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# MICRONICS COMPUTERS, INC.
M4PE (VER. 2A)
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 128/256/512KB
BIOS Phoenix
Dimensions 355mm x 305mm
I/O PS/2 mouse port, parallel port, serial ports (2), 32-bit PCI
Options slots (3), floppy drive interface, IDE interfaces (2)
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | J2 | External battery | W11 |
|-------------------+----------+------------------+----------|
| Speaker | J5 | Power LED & | W12 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| Parallel port | J8 | Reset switch | W15 |
|-------------------+----------+------------------+----------|
| Floppy drive | J9 | Turbo switch | W29 |
| interface | | | |
|-------------------+----------+------------------+----------|
| Serial port 2 | J10 | Turbo LED | W38 |
|-------------------+----------+------------------+----------|
| Serial port 1 | J11 | IDE interface | W39 |
| | | LED 1 | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | J21 | IDE interface | W46 |
| | | LED 2 | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | J22 | 32-bit PCI slots | PC1 - |
| | | | PC3 |
|-------------------+----------+------------------+----------|
| Chassis fan power | J102 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | IRQ jumper header disabled | J101 | Open |
|---+----------------------------------+--------+------------|
| | IRQ jumper header enabled | J101 | Closed |
|---+----------------------------------+--------+------------|
| » | Level 2 cache type select write | W1 | pins 2 & 3 |
| | back | | closed |
|---+----------------------------------+--------+------------|
| | Level 2 cache type select write | W1 | pins 1 & 2 |
| | through | | closed |
|---+----------------------------------+--------+------------|
| » | Cache type select write through | W4 | Open |
|---+----------------------------------+--------+------------|
| | Cache type select write back | W4 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | W6 | pins 2 & 3 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | W8 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | PS/2 mouse installed | W10 | Closed |
|---+----------------------------------+--------+------------|
| | PS/2 mouse not installed | W10 | Open |
|---+----------------------------------+--------+------------|
| » | DPU generates parity | W17 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CPU generates parity | W17 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | DPU forces parity error | W18 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | DPU does not force parity error | W18 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | W19 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Cache installed | W21 | Open |
|---+----------------------------------+--------+------------|
| | Cache not installed | W21 | Closed |
|---+----------------------------------+--------+------------|
| » | Level 2 cache wait state 0 wait | W25 | Open |
| | states | | |
|---+----------------------------------+--------+------------|
| | Level 2 cache wait state 1 wait | W25 | Closed |
| | state | | |
|---+----------------------------------+--------+------------|
| » | PCI IDE IRQ14 enabled | W35 | Closed |
|---+----------------------------------+--------+------------|
| | PCI IDE IRQ14 disabled | W35 | Open |
|---+----------------------------------+--------+------------|
| » | PCI IDE INT A disabled | W37 | Closed |
|---+----------------------------------+--------+------------|
| | PCI IDE INT A enabled | W37 | Open |
|---+----------------------------------+--------+------------|
| » | PCI IDE IRQ15 disabled | W38 | Closed |
|---+----------------------------------+--------+------------|
| | PCI IDE IRQ15 enabled | W38 | Open |
|---+----------------------------------+--------+------------|
| » | ISA IDE IRQ select IRQ15 | W42 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | ISA IDE IRQ select IRQ14 | W42 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | W50 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Parity check enabled | W60 | Closed |
|---+----------------------------------+--------+------------|
| | Parity check disabled | W60 | Open |
|------------------------------------------------------------|
| Note: The location of W60 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x | NONE | NONE |
| | | 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 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 8M x 36 | (1) 8M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 8M x 36 | (1) 8M x | (1) 2M x | (1) 2M 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 | TAG |
|----------+----------------+-----------------+--------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|----------+----------------+-----------------+--------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|----------+----------------+-----------------+--------------|
| 512KB | NONE | (4) 128K x 8 | (1) 32K x 8 |
|------------------------------------------------------------|
| Note: Bank 0 is factory installed and is not |
| configurable. If 512KB is used, the onboard cache is |
| disabled. The location of the TAG is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W5 | W22 | W23 | W51 |
|-----------+------------+-----------+-----------+-----------|
| 128KB | Open | Closed | Open | Open |
|-----------+------------+-----------+-----------+-----------|
| 256KB | Closed | Open | Closed | Open |
|-----------+------------+-----------+-----------+-----------|
| 512KB | Closed | Open | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE TAG CONFIGURATION |
|------------------------------------------------------------|
| Size | W24 | W26 |
|-------------------+--------------------+-------------------|
| 7-bit | Open | Closed |
|-------------------+--------------------+-------------------|
| 8-bit | Closed | Closed |
|-------------------+--------------------+-------------------|
| 9-bit | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | W2 | W3 | W33 |
|---------------+----------------------+--------+------------|
| 80486SX | pins 2 & 3 closed | Closed | Open |
|---------------+----------------------+--------+------------|
| 80486DX | pins 1 & 2, 3 & 4 | Closed | Open |
| | closed | | |
|---------------+----------------------+--------+------------|
| 80486DX2 | pins 1 & 2, 3 & 4 | Closed | Open |
| | closed | | |
|---------------+----------------------+--------+------------|
| 80486DX4 | pins 1 & 2, 3 & 4 | Closed | Open |
| | closed | | |
|---------------+----------------------+--------+------------|
| 80486DX4 (2x) | pins 1 & 2, 3 & 4 | Closed | pins 2 & 3 |
| | closed | | closed |
|---------------+----------------------+--------+------------|
| Pentium | pins 1 & 2, 3 & 4 | Open | Open |
| Overdrive | closed | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | W34 | W45 | W52 | W53 |
|-----------------+--------+--------+---------------+--------|
| Non SL-enhanced | Open | Open | pins 1 & 2 | Open |
| | | | closed | |
|-----------------+--------+--------+---------------+--------|
| SL-enhanced | Closed | Closed | pins 2 & 3 | Closed |
| | | | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | W16 | W20 |
|--------------------+-------------------+-------------------|
| 25MHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 33MHz | Closed | Open |
|--------------------+-------------------+-------------------|
| 50iMHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 66iMHz | Closed | Open |
|--------------------+-------------------+-------------------|
| 75iMHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 100iMHz | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CONFIGURATION |
|------------------------------------------------------------|
| DMA | W43 | W44 |
|-------------------+--------------------+-------------------|
| » | PIO transfer | Open | Open |
|---+---------------+--------------------+-------------------|
| | DMA 6 | pins 1 & 2 closed | pins 1 & 2 closed |
|---+---------------+--------------------+-------------------|
| | DMA 7 | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+