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# VTECH INDUSTRIES, INC.
486 ASIC II
Processor 80486SX/80487SX/ODP486SX/80486DX/80486DX2
Processor 20/25/33/50(internal)/66(internal)MHz
Speed
Chip Set Unidentified
Max. Onboard 32MB
DRAM
Cache 128KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, game port, IDE interface,
parallel port, serial ports (2), VGA port
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------------+----------+---------------+----------|
| Front panel | J2 | Serial port 2 | J11 |
| connector | | | |
|----------------------+----------+---------------+----------|
| IDE interface LED | J3 | IDE interface | J12 |
|----------------------+----------+---------------+----------|
| External battery | J4 | Parallel port | J13 |
|----------------------+----------+---------------+----------|
| Speaker | J5 | Game port | J14 |
|----------------------+----------+---------------+----------|
| Floppy drive | J9 | VGA port | J16 |
| interface | | | |
|----------------------+----------+---------------+----------|
| Serial port 1 | J10 | Riser Card | SL1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | JP6 | pins 2 & 3 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Battery type select internal | JP7 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Battert type select external | JP7 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP8 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP8 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP9 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP11 | pins 2 & 3 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | On board I/O enabled | JP17 | Closed |
|---+----------------------------------+--------+------------|
| | On board I/O disabled | JP17 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|----------------------------+-------------------------------|
| 128KB | (4) 32K x 8 |
|----------------------------+-------------------------------|
| 128KB | (4) 32K x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 | JP3 | JP4 |
|-------+-------------+------------+------------+------------|
| 128KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 128KB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP10 |
|----------------------+-------------------------------------|
| 80486SX | pins 1 & 2 closed |
|----------------------+-------------------------------------|
| ODP486SX | pins 2 & 3 closed |
|----------------------+-------------------------------------|
| 80487SX | pins 2 & 3 closed |
|----------------------+-------------------------------------|
| 80486DX | pins 1 & 2 closed |
|----------------------+-------------------------------------|
| 80486DX2 | pins 1 & 2 closed |
|------------------------------------------------------------|
| Note: There is a PQFP socket installed but the |
| location is unidentifed. These CPU types are |
| installed in the PGA socket. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP5 |
|----------------------------+-------------------------------|
| 20MHz | pins 1 & 2, 5 & 6 closed |
|----------------------------+-------------------------------|
| 25MHz | pins 5 & 6 closed |
|----------------------------+-------------------------------|
| 33MHz | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| 50iMHz | pins 5 & 6 closed |
|----------------------------+-------------------------------|
| 66iMHz | pins 1 & 2, 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM CONFIGURATION |
|------------------------------------------------------------|
| Note: The size of the VRAM memory is unidentified. |
+------------------------------------------------------------+