TEXT View Source
# ACER, INC.
486 SYSTEM (V20)
Processor AM486SX/(SL)AM486SX/80486SX/AM486DX/(SL)AM486DX/80486DX/CX486DX2/AM486DX2(SL)AM486DX2/80486DX2/AM486DX4/
(SL)AM486DX4/80486DX4/P24D/P24T
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set Unidentified
Video Chip None
Set
Maximum 64MB
Onboard
Memory
Maximum None
Video
Memory
Cache 128/256/512KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O 32-bit VESA local bus slot, 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE
Options interfaces (2), parallel port, PS/2 mouse port, serial ports (2)
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+-----------+------------------+-------------|
| Serial port 1 | CN1 | Reset | CN9 pins 7 |
| | | switch/green PC | & 8 |
| | | connector | |
|---------------+-----------+------------------+-------------|
| Serial port 2 | CN2 | Power LED & | CN10 pins 1 |
| | | keylock | - 5 |
|---------------+-----------+------------------+-------------|
| Parallel port | CN3 | Speaker | CN10 pins 7 |
| | | | - 10 |
|---------------+-----------+------------------+-------------|
| Floppy drive | CN4 | Turbo LED | CN10 pins |
| interface | | | 12 & 13 |
|---------------+-----------+------------------+-------------|
| IDE interface | CN5 | Turbo switch | CN10 pins |
| 1 | | | 15 - 17 |
|---------------+-----------+------------------+-------------|
| IDE interface | CN6 | Reset switch | CN10 pins |
| 2 | | | 19 & 20 |
|---------------+-----------+------------------+-------------|
| PS/2 mouse | CN7 | 32-bit PCI slots | PC1 - PC3 |
| port | | | |
|---------------+-----------+------------------+-------------|
| IDE interface | CN8 | 32-bit VESA | SL1 |
| LED | | local bus slots | |
|---------------+-----------+------------------+-------------|
| Power LED & | CN9 pins | | |
| keylock | 1 - 4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 4MB | None | None | None | (1) 1M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 2M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 8MB | None | None | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | None | None | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 2M x 36 | None | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 2M x 36 | None | None | (1) 1M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | None | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | None | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | None | (1) 1M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | None | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | None | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | None | None | None | (1) 4M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | None | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | None | None | (1) 4M x |
| | | | | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | None | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | None | (1) 4M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 2M x 36 | None | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 2M x 36 | None | (1) 1M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 1M x 36 | (1) 4M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | None | None | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 2M x 36 | None | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | None | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 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 |
|------------------+--------------------+--------------------|
| 75iMHz | Pins 1 & 5 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 100iMHz | Pins 2 & 6 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP9 | JP20 | JP26 | JP27 |
|--------------+-----------+-----------+----------+----------|
| AM486SX | Pins 2 & | Pins 1 & | Pins 1 & | Pins 1 & |
| | 3 closed | 2 closed | 2 closed | 2 closed |
|--------------+-----------+-----------+----------+----------|
| (SL)AM486SX | Pins 1 & | Pins 1 & | Pins 1 & | Pins 1 & |
| | 2 closed | 2 closed | 2 closed | 2 closed |
|--------------+-----------+-----------+----------+----------|
| 80486SX | Pins 2 & | Pins 1 & | Pins 2 & | Pins 2 & |
| | 3 closed | 2 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| AM486DX | Pins 2 & | Pins 1 & | Pins 1 & | Pins 1 & |
| | 3 closed | 2 closed | 2 closed | 2 closed |
|--------------+-----------+-----------+----------+----------|
| (SL)AM486DX | Pins 1 & | Pins 1 & | Pins 1 & | Pins 1 & |
| | 2 closed | 2 closed | 2 closed | 2 closed |
|--------------+-----------+-----------+----------+----------|
| 80486DX | Pins 2 & | Pins 1 & | Pins 2 & | Pins 2 & |
| | 3 closed | 2 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| CX486DX2 | Pins 2 & | Pins 1 & | Pins 2 & | Open |
| | 3 closed | 2 closed | 3 closed | |
|--------------+-----------+-----------+----------+----------|
| AM486DX2 | Pins 2 & | Pins 1 & | Pins 1 & | Pins 1 & |
| | 3 closed | 2 closed | 2 closed | 2 closed |
|--------------+-----------+-----------+----------+----------|
| (SL)AM486DX2 | Pins 1 & | Pins 1 & | Pins 1 & | Pins 1 & |
| | 2 closed | 2 closed | 2 closed | 2 closed |
|--------------+-----------+-----------+----------+----------|
| 80486DX2 | Pins 2 & | Pins 1 & | Pins 2 & | Pins 2 & |
| | 3 closed | 2 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| AM486DX4 | Pins 2 & | Pins 1 & | Pins 1 & | Pins 1 & |
| | 3 closed | 2 closed | 2 closed | 2 closed |
|--------------+-----------+-----------+----------+----------|
| (SL)AM486DX4 | Pins 1 & | Pins 1 & | Pins 1 & | Pins 1 & |
| | 2 closed | 2 closed | 2 closed | 2 closed |
|--------------+-----------+-----------+----------+----------|
| 80486DX4 | Pins 2 & | Pins 1 & | Pins 2 & | Pins 2 & |
| | 3 closed | 2 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| P24D | Pins 2 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| P24T | Pins 2 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP33 | JP34 | JP35 | JP37 |
|--------------+-----------+-----------+----------+----------|
| AM486SX | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| (SL)AM486SX | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| 80486SX | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| AM486DX | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| (SL)AM486DX | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| 80486DX | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| CX486DX2 | Pins 2 & | Pins 1 & | Pins 2 & | Pins 1 & |
| | 4 closed | 2 closed | 3 closed | 2 closed |
|--------------+-----------+-----------+----------+----------|
| AM486DX2 | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| (SL)AM486DX2 | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| 80486DX2 | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| AM486DX4 | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| (SL)AM486DX4 | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| 80486DX4 | Pins 1 & | Pins 2 & | Pins 2 & | Pins 2 & |
| | 3 closed | 3 closed | 3 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| P24D | Pins 1 & | Pins 2 & | Pins 1 & | Pins 2 & |
| | 3 closed | 3 closed | 2 closed | 3 closed |
|--------------+-----------+-----------+----------+----------|
| P24T | Pins 1 & | Pins 2 & | Pins 1 & | Pins 2 & |
| | 3 closed | 3 closed | 2 closed | 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION (80486DX4 ONLY) |
|------------------------------------------------------------|
| » Multiplier | JP22 |
|-----------------------------+------------------------------|
| » | 2x | Pins 3 & 4 closed |
|--------+--------------------+------------------------------|
| » | 2.5x | Pins 2 & 3 closed |
|--------+--------------------+------------------------------|
| » | 3x | Pins 1 & 2 closed |
+------------------------------------------------------------+