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# MICRONICS COMPUTERS, INC.
M4PI
Processor 80486SX/SL80486SX/80486DX/SL80486DX/80486DX2/SL80486DX2/
80486DX4/Pentium Overdrive
Processor 25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set Intel
Max. 128MB
Onboard
DRAM
Cache 128/256KB
BIOS Phoenix
Dimensions 330mm x 218mm
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 |
|-------------------+----------+------------------+----------|
| Auxiliary | J8 | IDE interface | J54 |
| keyboard | | LED | |
| connector | | | |
|-------------------+----------+------------------+----------|
| Serial port 1 | J18 | Reset switch | J55 |
|-------------------+----------+------------------+----------|
| Serial port 2 | J21 | Speaker | J56 |
|-------------------+----------+------------------+----------|
| Parallel port | J22 | Power LED & | J57 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| IDE interface | J38 | IDE interface | J81 |
| (ISA) | | (PCI) | |
|-------------------+----------+------------------+----------|
| Floppy drive | J39 | 32-bit PCI slots | PC1 - |
| interface | | | PC3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | PCI IDE IRQ select IRQ14 | J19 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | PCI IDE IRQ select IRQ15 | J19 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | J20 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | J66 | Open |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | J67 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Parallel port ECP mode | J76 | Open |
| | enabled | | |
|---+---------------------------+---------------+------------|
| | Parallel port ECP mode | J76 | Closed |
| | disabled | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | J80 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Flash BIOS write protect | SW1/4 | On |
| | disabled | | |
|---+---------------------------+---------------+------------|
| | Flash BIOS write protect | SW1/4 | Off |
| | enabled | | |
|---+---------------------------+---------------+------------|
| » | PCI card installed | SW1/5 | On |
|---+---------------------------+---------------+------------|
| | PCI card not installed | SW1/5 | Off |
|---+---------------------------+---------------+------------|
| » | On board mouse enabled | SW1/8 | On |
| | (uses IRQ12) | | |
|---+---------------------------+---------------+------------|
| | On board mouse disabled | SW1/8 | Off |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | W1 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | W5 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Parallel port IRQ select | W8 | pins 2 & 3 |
| | IRQ5 | | closed |
|---+---------------------------+---------------+------------|
| | Parallel port IRQ select | W8 | pins 1 & 2 |
| | IRQ7 | | closed |
|---+---------------------------+---------------+------------|
| » | Flash BIOS mode select | W10 | pins 2 & 3 |
| | normal | | closed |
|---+---------------------------+---------------+------------|
| | Flash BIOS mode select | W10 | pins 1 & 2 |
| | recovery | | closed |
|---+---------------------------+---------------+------------|
| » | PCI IDE chip enabled | W12 | Closed |
|---+---------------------------+---------------+------------|
| | PCI IDE chip disabled | W12 | Open |
|---+---------------------------+---------------+------------|
| » | ISA IDE IRQ select IRQ14 | W13 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | ISA IDE IRQ select IRQ15 | W13 | pins 2 & 3 |
| | | | closed |
|------------------------------------------------------------|
| Note: The location of J19 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 2M x 36 | (1) 2M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x 36 | (1) 8M x | (1) 8M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 72MB | (1) 8M x 36 | (1) 8M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 80MB | (1) 2M x 36 | (1) 2M x 36 | (1) 8M x | (1) 8M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 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) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 128KB | (4) 32K x 8 | NONE |
|------------------+--------------------+--------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J52 | J58 |
|-------------------+--------------------+-------------------|
| 128KB | pins 2 & 3 closed | Open |
|-------------------+--------------------+-------------------|
| 256KB | pins 1 & 2 closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | j59 | j71 | j73 | j74 |
|------------+--------+--------------+--------------+--------|
| 80486SX | Closed | 2 & 3 | 2 & 3 | Open |
|------------+--------+--------------+--------------+--------|
| SL80486SX | Closed | 2 & 3 | 1 & 2, 3 & 4 | Closed |
|------------+--------+--------------+--------------+--------|
| 80486DX | Closed | 1 & 2, 3 & 4 | 2 & 3 | Open |
|------------+--------+--------------+--------------+--------|
| SL80486DX | Closed | 1 & 2, 3 & 4 | 1 & 2, 3 & 4 | Closed |
|------------+--------+--------------+--------------+--------|
| 80486DX2 | Closed | 1 & 2, 3 & 4 | 2 & 3 | Open |
|------------+--------+--------------+--------------+--------|
| SL80486DX2 | Closed | 1 & 2, 3 & 4 | 1 & 2, 3 & 4 | Closed |
|------------+--------+--------------+--------------+--------|
| 80486DX4 | Closed | 1 & 2, 3 & 4 | 1 & 2, 3 & 4 | Closed |
|------------+--------+--------------+--------------+--------|
| P24T | Open | 1 & 2, 3 & 4 | 1 & 2, 3 & 4 | Closed |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | SW1/6 | SW1/7 |
|--------------------+-------------------+-------------------|
| 25MHz | On | On |
|--------------------+-------------------+-------------------|
| 33MHz | Off | On |
|--------------------+-------------------+-------------------|
| 50iMHz | On | Off |
|--------------------+-------------------+-------------------|
| 66iMHz | Off | On |
|--------------------+-------------------+-------------------|
| 75iMHz | On | On |
|--------------------+-------------------+-------------------|
| 100iMHz | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CONFIGURATION |
|------------------------------------------------------------|
| DMA | W6 | W7 |
|------------------+--------------------+--------------------|
| DMA1 | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| DMA3 | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI IRQ CONFIGURATION |
|------------------------------------------------------------|
| IRQ | SW1/1 | SW1/2 | SW/3 |
|---------------+---------------+--------------+-------------|
| IRQ5 | On | On | Off |
|---------------+---------------+--------------+-------------|
| IRQ11 | On | Off | On |
|---------------+---------------+--------------+-------------|
| IRQ15 | Off | On | On |
+------------------------------------------------------------+