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# UNIDENTIFIED
4386-VC-HD
Processor 80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set VIA
Max. Onboard DRAM 128MB
Cache 64/128/256KB
BIOS AMI/Award
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387DX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Turbo LED | J5 | Speaker | J8 |
|----------------+----------+---------------------+----------|
| Turbo switch | J6 | Power LED & keylock | J9 |
|----------------+----------+---------------------+----------|
| Reset switch | J7 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | J1 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J1 | Closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select | J2 | Open |
| | monochrome/EGA/VGA | | |
|---+----------------------------------+--------+------------|
| | Monitor type select color | J2 | Closed |
|---+----------------------------------+--------+------------|
| » | NPU synchronous with CPU | J40 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | NPU asynchronous with CPU | J40 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|----------------+---------------------+---------------------|
| 1MB | (4) 256K x 9 | NONE |
|----------------+---------------------+---------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|----------------+---------------------+---------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|----------------+---------------------+---------------------|
| 17MB | (4) 256K x 9 | (4) 4M x 9 |
|----------------+---------------------+---------------------|
| 65MB | (4) 256K x 9 | (4) 16M x 9 |
|----------------+---------------------+---------------------|
| 4MB | (4) 1M x 9 | NONE |
|----------------+---------------------+---------------------|
| 5MB | (4) 1M x 9 | (4) 256K x 9 |
|----------------+---------------------+---------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|----------------+---------------------+---------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|----------------+---------------------+---------------------|
| 68MB | (4) 1M x 9 | (4) 16M x 9 |
|----------------+---------------------+---------------------|
| 16MB | (4) 4M x 9 | NONE |
|----------------+---------------------+---------------------|
| 17MB | (4) 4M x 9 | (4) 256K x 9 |
|----------------+---------------------+---------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|----------------+---------------------+---------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
|----------------+---------------------+---------------------|
| 80MB | (4) 4M x 9 | (4) 16M x 9 |
|----------------+---------------------+---------------------|
| 64MB | (4) 16M x 9 | NONE |
|----------------+---------------------+---------------------|
| 65MB | (4) 16M x 9 | (4) 256K x 9 |
|----------------+---------------------+---------------------|
| 68MB | (4) 16M x 9 | (4) 1M x 9 |
|----------------+---------------------+---------------------|
| 80MB | (4) 16M x 9 | (4) 4M x 9 |
|----------------+---------------------+---------------------|
| 128MB | (4) 16M x 9 | (4) 16M x 9 |
|------------------------------------------------------------|
| Note: 16M x 4 SIMMs can only be used if an 80486 is |
| installed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | M10 | TAG |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 8K x 8 |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | (1) 8K x 8 |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 32K x | (1) 32K x |
| | | 8 | 8 | 8 |
|------------------------------------------------------------|
| Note: M10 is optional and does not have to be installed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JS1 | JS2 | JS3 | JS4 |
|-------+-------------+------------+------------+------------|
| 64KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 128KB | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 256KB | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED/TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JC1 | JC2 | JC3 |
|-------------+---------------+---------------+--------------|
| 80386DX-33 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------------+---------------+---------------+--------------|
| 80386DX-40 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------------+---------------+---------------+--------------|
| 80486SX-20 | pins 2 & 3 | pins 2 & 3 | Open |
| | closed | closed | |
|-------------+---------------+---------------+--------------|
| 80486SX-25 | pins 2 & 3 | pins 2 & 3 | Open |
| | closed | closed | |
|-------------+---------------+---------------+--------------|
| 80486SX-33 | pins 2 & 3 | pins 2 & 3 | Open |
| | closed | closed | |
|-------------+---------------+---------------+--------------|
| 80487SX-20 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|-------------+---------------+---------------+--------------|
| 80487SX-25 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|-------------+---------------+---------------+--------------|
| 80486DX-20 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------------+---------------+---------------+--------------|
| 80486DX-25 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------------+---------------+---------------+--------------|
| 80486DX-33 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------------+---------------+---------------+--------------|
| 80486DX-50 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------------+---------------+---------------+--------------|
| 80486DX2-50 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------------+---------------+---------------+--------------|
| 80486DX2-66 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED/TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JK1 | JK2 | JK3 | JK4 |
|-------------+-----------+-----------+-----------+----------|
| 80386DX-33 | pins 1 & | pins 1 & | pins 1 & | pins 2 & |
| | 2 closed | 2 closed | 2 closed | 3 closed |
|-------------+-----------+-----------+-----------+----------|
| 80386DX-40 | pins 1 & | pins 1 & | pins 1 & | pins 2 & |
| | 2 closed | 2 closed | 2 closed | 3 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486SX-20 | pins 1 & | pins 1 & | pins 2 & | pins 1 & |
| | 2 closed | 2 closed | 3 closed | 2 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486SX-25 | pins 1 & | pins 1 & | pins 2 & | pins 1 & |
| | 2 closed | 2 closed | 3 closed | 2 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486SX-33 | pins 2 & | pins 2 & | pins 2 & | pins 1 & |
| | 3 closed | 3 closed | 3 closed | 2 closed |
|-------------+-----------+-----------+-----------+----------|
| 80487SX-20 | pins 1 & | pins 1 & | pins 2 & | pins 1 & |
| | 2 closed | 2 closed | 3 closed | 2 closed |
|-------------+-----------+-----------+-----------+----------|
| 80487SX-25 | pins 1 & | pins 1 & | pins 2 & | pins 1 & |
| | 2 closed | 2 closed | 3 closed | 2 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486DX-20 | pins 1 & | pins 1 & | pins 2 & | pins 1 & |
| | 2 closed | 2 closed | 3 closed | 2 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486DX-25 | pins 1 & | pins 1 & | pins 2 & | pins 1 & |
| | 2 closed | 2 closed | 3 closed | 2 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486DX-33 | pins 2 & | pins 2 & | pins 2 & | pins 1 & |
| | 3 closed | 3 closed | 3 closed | 2 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486DX-50 | pins 2 & | pins 2 & | pins 2 & | pins 1 & |
| | 3 closed | 3 closed | 3 closed | 2 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486DX2-50 | pins 1 & | pins 1 & | pins 2 & | pins 1 & |
| | 2 closed | 2 closed | 3 closed | 2 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486DX2-66 | pins 2 & | pins 2 & | pins 2 & | pins 1 & |
| | 3 closed | 3 closed | 3 closed | 2 closed |
+------------------------------------------------------------+