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# MICROMEDIA TECHNOLOGIES, INC.
486-VLA
Processor 80486SX/80486DX/80486DX2
Processor Speed 25/33/40/50(internal)/50/66(internal)MHz
Chip Set ALI
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI
Dimensions 230mm x 218mm
I/O Options 32-bit VESA local bus slots (3)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+----------+-----------------------+----------|
| Speaker | J1 | External battery | J6 |
|--------------+----------+-----------------------+----------|
| Power LED & | J2 | 32-bit VESA Local bus | S1 |
| keylock | | slot | |
|--------------+----------+-----------------------+----------|
| Reset switch | J3 | 32-bit VESA Local bus | S2 |
| | | slot | |
|--------------+----------+-----------------------+----------|
| Turbo LED | J4 | 32-bit VESA Local bus | S3 |
| | | slot | |
|--------------+----------+-----------------------+----------|
| Turbo switch | J5 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP21 | JP22 | JP23 | JP24 |
|-------+----------+----------+------------+-----------------|
| 64KB | Pins 1 & | Pins 1 & | Open | Pins 3 & 4 |
| | 2 | 2 | | |
|-------+----------+----------+------------+-----------------|
| 128KB | Pins 2 & | Pins 1 & | Open | Pins 1 & 2, 3 & |
| | 3 | 2 | | 4 and 5 & 6 |
|-------+----------+----------+------------+-----------------|
| 256KB | Pins 1 & | Pins 1 & | Pins 1 & 2 | Pins 1 & 2, 3 & |
| | 2 | 2 | and 2 & 3 | 4 and 5 & 6 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
|Speed| JP6 | JP10 |JP25/pins 1&2|JP25/pins|JP25/pins| JP26 |
| | | | | 3&4 | 5&6 | |
|-----+------+------+-------------+---------+---------+------|
|25MHz|Pins 1|Pins 1| Open | Closed | Open |Pins 1|
| | & 2 | & 2 | | | | & 2 |
|-----+------+------+-------------+---------+---------+------|
|33MHz|Pins 1|Pins 1| Closed | Open | Closed |Pins 1|
| | & 2 | & 2 | | | | & 2 |
|-----+------+------+-------------+---------+---------+------|
|40MHz|Pins 2|Pins 2| Closed | Closed | Open |Pins 2|
| | & 3 | & 3 | | | | & 3 |
|-----+------+------+-------------+---------+---------+------|
| 50i |Pins 1|Pins 1| Open | Closed | Open |Pins 1|
| MHz | & 2 | & 2 | | | | & 2 |
|-----+------+------+-------------+---------+---------+------|
|50MHz|Pins 2|Pins 2| Open | Closed | Open |Pins 2|
| | & 3 | & 3 | | | | & 3 |
|-----+------+------+-------------+---------+---------+------|
| 66i |Pins 1|Pins 1| Closed | Open | Closed |Pins 1|
| MHz | & 2 | & 2 | | | | & 2 |
|------------------------------------------------------------|
|Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP7 | JP9 | JP11 | JP12 | JP16 | JP17 | JP20 |
|--------+---------+------+------+------+------+------+------|
|80486SX |Pins 1 & |Pins 1|Closed|Closed|Pins 1| N/A |Pins 1|
| | 2 | & 2 | | | & 2 | | & 2 |
|--------+---------+------+------+------+------+------+------|
|80487SX |Pins 1 & |Pins 1|Closed|Closed|Pins 2|Pins 1|Pins 1|
| | 2 | & 2 | | | & 3 | & 2 | & 2 |
|--------+---------+------+------+------+------+------+------|
|80487DX |Pins 1 & |Pins 1|Closed|Closed|Pins 2|Pins 2|Pins 1|
| | 2 | & 2 | | | & 3 | & 3 | & 2 |
|--------+---------+------+------+------+------+------+------|
|80486DX2|Pins 2 & |Pins 2| Open | Open |Pins 1| N/A |Pins 1|
| | 3 | & 3 | | | & 2 | | & 2 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE/BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | Wait states | JP1 | JP2 |
|-----------+---------------+-------------------+------------|
| £ 33MHz | 0 wait states | Pins 1 & 2 closed | Pins 1 & 2 |
| | | | closed |
|-----------+---------------+-------------------+------------|
| > 33MHz | 1 wait state | Pins 2 & 3 closed | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+