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# MYLEX CORPORATION
MB386
Processor 80386DX
Processor speed 16/20MHz
Chip Set TI
Max. Onboard DRAM 4MB
BIOS Mylex
Cache 64KB
Dimensions 330mm x 305mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+-----------+-----------------+-----------|
| Reset switch | J2 | Battery | J21 |
|------------------+-----------+-----------------+-----------|
| Speaker | J19 | Turbo LED | J39 |
|------------------+-----------+-----------------+-----------|
| Keylock | J20 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Switch | Position |
|----------------------------------------+--------+----------|
| » | Factory configured - do not alter | J6 | N/A |
|---+------------------------------------+--------+----------|
| » | EGA BIOS disabled | SW1/5 | Off |
|---+------------------------------------+--------+----------|
| | EGA BIOS enabled | SW1/5 | On |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | SW1/6 | Off |
|---+------------------------------------+--------+----------|
| » | CPU speed select 16MHz (cache | SW1/7 | Off |
| | enabled) | | |
|---+------------------------------------+--------+----------|
| | CPU speed select 8MHz (cache | SW1/7 | On |
| | disabled) | | |
|---+------------------------------------+--------+----------|
| » | Monitor type select color | SW1/8 | On |
|---+------------------------------------+--------+----------|
| | Monitor type select monochrome | SW1/8 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 1MB | (36) 41256 |
|----------------------------+-------------------------------|
| 4MB | (36) 411000 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| DRAM< 1MB | DRAM> 1MB | Cacheable DRAM < | SW1/1 | SW1/2 |
| | | 1MB | | |
|-----------+-----------+--------------------+-------+-------|
| 256KB | 0KB | 256KB | On | On |
|-----------+-----------+--------------------+-------+-------|
| 256KB | 0KB | 512KB | On | Off |
|-----------+-----------+--------------------+-------+-------|
| 256KB | 0KB | 640KB | On | Off |
|-----------+-----------+--------------------+-------+-------|
| 512KB | 512KB | 640KB | Off | On |
|-----------+-----------+--------------------+-------+-------|
| 640KB | 0KB | 640KB | Off | On |
|-----------+-----------+--------------------+-------+-------|
| 640KB | 348KB | 640KB | Off | On |
|-----------+-----------+--------------------+-------+-------|
| 512KB | 3MB | 512KB | Off | Off |
|-----------+-----------+--------------------+-------+-------|
| 512KB | 3.5MB | 512KB | Off | Off |
|-----------+-----------+--------------------+-------+-------|
| 640KB | 3MB | 640KB | Off | Off |
|-----------+-----------+--------------------+-------+-------|
| 640KB | 3.348MB | 640KB | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| DRAM< 1MB | DRAM> 1MB | Cacheable DRAM < | SW1/3 | SW1/4 |
| | | 1MB | | |
|-----------+-----------+--------------------+-------+-------|
| 256KB | 0KB | 256KB | On | Off |
|-----------+-----------+--------------------+-------+-------|
| 256KB | 0KB | 512KB | On | Off |
|-----------+-----------+--------------------+-------+-------|
| 256KB | 0KB | 640KB | Off | Off |
|-----------+-----------+--------------------+-------+-------|
| 512KB | 512KB | 640KB | On | Off |
|-----------+-----------+--------------------+-------+-------|
| 640KB | 0KB | 640KB | Off | On |
|-----------+-----------+--------------------+-------+-------|
| 640KB | 348KB | 640KB | Off | Off |
|-----------+-----------+--------------------+-------+-------|
| 512KB | 3MB | 512KB | On | On |
|-----------+-----------+--------------------+-------+-------|
| 512KB | 3.5MB | 512KB | On | Off |
|-----------+-----------+--------------------+-------+-------|
| 640KB | 3MB | 640KB | Off | On |
|-----------+-----------+--------------------+-------+-------|
| 640KB | 3.348MB | 640KB | Off | Off |
+------------------------------------------------------------+