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# MICROMEDIA TECHNOLOGIES, INC.
486-VLS
Processor 80486SX/80486DX/80486DX2
Processor Speed 25/33/40/50(internal)/50/66(internal)MHz
Chip Set SIS
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI
Dimensions 230mm x 218mm
I/O Options 32-bit VESA local bus slots (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+----------+-----------------------+----------|
| Power LED & | CN1 | Turbo switch | CN5 |
| keylock | | | |
|--------------+----------+-----------------------+----------|
| Reset switch | CN2 | External battery | CN6 |
|--------------+----------+-----------------------+----------|
| Speaker | CN3 | 32-bit VESA Local bus | S1 |
| | | slot | |
|--------------+----------+-----------------------+----------|
| Turbo LED | CN4 | 32-bit VESA Local bus | S2 |
| | | slot | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------+-----------+-------------|
| » | 80486 (PQFP) | JP16 | Open |
|---+------------------------------+-----------+-------------|
| | 80486(PGA) | JP16 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP13 | JP14 | JP15 |
|-----------+-------------------+-------------------+--------|
| 80486SX | Open | pins 2 & 3 closed | Open |
|-----------+-------------------+-------------------+--------|
| 80487SX | pins 2 & 3 closed | pins 1 & 2 closed | Closed |
|-----------+-------------------+-------------------+--------|
| 80486DX | pins 1 & 2 closed | pins 1 & 2 closed | Closed |
|-----------+-------------------+-------------------+--------|
| 80486DX2 | pins 1 & 2 closed | pins 1 & 2 closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Type | JP20 | JP21 | JP22 |
|-------------+---------------+---------------+--------------|
| 25MHz | Closed | Open | Open |
|-------------+---------------+---------------+--------------|
| 33MHz | Closed | Closed | Closed |
|-------------+---------------+---------------+--------------|
| 40MHz | Closed | Closed | Open |
|-------------+---------------+---------------+--------------|
| 50MHz | Open | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 | JP3 | JP4 | JP5 | JP6 | JP7 |
|-------+-------+-------+-------+-------+------+------+------|
| 64KB | pins | pins | pins | pins | pins | N/A | pins |
| | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & | | 1 & |
| | | | | | 3 | | 2 |
|-------+-------+-------+-------+-------+------+------+------|
| 128KB | pins | pins | pins | pins | pins | pins | pins |
| | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 | 1 & | 1 & | 2 & |
| | | | | | 2 | 2 | 3 |
|-------+-------+-------+-------+-------+------+------+------|
| 256KB | pins | pins | pins | pins | pins | pins | pins |
| | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & | 2 & | 2 & |
| | | | | | 3 | 3 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE/BUS SPEED (S1 & S2) CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | S1/JP8 | S1/JP9 | S2/JP10 | S2/JP11 |
|-----------+-------------+----------+------------+----------|
| £ 33MHz | pins 1 & 2 | N/A | pins 1 & 2 | N/A |
| | closed | | closed | |
|-----------+-------------+----------+------------+----------|
| > 33MHz | pins 2 & 3 | N/A | pins 2 & 3 | N/A |
| | closed | | closed | |
|-----------+-------------+----------+------------+----------|
| 0 wait | N/A | pins 1 & | N/A | pins 1 & |
| states | | 2 closed | | 2 closed |
|-----------+-------------+----------+------------+----------|
| 1 wait | N/A | pins 2 & | N/A | pins 2 & |
| state | | 3 closed | | 3 closed |
+------------------------------------------------------------+