TEXT View Source
# MICRONICS COMPUTERS, INC.
80486 ASIC SYSTEM BOARD
Processor 80486DX
Processor Speed 33MHz
Chip Set Micronics
Max. Onboard DRAM 64MB
Cache 64/128/256KB
BIOS Phoenix
Dimensions 330mm x 218mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------------+----------+--------------+----------|
| External battery | J13 | Turbo LED | W9 |
| connector | | | |
|-----------------------+----------+--------------+----------|
| Speaker | J30 | Reset switch | W10 |
|-----------------------+----------+--------------+----------|
| Keylock | J31 | Turbo switch | W11 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|---------------------------------+---------------+----------|
| » | Factory configured-do not | SW1/1 | Off |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Factory configured-do not | SW1/2 | Off |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Factory configured-do not | SW1/3 | Off |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Factory configured-do not | SW1/4 | Off |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Factory configured-do not | SW1/5 | Off |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Factory configured-do not | SW1/6 | Off |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Video BIOS cacheable | SW1/7 | Off |
|---+-----------------------------+---------------+----------|
| | Video BIOS not cacheable | SW1/7 | On |
|---+-----------------------------+---------------+----------|
| » | Factory configured-do not | SW1/8 | Off |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | 70ns DRAM select | SW2/6 | Off |
|---+-----------------------------+---------------+----------|
| | 80ns DRAM select | SW2/6 | On |
|---+-----------------------------+---------------+----------|
| | 64KB or 256KB cache select | SW2/7 | Off |
|---+-----------------------------+---------------+----------|
| | 128KB cache select | SW2/7 | On |
|---+-----------------------------+---------------+----------|
| | 64KB cache select | SW2/8 | Off |
|---+-----------------------------+---------------+----------|
| | 128KB or 256KB cache select | SW2/8 | 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 | W5 | W6 |
|--------------------+-------------------+-------------------|
| 128KB or 256KB | Closed | N/A |
|--------------------+-------------------+-------------------|
| 64KB | Open | N/A |
|--------------------+-------------------+-------------------|
| 256KB | N/A | Closed |
|--------------------+-------------------+-------------------|
| 64KB or 128KB | N/A | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+---------------+-------------+-----------+-----------|
| 1MB | (4) 256KB x 9 | NONE | NONE | NONE |
|------+---------------+-------------+-----------+-----------|
| 2MB | (4) 256KB x 9 | (4) 256KB x | NONE | NONE |
| | | 9 | | |
|------+---------------+-------------+-----------+-----------|
| 3MB | (4) 256KB x 9 | (4) 256KB x | (4) 256KB | NONE |
| | | 9 | x 9 | |
|------+---------------+-------------+-----------+-----------|
| 4MB | (4) 256KB x 9 | (4) 256KB x | (4) 256KB | (4) 256KB |
| | | 9 | x 9 | x 9 |
|------+---------------+-------------+-----------+-----------|
| 4MB | (4) 1MB X 9 | NONE | NONE | NONE |
|------+---------------+-------------+-----------+-----------|
| 5MB | (4) 256KB x 9 | (4) 1MB x 9 | NONE | NONE |
|------+---------------+-------------+-----------+-----------|
| 6MB | (4) 256KB x 9 | (4) 256KB x | (4) 1MB x | NONE |
| | | 9 | 9 | |
|------+---------------+-------------+-----------+-----------|
| 7MB | (4) 256KB x 9 | (4) 256KB x | (4) 256KB | (4) 1MB x |
| | | 9 | x 9 | 9 |
|------+---------------+-------------+-----------+-----------|
| 8MB | (4) 1MB x 9 | (4) 1MB x 9 | NONE | NONE |
|------+---------------+-------------+-----------+-----------|
| 9MB | (4) 256KB x 9 | (4) 1MB x 9 | (4) 1MB x | NONE |
| | | | 9 | |
|------+---------------+-------------+-----------+-----------|
| 10MB | (4) 256KB x 9 | (4) 256KB x | (4) 1MB x | (4) 1MB x |
| | | 9 | 9 | 9 |
|------+---------------+-------------+-----------+-----------|
| 12MB | (4) 1MB x 9 | (4) 1MB x 9 | (4) 1MB x | NONE |
| | | | 9 | |
|------+---------------+-------------+-----------+-----------|
| 13MB | (4) 256KB x 9 | (4) 1MB x 9 | (4) 1MB x | (4) 1MB x |
| | | | 9 | 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CONTINUED) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1MB x 9 | (4) 1MB x 9 | (4) 1MB x | (4) 1MB x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 4MB x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (4) 1MB x 9 | (4) 4MB x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (4) 1MB x 9 | (4) 1MB x 9 | (4) 4MB x | NONE |
| | | | 9 | |
|------+-------------+-------------+------------+------------|
| 28MB | (4) 1MB x 9 | (4) 1MB x 9 | (4) 1MB x | (4) 4MB x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 32MB | (4) 4MB x 9 | (4) 4MB x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 36MB | (4) 1MB x 9 | (4) 4MB x 9 | (4) 4MB x | NONE |
| | | | 9 | |
|------+-------------+-------------+------------+------------|
| 40MB | (4) 1MB x 9 | (4) 1MB x 9 | (4) 4MB x | (4) 4MB x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 48MB | (4) 4MB x 9 | (4) 4MB x 9 | (4) 4MB x | NONE |
| | | | 9 | |
|------+-------------+-------------+------------+------------|
| 52MB | (4) 1MB x 9 | (4) 4MB x 9 | (4) 4MB x | (4) 4MB x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 64MB | (4) 4MB x 9 | (4) 4MB x 9 | (4) 4MB x | (4) 4MB x |
| | | | 9 | 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW2/1 | SW2/2 | SW2/3 | SW2/4 | SW2/5 |
|---------+----------+---------+---------+---------+---------|
| 1MB | On | On | On | On | On |
|---------+----------+---------+---------+---------+---------|
| 2MB | Off | On | On | On | On |
|---------+----------+---------+---------+---------+---------|
| 3MB | On | Off | On | On | On |
|---------+----------+---------+---------+---------+---------|
| 4MB | Off | Off | On | On | On |
|---------+----------+---------+---------+---------+---------|
| 4MB | On | On | Off | On | On |
|---------+----------+---------+---------+---------+---------|
| 5MB | On | On | Off | On | On |
|---------+----------+---------+---------+---------+---------|
| 6MB | On | Off | On | Off | On |
|---------+----------+---------+---------+---------+---------|
| 7MB | Off | On | On | Off | On |
|---------+----------+---------+---------+---------+---------|
| 8MB | Off | On | Off | On | On |
|---------+----------+---------+---------+---------+---------|
| 9MB | On | Off | Off | Off | On |
|---------+----------+---------+---------+---------+---------|
| 10MB | Off | Off | On | Off | On |
|---------+----------+---------+---------+---------+---------|
| 12MB | On | Off | Off | On | On |
|---------+----------+---------+---------+---------+---------|
| 13MB | Off | Off | Off | Off | On |
|---------+----------+---------+---------+---------+---------|
| 16MB | Off | Off | Off | On | On |
|---------+----------+---------+---------+---------+---------|
| 16MB | On | On | Off | On | Off |
|---------+----------+---------+---------+---------+---------|
| 20MB | On | On | Off | Off | Off |
|---------+----------+---------+---------+---------+---------|
| 24MB | On | Off | On | Off | Off |
|---------+----------+---------+---------+---------+---------|
| 28MB | Off | On | On | Off | Off |
|---------+----------+---------+---------+---------+---------|
| 32MB | Off | On | Off | On | Off |
|---------+----------+---------+---------+---------+---------|
| 36MB | On | Off | Off | Off | Off |
|---------+----------+---------+---------+---------+---------|
| 40MB | Off | Off | On | Off | Off |
|---------+----------+---------+---------+---------+---------|
| 48MB | On | Off | Off | On | Off |
|---------+----------+---------+---------+---------+---------|
| 52MB | Off | Off | Off | Off | Off |
|---------+----------+---------+---------+---------+---------|
| 64MB | Off | Off | Off | On | Off |
+------------------------------------------------------------+