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# ARNOS INSTRUMENTS & COMPUTER SYSTEMS COMPANY, INC.
486-25C/33C
Processor 80486DX
Processor Speed 25/33MHz
Chip Set None
Max. Onboard DRAM 32MB
Cache 128KB
BIOS Phoenix
Dimensions 355mm x 304mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | X4 | Status display | X15 |
|------------------+----------+-------------------+----------|
| Turbo switch | X12 | Reset switch | X16 |
|------------------+----------+-------------------+----------|
| Speaker | X13 | Power LED & | X17 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Turbo LED | X14 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Factory configured - do | S1 | pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Battery installed < 5VDC | S2 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | Battery installed > 5VDC | S2 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | CPU speed select | S3 | pins 2 & 3 |
| | switchable at keyboard | | closed |
|---+---------------------------+---------------+------------|
| | CPU speed select | S3 | pins 1 & 2 |
| | switchable at turbo | | closed |
| | switch | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/1 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | NPU disabled | SW1/2 | Off |
|---+---------------------------+---------------+------------|
| | NPU enabled | SW1/2 | On |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/3 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Monitor type select | SW1/4 | Off |
| | monochrome | | |
|---+---------------------------+---------------+------------|
| | Monitor type select color | SW1/4 | On |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP1 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP2 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP3 | Off |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | TP4 | Off |
| | not alter | | |
|------------------------------------------------------------|
| Note: The location of S1 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|----------+-------------+-----------+-----------+-----------|
| 4MB 2 | (4) 1M x 9 | NONE | NONE | NONE |
|----------+-------------+-----------+-----------+-----------|
| 8MB 2 | (4) 1M x 9 | (4) 1M x | NONE | NONE |
| | | 9 | | |
|----------+-------------+-----------+-----------+-----------|
| 12MB 2 | (4) 1M x 9 | (4) 1M x | (4) 1M x | NONE |
| | | 9 | 9 | |
|----------+-------------+-----------+-----------+-----------|
| 16MB 1 | (4) 1M x 9 | (4) 1M x | (4) 1M x | (4) 1M x |
| | | 9 | 9 | 9 |
|----------+-------------+-----------+-----------+-----------|
| 16MB 2 | (4) 1M x 9 | (4) 1M x | (4) 1M x | (4) 1M x |
| | | 9 | 9 | 9 |
|----------+-------------+-----------+-----------+-----------|
| 16MB 1 | (4) 4M x 9 | NONE | NONE | NONE |
|----------+-------------+-----------+-----------+-----------|
| 16MB 2 | (4) 4M x 9 | NONE | NONE | NONE |
|----------+-------------+-----------+-----------+-----------|
| 20MB 2 | (4) 4M x 9 | (4) 1M x | NONE | NONE |
| | | 9 | | |
|----------+-------------+-----------+-----------+-----------|
| 24MB 2 | (4) 4M x 9 | (4) 1M x | (4) 1M x | NONE |
| | | 9 | 9 | |
|----------+-------------+-----------+-----------+-----------|
| 28MB 2 | (4) 4M x 9 | (4) 1M x | (4) 1M x | (4) 1M x |
| | | 9 | 9 | 9 |
|----------+-------------+-----------+-----------+-----------|
| 32MB 1 | (4) 4M x 9 | (4) 4M x | NONE | NONE |
| | | 9 | | |
|------------------------------------------------------------|
| Note 1: These memory configurations do not utilize 256KB |
| remapping. |
| |
| Note 2: These memory configurations utilize 256KB memory |
| remapping. |
| |
| Due to remapping, system memory count on boot-up will |
| reflect 256KB less than actual. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/5 | SW1/6 | SW1/ 7 | SW1/8 |
|--------------+-----------+----------+-----------+----------|
| 4MB 2 | On | On | On | On |
|--------------+-----------+----------+-----------+----------|
| 8MB 2 | On | On | On | Off |
|--------------+-----------+----------+-----------+----------|
| 12MB 2 | On | On | Off | On |
|--------------+-----------+----------+-----------+----------|
| 16MB 1 | On | On | Off | Off |
|--------------+-----------+----------+-----------+----------|
| 16MB 2 | On | Off | On | Off |
|--------------+-----------+----------+-----------+----------|
| 16MB 1 | On | Off | Off | On |
|--------------+-----------+----------+-----------+----------|
| 16MB 2 | On | Off | Off | Off |
|--------------+-----------+----------+-----------+----------|
| 20MB 2 | Off | On | On | On |
|--------------+-----------+----------+-----------+----------|
| 24MB 2 | Off | On | Off | On |
|--------------+-----------+----------+-----------+----------|
| 28MB 2 | Off | On | Off | Off |
|--------------+-----------+----------+-----------+----------|
| 32MB 1 | Off | Off | On | On |
|------------------------------------------------------------|
| Note 1: These memory configurations do not utilize 256KB |
| remapping. |
| |
| Note 2: These memory configurations utilize 256KB-memory |
| remapping. |
| |
| Due to remapping, system memory count on boot-up will |
| reflect 256KB less than actual. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 128KB | (16) 8K x 8 | (2) 8K x 8 |
+------------------------------------------------------------+