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# MAGITRONICS
A-B341 386-40 MAINBOARD
Processor 80386DX
Processor Speed 33/40MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
Cache 32/64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit external memory card slot
NPU Options 80387/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------------+----------+--------------+----------|
| 32-bit external | CN1 | Turbo LED | JP4 |
| memory card | | | |
|-----------------------+----------+--------------+----------|
| External battery | J10 | Reset switch | SW1 |
|-----------------------+----------+--------------+----------|
| Power LED & keylock | J23 | Turbo switch | SW2 |
|-----------------------+----------+--------------+----------|
| Speaker | J24 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | Monitor type select color | JP1 | Closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | JP1 | Open |
|---+--------------------------------+--------+--------------|
| » | Battery select internal | JP2 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | JP2 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Battery type select external | JP2 | Open |
|---+--------------------------------+--------+--------------|
| » | Bus speed select OSCIN/8 | JP3 | Closed |
|---+--------------------------------+--------+--------------|
| | Bus speed select OSCIN/6 | JP3 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 32KB | (4) 8K x 8 | NONE |
|------------------+--------------------+--------------------|
| 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 | JP5 | JP6 | JP7 | JP8 | JP9 | JP10 |
|--------+--------+--------+--------+--------+-------+-------|
| 32KB | 1 & 2 | 1 & 2 | 1 & 2 | Open | 2 & 3 | 2 & 3 |
|--------+--------+--------+--------+--------+-------+-------|
| 64KB | 2 & 3 | 1 & 2 | 1 & 2 | Open | 2 & 3 | 1 & 2 |
|--------+--------+--------+--------+--------+-------+-------|
| 128KB | 2 & 3 | 1 & 2 | 2 & 3 | Closed | 2 & 3 | 1 & 2 |
|--------+--------+--------+--------+--------+-------+-------|
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | Closed | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+