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# MICRONICS COMPUTERS, INC.
80486-25 ISA
Processor 80486DX
Processor Speed 25MHz
Chip Set Micronics
Max. Onboard DRAM 16MB
Cache 64/128/256KB
BIOS Phoenix
Dimensions 350mm x 304mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | J2 | Reset switch | W4 |
|---------------------+----------+----------------+----------|
| Speaker | J22 | Turbo LED | W5 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J23 | Turbo switch | W6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Internal cache enabled | SW1/1 | On |
|---+---------------------------+---------------+------------|
| | Internal cache disabled | SW1/1 | Off |
|---+---------------------------+---------------+------------|
| » | BIOS select onboard | SW1/2 | Off |
|---+---------------------------+---------------+------------|
| | BIOS select external | SW1/2 | On |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/3 | On |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Secondary cache enabled | SW1/4 | On |
|---+---------------------------+---------------+------------|
| | Secondary cache disabled | SW1/4 | Off |
|---+---------------------------+---------------+------------|
| » | Video BIOS shadowing | SW1/5 | Off |
| | disabled | | |
|---+---------------------------+---------------+------------|
| | Video BIOS shadowing | SW1/5 | On |
| | enabled | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/6 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | SW1/7 | On |
|---+---------------------------+---------------+------------|
| | Monitor type select | SW1/7 | Off |
| | monochrome | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/8 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW2/5 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Address range 14MB to | SW2/6 | Off |
| | 15MB cacheable | | |
|---+---------------------------+---------------+------------|
| | Address range 13MB to | SW2/6 | On |
| | 15MB Non-cacheable | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | W1 | pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | W2 | pins 2 & 3 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Video BIOS caching | W3 | Open |
| | enabled | | |
|---+---------------------------+---------------+------------|
| | Video BIOS caching | W3 | Closed |
| | disabled | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (4) 256K x | NONE | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (4) 256K x | (4) 256K x | NONE | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (4) 256K x | (4) 256K x | (4) 256K x | NONE |
| | 9 | 9 | 9 | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 256K x | (4) 256K x | (4) 256K x | (4) 256K x |
| | 9 | 9 | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (4) 256K x | (4) 1M x 9 | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 6MB | (4) 256K x | (4) 256K x | (4) 1M x 9 | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 7MB | (4) 256K x | (4) 256K x | (4) 256K x | (4) 1M x 9 |
| | 9 | 9 | 9 | |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 9MB | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 256K x | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 13MB | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW2/1 | SW2/2 | SW2/3 | SW2/4 |
|-----------+------------+-----------+-----------+-----------|
| 1MB | On | On | On | On |
|-----------+------------+-----------+-----------+-----------|
| 2MB | Off | On | On | On |
|-----------+------------+-----------+-----------+-----------|
| 3MB | On | Off | On | On |
|-----------+------------+-----------+-----------+-----------|
| 4MB | Off | Off | On | On |
|-----------+------------+-----------+-----------+-----------|
| 4MB | On | On | Off | On |
|-----------+------------+-----------+-----------+-----------|
| 5MB | On | On | Off | Off |
|-----------+------------+-----------+-----------+-----------|
| 6MB | On | Off | On | Off |
|-----------+------------+-----------+-----------+-----------|
| 7MB | Off | On | On | Off |
|-----------+------------+-----------+-----------+-----------|
| 8MB | Off | On | Off | On |
|-----------+------------+-----------+-----------+-----------|
| 9MB | On | Off | Off | Off |
|-----------+------------+-----------+-----------+-----------|
| 10MB | Off | Off | On | Off |
|-----------+------------+-----------+-----------+-----------|
| 12MB | On | Off | Off | On |
|-----------+------------+-----------+-----------+-----------|
| 13MB | Off | Off | Off | Off |
|-----------+------------+-----------+-----------+-----------|
| 16MB | Off | Off | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 |
|------------------+--------------------+--------------------|
| 128KB | (4) 32K x 8 | NONE |
|------------------+--------------------+--------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | SW2/7 | SW2/8 | W8 | W9 |
|-------+-------+-------+------------------+-----------------|
| 64KB | Off | Off | pins 1 & 2 | pins 1 & 2 |
| | | | closed | closed |
|-------+-------+-------+------------------+-----------------|
| 128KB | On | On | pins 2 & 3 | pins 1 & 2 |
| | | | closed | closed |
|-------+-------+-------+------------------+-----------------|
| 256KB | Off | On | pins 2 & 3 | pins 2 & 3 |
| | | | closed | closed |
+------------------------------------------------------------+