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# ACER, INC.
ACERPOWER 486 (V20 PROJECT)
Processor 80486SX/80486SX2/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor 25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set Unidentified
Max. 64MB
Onboard
DRAM
Cache 128/256/512KB
BIOS Acer
Dimensions 330mm x 218mm
I/O 32-bit VESA local bus slot, 32-bit PCI slots (3), green PC
Options connector, PS/2 mouse port
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| PS/2 mouse port | CN1 | 32-bit VESA local | SL1 |
| | | bus slot | |
|------------------+----------+-------------------+----------|
| 32-bit PCI slots | PC1 - | | |
| | PC3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------+--------+------------------|
| » | Factory configured - do | CN8 | N/A |
| | not alter | | |
|---+----------------------------+--------+------------------|
| » | Factory configured - do | CN9 | N/A |
| | not alter | | |
|---+----------------------------+--------+------------------|
| » | Factory configured - do | CN10 | N/A |
| | not alter | | |
|---+----------------------------+--------+------------------|
| » | Password enabled | JP1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------+--------+------------------|
| | Password disabled | JP1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------+--------+------------------|
| » | BIOS type select Acer | JP2 | pins 1 & 2 |
| | | | closed |
|---+----------------------------+--------+------------------|
| | BIOS type select OEM | JP2 | pins 2 & 3 |
| | | | closed |
|---+----------------------------+--------+------------------|
| » | Factory configured - do | JP3 | pins 3 & 4 |
| | not alter | | closed |
|---+----------------------------+--------+------------------|
| » | Factory configured - do | JP4 | pins 1 & 2, 3 & |
| | not alter | | 4, 5 & 6 closed |
|---+----------------------------+--------+------------------|
| | Factory configured - do | JP6 | pins 2 & 3 |
| | not alter | | closed |
|---+----------------------------+--------+------------------|
| » | Factory configured - do | JP7 | pins 2 & 3 |
| | not alter | | closed |
|---+----------------------------+--------+------------------|
| » | M5115 enabled | JP8 | pins 1 & 2 |
| | | | closed |
|---+----------------------------+--------+------------------|
| | M5115 disabled | JP8 | pins 2 & 3 |
| | | | closed |
|---+----------------------------+--------+------------------|
| » | Factory configured - do | JP10 | pins 1 & 2 |
| | not alter | | closed |
|---+----------------------------+--------+------------------|
| » | 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 |
|---+----------------------------+--------+------------------|
| » | Local bus IDE interface | JP12 | pins 2 & 3 |
| | enabled | | closed |
|---+----------------------------+--------+------------------|
| | Local bus IDE interface | JP12 | pins 1 & 2 |
| | disabled | | closed |
|---+----------------------------+--------+------------------|
| » | Reset button enabled | JP23 | pins 1 & 2 |
| | | | closed |
|---+----------------------------+--------+------------------|
| | Reset button disabled | JP23 | pins 2 & 3 |
| | | | closed |
|---+----------------------------+--------+------------------|
| » | Power saving feature | JP24 | pins 2 & 3 |
| | disabled | | closed |
|---+----------------------------+--------+------------------|
| | Power saving feature | JP24 | pins 1 & 2 |
| | enabled | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | NONE | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | NONE | (1) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 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 | NONE | (4) 128K x 8 | (1) 32K x 8 |
|------------------------------------------------------------|
| Note: The location of the TAG is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP9 | JP20 |
|--------------------+-------------------+-------------------|
| 80486SX | pins 2 & 3 closed | pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| 80486SX2 | pins 2 & 3 closed | pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| 80486DX | pins 2 & 3 closed | pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| 80486DX2 | pins 2 & 3 closed | pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| 80486DX4 | pins 2 & 3 closed | pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| Pentium Overdrive | pins 1 & 2 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP26 | JP27 |
|------------------+--------------------+--------------------|
| Intel | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| AMD | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP17 | JP21 |
|------------------+--------------------+--------------------|
| 25MHz | pins 1 & 5 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 33MHz | pins 2 & 6 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 50iMHz | pins 1 & 5 closed | pins 2 & 3 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 SPEED CONFIGURATION (80486DX4 ONLY) |
|------------------------------------------------------------|
| Speed | JP22 |
|----------------------------+-------------------------------|
| 2.0x | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 2.5x | pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 3.0x | pins 3 & 4 closed |
+------------------------------------------------------------+