TEXT View Source
# ACER, INC.
486 SYSTEM (V20L)
Processor AM486SX/80486SX/AM486DX/80486DX/CX486DX2/AM486DX2/
80486DX2/P24D/P24T
Processor 25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set Unidentified
Video Chip None
Set
Maximum 48MB
Onboard
Memory
Maximum None
Video
Memory
Cache 128/256/512KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slot, floppy drive
interface, green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse port, serial ports (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+------------------+-------------|
| Serial port 1 | CN1 | Power LED & | CN9 pins 1 |
| | | keylock | - 4 |
|----------------+----------+------------------+-------------|
| Serial port 2 | CN2 | Reset | CN9 pins 7 |
| | | switch/green PC | & 8 |
| | | connector | |
|----------------+----------+------------------+-------------|
| 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 slots | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Password disabled | JP1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Password enabled | JP1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | OEM BIOS enabled | JP2 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP2 | Pins 1 & 2 |
| | alter | | closed |
|---+---------------------------------+-------+--------------|
| » | M5115 I/O enabled | JP8 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | M5115 I/O disabled | JP8 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Jumper information unidentified | JP10 | Unidentified |
|---+---------------------------------+-------+--------------|
| » | Local bus IDE I/O address | JP11 | Pins 1 & 2 |
| | select 0FXH | | closed |
|---+---------------------------------+-------+--------------|
| | Local bus IDE I/O address | JP11 | Pins 2 & 3 |
| | select 07XH | | closed |
|---+---------------------------------+-------+--------------|
| » | M5213N local bus IDE enabled | JP12 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | M5213N local bus IDE disabled | JP12 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Reset key enabled | JP23 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Reset key disabled | JP23 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Green PC connector enabled | JP24 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Reset switch enabled | JP24 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP41 | Pins 2 & 3 |
| | alter | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 4MB | None | None | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 8MB | None | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 8MB | None | None | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 12MB | (1) 2M x 36 | None | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 12MB | (1) 1M x 36 | None | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 12MB | None | (1) 1M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | None | None | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (1) 2M x 36 | None | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (1) 2M x 36 | None | (1) 2M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON'T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 20MB | None | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 20MB | None | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 1M x 36 | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 2M x 36 | None | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 2M x 36 | None | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 4M x 36 | None | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | None | (1) 4M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 28MB | (1) 1M x 36 | (1) 4M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | None | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 36MB | (1) 4M x 36 | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | JP13 | JP15 | JP16 |
|-------+-----------------+-----------------+----------------|
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP20 | JP26 | JP27 |
|----------+----------------+----------------+---------------|
| AM486SX | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| 80486SX | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| AM486DX | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| 80486DX | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| CX486DX2 | Pins 1 & 2 | Pins 2 & 3 | Open |
| | closed | closed | |
|----------+----------------+----------------+---------------|
| AM486DX2 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| 80486DX2 | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| P24D | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
|----------+----------------+----------------+---------------|
| P24T | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON'T) |
|------------------------------------------------------------|
| Type | JP33 | JP34 | JP35 | JP37 |
|----------+------------+------------+-----------+-----------|
| AM486SX | Pins 1 & 3 | Pins 2 & 3 | Pins 2 & | Pins 2 & |
| | closed | closed | 3 closed | 3 closed |
|----------+------------+------------+-----------+-----------|
| 80486SX | Pins 1 & 3 | Pins 2 & 3 | Pins 2 & | Pins 2 & |
| | closed | closed | 3 closed | 3 closed |
|----------+------------+------------+-----------+-----------|
| AM486DX | Pins 1 & 3 | Pins 2 & 3 | Pins 2 & | Pins 2 & |
| | closed | closed | 3 closed | 3 closed |
|----------+------------+------------+-----------+-----------|
| 80486DX | Pins 1 & 3 | Pins 2 & 3 | Pins 2 & | Pins 2 & |
| | closed | closed | 3 closed | 3 closed |
|----------+------------+------------+-----------+-----------|
| CX486DX2 | Pins 2 & 4 | Pins 1 & 2 | Pins 2 & | Pins 1 & |
| | closed | closed | 3 closed | 2 closed |
|----------+------------+------------+-----------+-----------|
| AM486DX2 | Pins 1 & 3 | Pins 2 & 3 | Pins 2 & | Pins 2 & |
| | closed | closed | 3 closed | 3 closed |
|----------+------------+------------+-----------+-----------|
| 80486DX2 | Pins 1 & 3 | Pins 2 & 3 | Pins 2 & | Pins 2 & |
| | closed | closed | 3 closed | 3 closed |
|----------+------------+------------+-----------+-----------|
| P24D | Pins 1 & 3 | Pins 2 & 3 | Pins 1 & | Pins 2 & |
| | closed | closed | 2 closed | 3 closed |
|----------+------------+------------+-----------+-----------|
| P24T | Pins 1 & 3 | Pins 2 & 3 | Pins 1 & | Pins 2 & |
| | closed | closed | 2 closed | 3 closed |
+------------------------------------------------------------+