TEXT View Source
# KOUWELL ELECTRONIC CORPORATION
KW-420B
Processor 80486DX
Processor Speed 33MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
Cache 32/64/128/256KB
BIOS AMI
Dimensions 331mm x 218mm
I/O Options 32-bit external memory card slot
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| External battery | J10 | 32-bit external | S1 |
| | | memory card | |
|-------------------+----------+------------------+----------|
| Power LED & | J23 | Reset switch | SW1 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J24 | Turbo switch | SW2 |
|-------------------+----------+------------------+----------|
| Turbo LED | JP12 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select monochrome | JP1 | Open |
|---+----------------------------------+--------+------------|
| | Monitor type select color | JP1 | Closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP2 | pins 2 & 3 |
| | (internal battery) | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP2 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory normal operation | JP2 | Open |
| | (external battery) | | |
|---+----------------------------------+--------+------------|
| » | Bus speed select ATCLK/4 | JP3 | Open |
|---+----------------------------------+--------+------------|
| | Bus speed select ATCLK/6 | JP3 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP4 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP5 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP6 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP7 | N/A |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|--------+----------------+-----------+-----------+----------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|--------+----------------+-----------+-----------+----------|
| 8MB | (4) 1M x 9 | (4) 1M x | NONE | NONE |
| | | 9 | | |
|--------+----------------+-----------+-----------+----------|
| 12MB | (4) 1M x 9 | (4) 1M x | (4) 1M x | NONE |
| | | 9 | 9 | |
|--------+----------------+-----------+-----------+----------|
| 16MB | (4) 1M x 9 | (4) 1M x | (4) 1M x | (4) 1M x |
| | | 9 | 9 | 9 |
|--------+----------------+-----------+-----------+----------|
| 16MB | (4) 4M x 9 | NONE | NONE | NONE |
|--------+----------------+-----------+-----------+----------|
| 20MB | (4) 1M x 9 | (4) 4M x | NONE | NONE |
| | | 9 | | |
|--------+----------------+-----------+-----------+----------|
| 24MB | (4) 1M x 9 | (4) 1M x | (4) 4M x | NONE |
| | | 9 | 9 | |
|--------+----------------+-----------+-----------+----------|
| 28MB | (4) 4M x 9 | (4) 1M x | (4) 1M x | (4) 1M x |
| | | 9 | 9 | 9 |
|--------+----------------+-----------+-----------+----------|
| 32MB | (4) 4M x 9 | (4) 4M x | NONE | NONE |
| | | 9 | | |
|--------+----------------+-----------+-----------+----------|
| 36MB | (4) 1M x 9 | (4) 4M x | (4) 4M x | NONE |
| | | 9 | 9 | |
|--------+----------------+-----------+-----------+----------|
| 40MB | (4) 1M x 9 | (4) 1M x | (4) 4M x | (4) 4M x |
| | | 9 | 9 | 9 |
|--------+----------------+-----------+-----------+----------|
| 48MB | (4) 4M x 9 | (4) 4M x | (4) 4M x | NONE |
| | | 9 | 9 | |
|--------+----------------+-----------+-----------+----------|
| 52MB | (4) 1M x 9 | (4) 4M x | (4) 4M x | (4) 4M x |
| | | 9 | 9 | 9 |
|--------+----------------+-----------+-----------+----------|
| 64MB | (4) 4M x 9 | (4) 4M x | (4) 4M x | (4) 4M x |
| | | 9 | 9 | 9 |
|------------------------------------------------------------|
| Note:Banks 2 and 3 are used when 32-bit external memory |
| card is installed at S1. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG (U34) | Dirty Bit (U33) |
|----------+---------------+---------------+-----------------|
| 64KB | (8) 8K x 8 | (1) 8K x 8 | (1) 64K x 1 |
|----------+---------------+---------------+-----------------|
| 256KB | (8) 32K x 8 | (1) 32K x 8 | (1) 64K x 1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP8 | JP9 | JP10 | JP11 |
|-----------+------------+------------+----------+-----------|
| 64KB | Open | Open | Open | Open |
|-----------+------------+------------+----------+-----------|
| 256KB | Closed | Closed | Open | Closed |
+------------------------------------------------------------+