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# JPN CORPORATION
MB-486 DX-33 UM
Processor 80486SX/80487SX/80486DX
Processor Speed 33MHz
Chip Set UMC
Max. Onboard DRAM 40MB
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Power LED & | J1 | Reset switch | J4 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J2 | Turbo LED | J5 |
|-------------------+----------+------------------+----------|
| Turbo switch | J3 | External battery | J6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| » | Monitor type select CGA | W18 | Closed |
|---+------------------------------------+--------+----------|
| | Monitor type select | W18 | Open |
| | monochrome/EGA/VGA | | |
|---+------------------------------------+--------+----------|
| » | Battery select internal | W22 | Closed |
|---+------------------------------------+--------+----------|
| | Battery select external | W22 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|----------+------------+----------+--------------+----------|
| 1MB 1 | (4) 256K x | NONE | NONE | NONE |
| | 9 | | | |
|----------+------------+----------+--------------+----------|
| 1MB 2 | NONE | NONE | (1) 256K x | NONE |
| | | | 36 | |
|----------+------------+----------+--------------+----------|
| 2MB 1 | (4) 256K x | (4) 256K | NONE | NONE |
| | 9 | x 9 | | |
|----------+------------+----------+--------------+----------|
| 2MB 2 | NONE | NONE | (1) 256K x | (1) 256K |
| | | | 36 | x 36 |
|----------+------------+----------+--------------+----------|
| 3MB 1 | (4) 256K x | (4) 256K | (1) 256K x | NONE |
| | 9 | x 9 | 36 | |
|----------+------------+----------+--------------+----------|
| 3MB 2 | (4) 256K x | NONE | (1) 256K x | (1) 256K |
| | 9 | | 36 | x 36 |
|----------+------------+----------+--------------+----------|
| 4MB 1 | (4) 256K x | (4) 256K | (1) 256K x | (1) 256K |
| | 9 | x 9 | 36 | x 36 |
|----------+------------+----------+--------------+----------|
| 4MB 2 | (4) 256K x | (4) 256K | (1) 256K x | (1) 256K |
| | 9 | x 9 | 36 | x 36 |
|----------+------------+----------+--------------+----------|
| 4MB 1 | (4) 1M x 9 | NONE | NONE | NONE |
|----------+------------+----------+--------------+----------|
| 4MB 2 | NONE | NONE | (1) 1M x 36 | NONE |
|----------+------------+----------+--------------+----------|
| 5MB 1 | (4) 256K x | (4) 1M x | NONE | NONE |
| | 9 | 9 | | |
|----------+------------+----------+--------------+----------|
| 5MB 2 | NONE | NONE | (1) 256K x | (1) 1M x |
| | | | 36 | 36 |
|----------+------------+----------+--------------+----------|
| 6MB 1 | (4) 256K x | (4) 256K | (1) 1M x 36 | NONE |
| | 9 | x 9 | | |
|----------+------------+----------+--------------+----------|
| 6MB 2 | (4) 1M x 9 | NONE | (1) 256K x | (1) 256K |
| | | | 36 | x 36 |
|----------+------------+----------+--------------+----------|
| 8MB 1 | (4) 1M x 9 | (4) 1M x | NONE | NONE |
| | | 9 | | |
|----------+------------+----------+--------------+----------|
| 8MB 2 | NONE | NONE | (1) 1M x 36 | (1) 1M x |
| | | | | 36 |
|----------+------------+----------+--------------+----------|
| 9MB 1 | (4) 256K x | (4) 1M x | (1) 1M x 36 | NONE |
| | 9 | 9 | | |
|----------+------------+----------+--------------+----------|
| 9MB 2 | (4) 1M x 9 | NONE | (1) 256K x | (1) 1M x |
| | | | 36 | 36 |
|----------+------------+----------+--------------+----------|
| 10MB 1 | (4) 256K x | (4) 256K | (1) 1M x 36 | (1) 1M x |
| | 9 | x 9 | | 36 |
|----------+------------+----------+--------------+----------|
| 10MB 2 | (4) 1M x 9 | (4) 1M x | (1) 256K x | (1) 256K |
| | | 9 | 36 | x 36 |
|----------+------------+----------+--------------+----------|
| 12MB 1 | (4) 1M x 9 | (4) 1M x | (1) 1M x 36 | NONE |
| | | 9 | | |
|----------+------------+----------+--------------+----------|
| 12MB 2 | (4) 1M x 9 | NONE | (1) 1M x 36 | (1) 1M x |
| | | | | 36 |
|----------+------------+----------+--------------+----------|
| 16MB 1 | (4) 1M x 9 | (4) 1M x | (1) 1M x 36 | (1) 1M x |
| | | 9 | | 36 |
|----------+------------+----------+--------------+----------|
| 16MB 2 | (4) 1M x 9 | (4) 1M x | (1) 1M x 36 | (1) 1M x |
| | | 9 | | 36 |
|----------+------------+----------+--------------+----------|
| 16MB 1 | (4) 4M x 9 | NONE | NONE | NONE |
|----------+------------+----------+--------------+----------|
| 16MB 2 | NONE | NONE | (1) 4M x 36 | NONE |
|----------+------------+----------+--------------+----------|
| 20MB 1 | (4) 1M x 9 | (4) 4M x | NONE | NONE |
| | | 9 | | |
|----------+------------+----------+--------------+----------|
| 20MB 2 | NONE | NONE | (1) 1M x 36 | (1) 4M x |
| | | | | 36 |
|----------+------------+----------+--------------+----------|
| 24MB 1 | (4) 1M x 9 | (4) 1M x | (1) 4M x 36 | NONE |
| | | 9 | | |
|----------+------------+----------+--------------+----------|
| 24MB 2 | (4) 4M x 9 | NONE | (1) 1M x 36 | (1) 1M x |
| | | | | 36 |
|----------+------------+----------+--------------+----------|
| 32MB 1 | (4) 4M x 9 | (4) 4M x | NONE | NONE |
| | | 9 | | |
|----------+------------+----------+--------------+----------|
| 32MB 2 | NONE | NONE | (1) 4M x 36 | (1) 4M x |
| | | | | 36 |
|----------+------------+----------+--------------+----------|
| 40MB 1 | (4) 1M x 9 | (4) 1M x | (1) 4M x 36 | (1) 4M x |
| | | 9 | | 36 |
|----------+------------+----------+--------------+----------|
| 40MB 2 | (4) 4M x 9 | (4) 4M x | (1) 1M x 36 | (1) 1M x |
| | | 9 | | 36 |
|------------------------------------------------------------|
| Note 1 :On jumpers W12, W13, W15, and W16 - pins 1 & 2 |
| should be in the closed position. |
| |
| Note 2 :On jumpers W12, W13, W15, and W16 - pins 2 & 3 |
| should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Dirty Bit | TAG (U11) |
| | | | (U10) | |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 16K x | (1) 8K x 8 |
| | | | 8 | |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 16K x | (1) 8K x 8 |
| | | | 8 | |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 16K x | (1) 32K x |
| | | 8 | 8 | 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W2 | W3 | W4 | W5 | W6 | W7 | W8 | W9 |
|------+------+------+-----+-----+------+------+------+------|
| 64KB |1 & 2 |1 & 2 |Open |1 & 2| Open | Open | Open | Open |
|------+------+------+-----+-----+------+------+------+------|
|128KB |2 & 3 |1 & 2 |1 & 2|2 & 3|Closed| Open | Open | Open |
|------+------+------+-----+-----+------+------+------+------|
|256KB |2 & 3 |2 & 3 |2 & 3|1 & 2|Closed|Closed|Closed|Closed|
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | W10 | W11 |
|----------+-------------------+-----------------------------|
| 80486SX | Open | pins 2 & 3 closed |
|----------+-------------------+-----------------------------|
| 80487SX | pins 2 & 3 closed | pins 1 & 2 and 3 & 4 closed |
|----------+-------------------+-----------------------------|
| 80486DX | pins 1 & 2 closed | pins 1 & 2 and 3 & 4 closed |
+------------------------------------------------------------+