220mm x 220mm
I/O 32-bit PCI slots (3), floppy drive interface, IDE interfaces
Options (2), parallel port, serial ports (2)
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+------------------+-----------|
| Serial port 1 | CN1 | Green PC LED | JG1 |
|------------------+----------+------------------+-----------|
| Serial port 2 | CN2 | Power LED & | JFP/pins |
| | | keylock | 1 - 5 |
|------------------+----------+------------------+-----------|
| Floppy drive | CN3 | Speaker | JFP/pins |
| interface | | | 7 - 10 |
|------------------+----------+------------------+-----------|
| Parallel port | CN4 | Turbo LED | JFP/pins |
| | | | 12 & 13 |
|------------------+----------+------------------+-----------|
| IDE interface 2 | CN5 | Turbo switch | JFP/pins |
| | | | 15 - 17 |
|------------------+----------+------------------+-----------|
| IDE interface 1 | CN6 | Reset switch | JFP/pins |
| | | | 19 & 20 |
|------------------+----------+------------------+-----------|
| Chassis fan | FAN | IDE interface | JFP/pins |
| power | | LED | 21 & 22 |
|------------------+----------+------------------+-----------|
| External battery | JBAT | 32-bit PCI slots | PC1 – PC3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Battery type select internal | JBAT | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Battery type select external | JBAT | Closed |
|---+---------------------------------+-------+--------------|
| » | Parallel port address select | JIRQ | Pins 1 & 2 |
| | 378 | | closed |
|---+---------------------------------+-------+--------------|
| | Parallel port address select | JIRQ | Pins 2 & 3 |
| | 278 | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured – do not | JS3 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 4MB | (1) 1M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 8MB | (1) 2M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 12MB | (1) 1M x 36 | (1) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 16MB | (1) 4M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 16MB | (1) 1M x 36 | (1) 2M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 4M x 36 | (1) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 32MB | (1) 8M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 40MB | (1) 2M x 36 | (1) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 40MB | (1) 4M x 36 | (1) 2M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 40MB | (1) 1M x 36 | (1) 8M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 48MB | (1) 4M x 36 | (1) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 64MB | (1) 4M x 36 | (1) 8M x 36 | (1) 4M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------------+---------------+-------------+----------------|
| 128KB | (4) 32K x 8 | None | (1) 8K/16K/32K |
| | | | x 8 |
|-------------+---------------+-------------+----------------|
| 256KB (A) | (4) 32K x 8 | (4) 32K x 8 | (1) 8K/16K/32K |
| | | | x 8 |
|-------------+---------------+-------------+----------------|
| 256KB (B) | (2) 64K x 32 | None | (1) 8K/16K/32K |
| | | | x 8 |
|------------------------------------------------------------|
| Note: Board also accepts 512KB cache. The chip sizes and |
| jumper settings are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JS1 | JS2 | JS4 |
|-----------+----------------+---------------+---------------|
| 128KB | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (A) | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (B) | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JK1 | JK2 |
|---------+-------------------------+------------------------|
| 25MHz | Open | Pins 1 & 2 closed |
|---------+-------------------------+------------------------|
| 33MHz | Pins 1 & 2, 3 & 4 | Pins 1 & 2 closed |
| | closed | |
|---------+-------------------------+------------------------|
| 40MHz | Pins 1 & 2 closed | Pins 2 & 3, 4 & 5 |
| | | closed |
|---------+-------------------------+------------------------|
| 50iMHz | Open | Pins 1 & 2 closed |
|---------+-------------------------+------------------------|
| 66iMHz | Pins 1 & 2, 3 & 4 | Pins 1 & 2 closed |
| | closed | |
|---------+-------------------------+------------------------|
| 75iMHz | Open | Pins 1 & 2 closed |
|---------+-------------------------+------------------------|
| 80iMHz | Pins 1 & 2 closed | Pins 2 & 3, 4 & 5 |
| | | closed |
|---------+-------------------------+------------------------|
| 100iMHz | Pins 1 & 2, 3 & 4 | Pins 1 & 2 closed |
| | closed | |
|---------+-------------------------+------------------------|
| 120iMHz | Pins 1 & 2 closed | Pins 2 & 3, 4 & 5 |
| | | closed |
|---------+-------------------------+------------------------|
| 133iMHz | Pins 1 & 2, 3 & 4 | Pins 1 & 2 closed |
| | closed | |
|---------+-------------------------+------------------------|
| 160iMHz | Pins 1 & 2 closed | Pins 2 & 3, 4 & 5 |
| | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JC1 | JC2 | JC3 | JC4 | JC5 |
|-------------+--------------+--------+------+-------+-------|
| 80486SX | Open | Open | Open | 1 & 2 | 2 & 3 |
|-------------+--------------+--------+------+-------+-------|
| SL80486SX | Open | Open | Open | 1 & 2 | 2 & 3 |
|-------------+--------------+--------+------+-------+-------|
| AM486DX | Open | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| (SL)AM486DX | Open | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| 80486DX | Open | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| SL80486DX | Open | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| CX486DX2 | Open | Closed | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| IBM486DX2 | Open | Closed | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| SGS486DX2 | Open | Closed | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| TI486DX2 | Open | Closed | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| AM486DX2 | Open | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| ODP486DX2 | Open | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| 80486DX2 | Open | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| SL80486DX2 | Open | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| SL80486DX4 | Open | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| P24D | 1 & 2, 3 & 4 | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| P24T | 1 & 2, 3 & 4 | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| CX5X86 | 1 & 2, 3 & 4 | Open | Open | 2 & 3 | 1 & 2 |
|-------------+--------------+--------+------+-------+-------|
| (SL)AM X5 | 1 & 2, 3 & 4 | Open | Open | 2 & 3 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | R1 | R2 | R2 |
|-------------+-----------------+---------------+------------|
| 80486SX | Pins 1 – 10 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| SL80486SX | Pins 3 – 13 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| AM486DX | Pins 1 – 10 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| (SL)AM486DX | Pins 1 – 10 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| 80486DX | Pins 1 – 10 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| SL80486DX | Pins 3 – 13 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| CX486DX2 | Installed | Not installed | Not |
| | | | installed |
|-------------+-----------------+---------------+------------|
| IBM486DX2 | Installed | Not installed | Not |
| | | | installed |
|-------------+-----------------+---------------+------------|
| SGS486DX2 | Installed | Not installed | Not |
| | | | installed |
|-------------+-----------------+---------------+------------|
| TI486DX2 | Installed | Not installed | Not |
| | | | installed |
|-------------+-----------------+---------------+------------|
| AM486DX2 | Pins 1 – 10 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| ODP486DX2 | Pins 3 – 13 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| 80486DX2 | Pins 1 – 10 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| SL80486DX2 | Pins 3 – 13 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| SL80486DX4 | Pins 3 – 13 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| P24D | Pins 5 – 14 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| P24T | Pins 5 – 14 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| CX5X86 | Pins 3 – 13 | Not installed | Not |
| | closed | | installed |
|-------------+-----------------+---------------+------------|
| (SL)AM X5 | Pins 5 – 14 | Not installed | Not |
| | closed | | installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP1 | JV1 |
|-------------+------------+---------------------------------|
| » | 3v | Open | Open |
|----+--------+------------+---------------------------------|
| | 4v | Closed | Open |
|----+--------+------------+---------------------------------|
| | 5v | Open | Pins 1 & 2, 3 & 4, 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | JP3 | JP4 |
|------------------+--------------------+--------------------|
| 1 | Pins 2 & 3 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 3 | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+