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# VTECH INDUSTRIES, INC.
486 SERIES (MINI CASE - ASIC II)
Processor 80486SX/80486DX/80486DX2
Processor Speed 25/33/50(internal)/66(internal)MHz
Chip Set Unidenitifed
Max. Onboard DRAM 32MB
Cache 128KB
BIOS Unidenitifed
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J3 | Front panel | J21 |
| | | connector | |
|------------------+----------+-------------------+----------|
| Speaker | J4 | 32-bit VESA local | SL1 & |
| | | bus slots | SL1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | JP1 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP3 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP10 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP11 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP11 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Battery type select internal | JP12 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Battery type select external | JP12 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | VESA card select does not | JP14 | pins 1 & 2 |
| | support write back cache | | closed |
|---+----------------------------------+--------+------------|
| | VESA card select supports write | JP14 | pins 2 & 3 |
| | back cache | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP15 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP19 | N/A |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 2MB | (4) 512K x 9 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (4) 512K x 9 | (4) 512K 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 CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 128KB | (4) 32K x 8 | (2) 8K x 8 |
|------------------+--------------------+--------------------|
| 128KB | (4) 32K x 9 | (2) 8K x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP5 | JP6 | JP7 | JP8 |
|---------+------------+------------+------------+-----------|
| 32K x 8 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 32K x 9 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & |
| | closed | closed | closed | 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU UPGRADE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP2 |
|----------------------------+-------------------------------|
| None installed | pins 1 & 2, 4 & 5 closed |
|----------------------------+-------------------------------|
| 80486SX/DX/DX2 series | pins 2 & 3, 4 & 5 closed |
| installed | |
|------------------------------------------------------------|
| Note: There is a PQFP CPU installed but the location |
| is unidentified. These CPU types are installed in the |
| PGA socket. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP16 | JP17 | JP18 |
|---------------+--------------+--------------+--------------|
| 25MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 50iMHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP4 | JP13 | JP20 |
|-----------+-------------------+-------------------+--------|
| <= 33MHz | pins 2 & 3 closed | pins 1 & 2 closed | Open |
|-----------+-------------------+-------------------+--------|
| > 33MHz | pins 1 & 2 closed | pins 2 & 3 closed | Closed |
+------------------------------------------------------------+