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# VTECH INDUSTRIES, INC.
486 SERIES (MINI CASE) ASIC II (3 VESA SLOTS)
Processor 80486SX/80486DX/ODP486SX/80486DX2/Pentium
Overdrive
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set Unidentified
Max. Onboard 32MB
DRAM
Cache 128/256KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (3), PS/2 mouse
connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Front panel | J1 | PS/2 mouse | J27 |
| connector | | connector | |
|-------------------+----------+------------------+----------|
| External battery | J3 | Speaker | J29 |
|-------------------+----------+------------------+----------|
| Processor power | J10 | 32-bit VESA | SL1 - |
| connector | | local bus slots | SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Battery type select internal | JP8 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Battery type select external | JP8 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | VESA card select supports write | JP10 | pins 1 & 2 |
| | back cache | | closed |
|---+----------------------------------+--------+------------|
| | VESA card select does not | JP10 | pins 2 & 3 |
| | support write back cache | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP14 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select CGA/EGA/VGA | JP19 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select MDA/EGA/VGA | JP19 | Open |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP20 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP20 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Mouse IRQ12 disabled | JP21 | Open |
|---+----------------------------------+--------+------------|
| | Mouse IRQ12 enabled | JP21 | Closed |
|---+----------------------------------+--------+------------|
| » | CPU type select all | JP32 | Open |
|---+----------------------------------+--------+------------|
| | CPU type select Pentium | JP32 | pins 2 & 3 |
| | Overdrive | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP33 | pins 1 & 2 |
| | alter | | 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG (Bank | TAG (Bank |
| | | | 0) | 1) |
|-------+-------------+-----------+-------------+------------|
| 128KB | (4) 32K x 8 | NONE | (2) 8K x 8 | (2) 8K x 8 |
|-------+-------------+-----------+-------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (2) 8K x 8 | (2) 8K x 8 |
| | | 8 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP2 |
|----------------------------+-------------------------------|
| 128KB | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 256KB | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU UPGRADE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP1 |
|-------------------------------+----------------------------|
| None installed | pins 1 & 2 closed |
|-------------------------------+----------------------------|
| SX/DX/DX2 series installed | pins 2 & 3, 4 & 5 closed |
|-------------------------------+----------------------------|
| Overdrive series installed | pins 1 & 2, 5 & 6 closed |
|------------------------------------------------------------|
| 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 | JP13 |
|----------------------------+-------------------------------|
| 25MHz | pins 5 & 6 closed |
|----------------------------+-------------------------------|
| 33MHz | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| 50iMHz | pins 5 & 6 closed |
|----------------------------+-------------------------------|
| 66iMHz | pins 1 & 2, 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP11 |
|----------------------------+-------------------------------|
| 2x | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 2.5x | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 3x | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP9 |
|----------------------------+-------------------------------|
| <= 33MHz | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| > 33MHz | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| KEYBOARD CONFIGURATION |
|------------------------------------------------------------|
| Type | JP12 | JP15 | JP16 | JP17 | JP18 |
|------------+---------+---------+---------+--------+--------|
| Internal | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|------------+---------+---------+---------+--------+--------|
| External | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+