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# ACER, INC.
V20L-486 ALL IN ONE
Processor AM486SX/80486SX/AM486DX/80486DX/CX486DX2/AM486DX2/
80486DX2/80486DX4/P24D/P24T
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set ALI
Video Chip None
Set
Maximum Unidentified
Onboard
Memory
Maximum None
Video
Memory
Cache 128/256/512KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O 32-bit VESA local bus slot, floppy drive interface, green PC
Options connector, IDE interfaces (2), parallel port, PS/2 mouse port,
serial ports (2)
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+------------------+-------------|
| Serial port 2 | CN1 | Power LED & | CN9/pins 1 |
| | | keylock | - 4 |
|----------------+----------+------------------+-------------|
| Serial port 1 | CN2 | Reset switch | CN9/pins 7 |
| | | | & 8 |
|----------------+----------+------------------+-------------|
| Parallel port | CN3 | Power LED & | CN10/pins 1 |
| | | keylock | - 5 |
|----------------+----------+------------------+-------------|
| Floppy drive | CN4 | Speaker | CN10/pins 7 |
| interface | | | - 10 |
|----------------+----------+------------------+-------------|
| IDE interface | CN5 | Turbo LED | CN10/pins |
| 1 | | | 12 & 13 |
|----------------+----------+------------------+-------------|
| IDE interface | CN6 | Turbo switch | CN10/pins |
| 2 | | | 15 - 17 |
|----------------+----------+------------------+-------------|
| PS/2 mouse | CN7 | Reset switch | CN10/pins |
| port | | | 19 & 20 |
|----------------+----------+------------------+-------------|
| IDE interface | CN8 | 32-bit VESA | SL1 |
| LED | | local bus slot | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Password disabled | J1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Password enabled | J1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J2 | Pins 2 & 3 |
| | alter (OEM BIOS enabled) | | closed |
|---+---------------------------------+-------+--------------|
| » | M5115 I/O enabled | J8 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | M5115 I/O disabled | J8 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J10 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Local bus IDE I/O address | J11 | Pins 1 & 2 |
| | select 0FXH | | closed |
|---+---------------------------------+-------+--------------|
| | Local bus IDE I/O address | J11 | Pins 2 & 3 |
| | select 07XH | | closed |
|---+---------------------------------+-------+--------------|
| » | Local bus IDE enabled | J12 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Local bus IDE disabled | J12 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J22 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | Reset switch enabled | J23 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Reset switch disabled | J23 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Green PC connector enabled | J24 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Green PC connector disabled | J24 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Factory configured - do not | J41 | Pins 2 & 3 |
| | alter | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Note: The maximum amount of memory is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | None | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 128K x 8 | None | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J13 | J15 | J16 |
|-------+-----------------+-----------------+----------------|
| 128KB | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 256KB | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 512KB | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP17 | JP21 |
|------------------+--------------------+--------------------|
| 25MHz | Pins 1 & 5 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 33MHz | Pins 2 & 6 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 40MHz | Pins 3 & 7 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 50iMHz | Pins 1 & 5 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 50MHz | Pins 4 & 8 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 66iMHz | Pins 2 & 6 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 75iMHz | Pins 1 & 5 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 100iMHz | Pins 2 & 6 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | J20 | J26 | J27 | J33 | J34 | J35 | J37 |
|----------+------+------+-------+------+------+------+------|
| AM486SX | 1 & | 1 & | 1 & 2 | 1 & | 2 & | 2 & | 2 & |
| | 2 | 2 | | 3 | 3 | 3 | 3 |
|----------+------+------+-------+------+------+------+------|
| 80486SX | 1 & | 2 & | 2 & 3 | 1 & | 2 & | 2 & | 2 & |
| | 2 | 3 | | 3 | 3 | 3 | 3 |
|----------+------+------+-------+------+------+------+------|
| AM486DX | 1 & | 1 & | 1 & 2 | 1 & | 2 & | 2 & | 2 & |
| | 2 | 2 | | 3 | 3 | 3 | 3 |
|----------+------+------+-------+------+------+------+------|
| 80486DX | 1 & | 2 & | 2 & 3 | 1 & | 2 & | 2 & | 2 & |
| | 2 | 3 | | 3 | 3 | 3 | 3 |
|----------+------+------+-------+------+------+------+------|
| CX486DX2 | 1 & | 2 & | Open | 2 & | 1 & | 2 & | 1 & |
| | 2 | 3 | | 4 | 2 | 3 | 2 |
|----------+------+------+-------+------+------+------+------|
| AM486DX2 | 1 & | 1 & | 1 & 2 | 1 & | 2 & | 2 & | 2 & |
| | 2 | 2 | | 3 | 3 | 3 | 3 |
|----------+------+------+-------+------+------+------+------|
| 80486DX2 | 1 & | 2 & | 2 & 3 | 1 & | 2 & | 2 & | 2 & |
| | 2 | 3 | | 3 | 3 | 3 | 3 |
|----------+------+------+-------+------+------+------+------|
| 80486DX4 | 1 & | 2 & | 2 & 3 | 1 & | 2 & | 2 & | 2 & |
| | 2 | 3 | | 3 | 3 | 3 | 3 |
|----------+------+------+-------+------+------+------+------|
| P24D | 2 & | 2 & | 2 & 3 | 1 & | 2 & | 1 & | 2 & |
| | 3 | 3 | | 3 | 3 | 2 | 3 |
|----------+------+------+-------+------+------+------+------|
| P24T | 2 & | 2 & | 2 & 3 | 1 & | 2 & | 1 & | 2 & |
| | 3 | 3 | | 3 | 3 | 2 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+