TEXT View Source
# ACER, INC.
486 VESA SYSTEM (VER. 2)
Processor 80486SX/80486DX/80486DX2
Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set Unidentified
Video Chip Set None
Maximum Onboard 64MB
Memory
Maximum Video None
Memory
Cache 128/256KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (2), floppy drive
interface, IDE interface, SCSI connector,
parallel port, PS/2 mouse port, serial ports
(2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| PS/2 mouse port | CN1 | IDE interface | CN8 |
|-----------------+----------+--------------------+----------|
| HDD/FDD power | CN2 | VGA control | J4 |
| connector for | | connector for EPA | |
| EPA | | | |
|-----------------+----------+--------------------+----------|
| SCSI interface | CN3 | Chassis fan power | J9 |
|-----------------+----------+--------------------+----------|
| Parallel port | CN4 | Front panel LEDs | J10 |
|-----------------+----------+--------------------+----------|
| Serial port 1 | CN5 | Auxiliary | J11 |
| | | keyboard/PS/2 | |
| | | mouse | |
|-----------------+----------+--------------------+----------|
| Serial port 2 | CN6 | IDE interface LED | J12 |
|-----------------+----------+--------------------+----------|
| Floppy drive | CN7 | 32-bit VESA local | SL1 & |
| interface | | bus slots | SL2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| | Jumper information unavailable | CN9 | Unidentified |
|---+---------------------------------+-------+--------------|
| » | Password check disabled | JP1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Password check enabled | JP1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Jumper information unavailable | JP2 | Unidentified |
|---+---------------------------------+-------+--------------|
| | SCSI IRQ select IRQ10 | JP3 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | SCSI IRQ select IRQ11 | JP3 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | SCSI IRQ disabled | JP3 | Open |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP4 | Open |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP5 | Open |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | SCSI I/O address select 340h - | JP6 | Open |
| | 35Fh | | |
|---+---------------------------------+-------+--------------|
| | SCSI I/O address select 140h - | JP6 | Closed |
| | 15Fh | | |
|---+---------------------------------+-------+--------------|
| | Onboard M5105 disabled | JP7 | Open |
|---+---------------------------------+-------+--------------|
| | Onboard M5105 enabled | JP7 | Closed |
|---+---------------------------------+-------+--------------|
| » | Parallel port bidirectional | JP8 | Closed |
| | enabled | | |
|---+---------------------------------+-------+--------------|
| | Parallel port bidirectional | JP8 | Open |
| | disabled | | |
|---+---------------------------------+-------+--------------|
| | Battery type select internal | JP9 | Closed |
|---+---------------------------------+-------+--------------|
| | Battery type select external | JP9 | Open |
|---+---------------------------------+-------+--------------|
| | Reset button disabled | JP23 | Open |
|---+---------------------------------+-------+--------------|
| | Reset button enabled | JP23 | Closed |
|---+---------------------------------+-------+--------------|
| | Keylock enabled | JP24 | Open |
|---+---------------------------------+-------+--------------|
| | Keylock disabled | JP24 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0A | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|----------+---------+---------+---------+---------+---------|
| 4MB | 4MB | None | None | None | None |
|----------+---------+---------+---------+---------+---------|
| 8MB | 4MB | None | (1) 1M | None | None |
| | | | x 36 | | |
|----------+---------+---------+---------+---------+---------|
| 12MB | 4MB | None | (1) 1M | (1) 1M | None |
| | | | x 36 | x 36 | |
|----------+---------+---------+---------+---------+---------|
| 16MB (A) | 4MB | None | (1) 1M | (1) 1M | (1) 1M |
| | | | x 36 | x 36 | x 36 |
|----------+---------+---------+---------+---------+---------|
| 16MB (B) | 4MB | (1) 4M | None | None | None |
| | | x 36 | | | |
|----------+---------+---------+---------+---------+---------|
| 20MB | 4MB | None | (1) 4M | None | None |
| | | | x 36 | | |
|----------+---------+---------+---------+---------+---------|
| 24MB | 4MB | None | (1) 1M | (1) 4M | None |
| | | | x 36 | x 36 | |
|----------+---------+---------+---------+---------+---------|
| 32MB | 4MB | (1) 4M | (1) 4M | None | None |
| | | x 36 | x 36 | | |
|----------+---------+---------+---------+---------+---------|
| 36MB | 4MB | None | (1) 4M | (1) 4M | None |
| | | | x 36 | x 36 | |
|----------+---------+---------+---------+---------+---------|
| 40MB | 4MB | None | (1) 1M | (1) 4M | (1) 4M |
| | | | x 36 | x 36 | x 36 |
|----------+---------+---------+---------+---------+---------|
| 48MB | 4MB | (1) 4M | (1) 4M | (1) 4M | None |
| | | x 36 | x 36 | x 36 | |
|----------+---------+---------+---------+---------+---------|
| 64MB | 4MB | (1) 4M | (1) 4M | (1) 4M | (1) 4M |
| | | x 36 | x 36 | x 36 | x 36 |
|------------------------------------------------------------|
| Note: If Bank 0 is populated, Bank 0A needs to be disabled |
| with JP15.. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP15 |
|----------------------------+-------------------------------|
| 4MB | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 8MB | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 12MB | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 16MB (A) | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 16MB (B) | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 20MB | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 24MB | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 32MB | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 36MB | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 40MB | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 48MB | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 64MB | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP20 | JP21 | JP22 |
|------------+-------------------+-------------+-------------|
| 128KB | Pins 1 & 2 closed | Closed | Open |
|------------+-------------------+-------------+-------------|
| 256KB | Pins 2 & 3 closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP10 |
|----------------------------+-------------------------------|
| 20MHz | Pins 1 & 6 closed |
|----------------------------+-------------------------------|
| 25MHz | Pins 2 & 7 closed |
|----------------------------+-------------------------------|
| 33MHz | Pins 3 & 8 closed |
|----------------------------+-------------------------------|
| 40MHz | Pins 4 & 9 closed |
|----------------------------+-------------------------------|
| 50iMHz | Pins 2 & 7 closed |
|----------------------------+-------------------------------|
| 50MHz | Pins 5 & 10 closed |
|----------------------------+-------------------------------|
| 66iMHz | Pins 3 & 8 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS WAIT STATE SELECTION |
|------------------------------------------------------------|
| Setting | JP11 |
|---------------------------------+--------------------------|
| » | 0 | Open |
|--------+------------------------+--------------------------|
| | 1 | Closed |
+------------------------------------------------------------+