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# DYNA MICRO, INC.
MBA-486AI-33, 50
Processor 80486SX/80487SX/80486DX
Processor Speed 16/20/25/33/50MHz
Chip Set SIS
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI/Award
Dimensions 330mm x 218mm
I/O Options 32-bit external memory card slot
NPU Options 4167
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------------+----------+--------------+----------|
| External battery | BAT | Reset switch | RST |
|-----------------------+----------+--------------+----------|
| 32-bit external | CN1 | Speaker | SPK |
| memory card | | | |
|-----------------------+----------+--------------+----------|
| Power LED & keylock | KEY | Turbo switch | TSW |
|-----------------------+----------+--------------+----------|
| Turbo LED | LED | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| ยป | Power good signal detect from | JP1 | pins 1 & 2 |
| | power supply | | closed |
|---+----------------------------------+--------+------------|
| | Power good signal detect from | JP1 | pins 2 & 3 |
| | board | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|---------+--------------+-----------+-----------+-----------|
| 1MB | (4) 256K x 9 | NONE | NONE | NONE |
|---------+--------------+-----------+-----------+-----------|
| 2MB | (4) 256K x 9 | (4) 256K | NONE | NONE |
| | | x 9 | | |
|---------+--------------+-----------+-----------+-----------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|---------+--------------+-----------+-----------+-----------|
| 6MB | (4) 256K x 9 | (4) 256K | (4) 1M x | NONE |
| | | x 9 | 9 | |
|---------+--------------+-----------+-----------+-----------|
| 8MB | (4) 1M x 9 | (4) 1M x | NONE | NONE |
| | | 9 | | |
|---------+--------------+-----------+-----------+-----------|
| 10MB | (4) 256K x 9 | (4) 256K | (4) 1M x | (4) 1M x |
| | | x 9 | 9 | 9 |
|---------+--------------+-----------+-----------+-----------|
| 12MB | (4) 1M x 9 | (4) 1M x | (4) 1M x | NONE |
| | | 9 | 9 | |
|---------+--------------+-----------+-----------+-----------|
| 16MB | (4) 1M x 9 | (4) 1M x | (4) 1M x | (4) 1M x |
| | | 9 | 9 | 9 |
|---------+--------------+-----------+-----------+-----------|
| 16MB | (4) 4M x 9 | NONE | NONE | NONE |
|---------+--------------+-----------+-----------+-----------|
| 18MB | (4) 256K x 9 | (4) 256K | (4) 4M x | NONE |
| | | x 9 | 9 | |
|---------+--------------+-----------+-----------+-----------|
| 20MB | (4) 1M x 9 | (4) 4M x | NONE | NONE |
| | | 9 | | |
|---------+--------------+-----------+-----------+-----------|
| 24MB | (4) 1M x 9 | (4) 1M x | (4) 4M x | NONE |
| | | 9 | 9 | |
|---------+--------------+-----------+-----------+-----------|
| 32MB | (4) 4M x 9 | (4) 4M x | NONE | NONE |
| | | 9 | | |
|---------+--------------+-----------+-----------+-----------|
| 36MB | (4) 1M x 9 | (4) 4M x | (4) 4M x | NONE |
| | | 9 | 9 | |
|---------+--------------+-----------+-----------+-----------|
| 40MB | (4) 1M x 9 | (4) 1M x | (4) 4M x | (4) 4M x |
| | | 9 | 9 | 9 |
|---------+--------------+-----------+-----------+-----------|
| 48MB | (4) 4M x 9 | (4) 4M x | (4) 4M x | NONE |
| | | 9 | 9 | |
|---------+--------------+-----------+-----------+-----------|
| 64MB | (4) 4M x 9 | (4) 4M x | (4) 4M x | (4) 4M x |
| | | 9 | 9 | 9 |
|------------------------------------------------------------|
| Note:Banks 2 and 3 are used when a 32-bit external memory |
| card is installed at CN1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE RESISTOR CONFIGURATION |
|------------------------------------------------------------|
| Size | R1 | R2 | R3 |
|------------+---------------+---------------+---------------|
| 64KB | Installed | Not installed | Not installed |
|------------+---------------+---------------+---------------|
| 128KB | Not installed | Installed | Not installed |
|------------+---------------+---------------+---------------|
| 256KB | Not installed | Not installed | Installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 |
|---------+--------+--------+--------+-------+-------+-------|
| 80486SX | Off | Off | Off | Off | On | On |
|---------+--------+--------+--------+-------+-------+-------|
| 80487SX | Off | On | On | On | Off | On |
|---------+--------+--------+--------+-------+-------+-------|
| 80486DX | On | On | On | On | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP2 | JP3 |
|------------------+--------------------+--------------------|
| 16MHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 20MHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 25MHz | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 33MHz | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 50MHz | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+