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# ACER, INC.
V433S
Processor CX486S/80486SX/80486DX/80486DX2
Processor Speed 25/33/40/50(internal)/50/66(internal)MHz
Chip Set SIS
Max. Onboard DRAM 32MB
Cache 128/256KB
BIOS AMI
Dimensions 254mm x 220mm
I/O Options 32-bit VESA local bus slots (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------+-----------+---------------------+------------|
| Power LED & | JP2 (pins | Turbo switch | JP2 (pins |
| keylock | 1 - 5) | | 15 - 17) |
|-------------+-----------+---------------------+------------|
| Speaker | JP2 (pins | Reset switch | JP2 (pins |
| | 6 - 10) | | 19 - 20) |
|-------------+-----------+---------------------+------------|
| Turbo LED | JP2 (pins | 32-bit VESA local | SL1 & SL2 |
| | 12 - 13) | bus slots | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | J1 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Fast A20 select CMOS | JP20 | pins 2 & 3 |
| | configuration | | closed |
|---+----------------------------------+--------+------------|
| | Fast A20 select keyboard | JP20 | pins 1 & 2 |
| | | | 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 |
|------------------+--------------------+--------------------|
| 8MB | (4) 2M x 9 | NONE |
|------------------+--------------------+--------------------|
| 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 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP9 | JP10 |
|------------------+--------------------+--------------------|
| 128KB | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 256KB | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP7 |
|----------------------------+-------------------------------|
| 25MHz | pins 5 & 6 closed |
|----------------------------+-------------------------------|
| 33MHz | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 40MHz | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| 50iMHz | pins 5 & 6 closed |
|----------------------------+-------------------------------|
| 50MHz | pins 3 & 4 closed |
|----------------------------+-------------------------------|
| 66iMHz | pins 1 & 2 closed |
+------------------------------------------------------------+