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# ACER, INC.
ACERMATE 486/G (A1GX)
Device Mainboard
Type
Processor 80486/80486WB/CX486DX2/IBM486DX2/AM486DX2/AM486DX4/
P24T
Processor 25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set ALI M1429
Video Chip Cirrus Logic
Set
Maximum 36MB
Onboard
Memory
Maximum 2MB
Video
Memory
Cache 128/256KB
BIOS Unidentified
Dimensions 285mm x 220mm
I/O Floppy drive interface, IDE interfaces (2), parallel port,
Options PS/2 mouse port, serial ports (2), VGA feature connector, VGA
port, riser slot
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Chassis fan power | C1 | PS/2 mouse port | CN5 |
|-------------------+----------+------------------+----------|
| Feature connector | C2 | Floppy drive | CN6 |
| | | interface | |
|-------------------+----------+------------------+----------|
| VGA port | CN1 | IDE interface 2 | CN7 |
|-------------------+----------+------------------+----------|
| Parallel port | CN2 | IDE interface 1 | CN8 |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN3 | VGA feature | CN9 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN4 | Riser slot | SL1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | J1 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J3 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | BIOS type select Acer | JP1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | BIOS type select OEM | JP1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Password disabled | JP2 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Password enabled | JP2 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Normal boot enabled | JP3 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | COM1 boot enabled | JP3 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | On board I/O enabled | JP6 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | On board I/O disabled | JP6 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | On board video enabled | JP9 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | On board video disabled | JP9 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | IDE address select 074H, 078H, | JP10 | Pins 2 & 3 |
| | 07CH | | closed |
|---+---------------------------------+-------+--------------|
| | IDE address select 0F4H, 0F8H, | JP10 | Pins 1 & 2 |
| | 0FCH | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP11 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP12 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP19 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Reset button enabled | JP28 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Reset/green PC button enabled | JP28 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | IDE interface enabled | JP29 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | IDE interface disabled | JP29 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | BIOS type select EPROM | JPX1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | BIOS type select flash | JPX1 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|-------------+--------------+---------------+---------------|
| 4MB | 4MB | None | None |
|-------------+--------------+---------------+---------------|
| 4MB | None | (1) 1M x 36 | None |
|-------------+--------------+---------------+---------------|
| 8MB | 4MB | (1) 1M x 36 | None |
|-------------+--------------+---------------+---------------|
| 8MB | None | (1) 2M x 36 | None |
|-------------+--------------+---------------+---------------|
| 8MB | None | (1) 1M x 36 | (1) 1M x 36 |
|-------------+--------------+---------------+---------------|
| 12MB | 4MB | (1) 2M x 36 | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|-------------+--------------+---------------+---------------|
| 12MB | 4MB | (1) 1M x 36 | (1) 1M x 36 |
|-------------+--------------+---------------+---------------|
| 12MB | None | (1) 1M x 36 | (1) 2M x 36 |
|-------------+--------------+---------------+---------------|
| 16MB | 4MB | (1) 2M x 36 | (1) 1M x 36 |
|-------------+--------------+---------------+---------------|
| 16MB | None | (1) 4M x 36 | None |
|-------------+--------------+---------------+---------------|
| 16MB | None | (1) 2M x 36 | (1) 2M x 36 |
|-------------+--------------+---------------+---------------|
| 20MB | 4MB | (1) 4M x 36 | None |
|-------------+--------------+---------------+---------------|
| 20MB | None | (1) 1M x 36 | (1) 4M x 36 |
|-------------+--------------+---------------+---------------|
| 24MB | 4MB | (1) 1M x 36 | (1) 4M x 36 |
|-------------+--------------+---------------+---------------|
| 24MB | None | (1) 2M x 36 | (1) 4M x 36 |
|-------------+--------------+---------------+---------------|
| 28MB | 4MB | (1) 2M x 36 | (1) 4M x 36 |
|-------------+--------------+---------------+---------------|
| 32MB | None | (1) 4M x 36 | (1) 4M x 36 |
|-------------+--------------+---------------+---------------|
| 36MB | 4MB | (1) 4M x 36 | (1) 4M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP4 | JP5 |
|------------------------+-----------------+-----------------|
| » | On board 4MB | Pins 1 & 2 | Pins 2 & 3 |
| | enabled | closed | closed |
|---+--------------------+-----------------+-----------------|
| | On board 8MB | Pins 2 & 3 | Pins 1 & 2 |
| | enabled | closed | closed |
|---+--------------------+-----------------+-----------------|
| | On board memory | Pins 1 & 2 | Pins 1 & 2 |
| | disabled | closed | 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 | JP30 | JP31 |
|------------------+--------------------+--------------------|
| 128KB | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 256KB | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 512KB | (1) 256K x 16 | None | None |
|------------+---------------+---------------+---------------|
| 1MB | (1) 256K x 16 | (1) 256K x 16 | None |
|------------+---------------+---------------+---------------|
| 2MB | (1) 256K x 16 | (1) 256K x 16 | (2) 256K x 16 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP13 | JP14 | JP15 | JP17 | JP18 |
|---------------+--------+--------+--------+--------+--------|
| 80486 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------------+--------+--------+--------+--------+--------|
| 80486WB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------------+--------+--------+--------+--------+--------|
| CX486DX2 * | 2 & 3 | Open | 1 & 2 | 1 & 2 | 2 & 3 |
|---------------+--------+--------+--------+--------+--------|
| IBM486DX2 * | 2 & 3 | Open | 1 & 2 | 1 & 2 | 2 & 3 |
|---------------+--------+--------+--------+--------+--------|
| CX486DX2 | 2 & 3 | Open | 1 & 2 | 1 & 2 | 2 & 3 |
|---------------+--------+--------+--------+--------+--------|
| IBM486DX2 | 2 & 3 | Open | 1 & 2 | 1 & 2 | 2 & 3 |
|---------------+--------+--------+--------+--------+--------|
| AM486DX2 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|---------------+--------+--------+--------+--------+--------|
| AM486DX2(WB) | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|---------------+--------+--------+--------+--------+--------|
| AM 486DX4 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|---------------+--------+--------+--------+--------+--------|
| P24T | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. * |
| = 3.3v, 3.45v CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP19 | JP20 | JP21 | JP22 | JP23 |
|---------------+--------+--------+--------+--------+--------|
| 80486 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------------+--------+--------+--------+--------+--------|
| 80486WB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|---------------+--------+--------+--------+--------+--------|
| CX486DX2 * | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|---------------+--------+--------+--------+--------+--------|
| IBM486DX2 * | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|---------------+--------+--------+--------+--------+--------|
| CX486DX2 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|---------------+--------+--------+--------+--------+--------|
| IBM486DX2 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|---------------+--------+--------+--------+--------+--------|
| AM486DX2 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------------+--------+--------+--------+--------+--------|
| AM486DX2(WB) | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------------+--------+--------+--------+--------+--------|
| AM 486DX4 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|---------------+--------+--------+--------+--------+--------|
| P24T | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. * |
| = 3.3v, 3.45v CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP25 | JP26 | JP27 | JP32 | JPX2 | JPX3 |
|--------------+-------+-------+-------+-------+------+------|
| 80486 | 2 & 3 | 2 & 3 | 3 & 4 | 1 & 2 | 2 & | 2 & |
| | | | | | 3 | 3 |
|--------------+-------+-------+-------+-------+------+------|
| 80486WB | 2 & 3 | 1 & 2 | 3 & 4 | 1 & 2 | 2 & | 2 & |
| | | | | | 3 | 3 |
|--------------+-------+-------+-------+-------+------+------|
| CX486DX2 * | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & | 2 & |
| | | | | | 3 | 3 |
|--------------+-------+-------+-------+-------+------+------|
| IBM486DX2 * | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & | 2 & |
| | | | | | 3 | 3 |
|--------------+-------+-------+-------+-------+------+------|
| CX486DX2 | 1 & 2 | 2 & 3 | 3 & 4 | 1 & 2 | 2 & | 2 & |
| | | | | | 3 | 3 |
|--------------+-------+-------+-------+-------+------+------|
| IBM486DX2 | 1 & 2 | 2 & 3 | 3 & 4 | 1 & 2 | 2 & | 2 & |
| | | | | | 3 | 3 |
|--------------+-------+-------+-------+-------+------+------|
| AM486DX2 | 1 & 2 | 2 & 3 | 3 & 4 | 1 & 2 | 2 & | 2 & |
| | | | | | 3 | 3 |
|--------------+-------+-------+-------+-------+------+------|
| AM486DX2(WB) | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & | 2 & |
| | | | | | 3 | 3 |
|--------------+-------+-------+-------+-------+------+------|
| AM 486DX4 | 1 & 2 | 2 & 3 | 3 & 4 | 1 & 2 | 2 & | 2 & |
| | | | | | 3 | 3 |
|--------------+-------+-------+-------+-------+------+------|
| P24T | 2 & 3 | 1 & 2 | 3 & 4 | 1 & 2 | 2 & | 2 & |
| | | | | | 3 | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. * |
| = 3.3v, 3.45v CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | JP7 | JP8 |
|------------------+--------------------+--------------------|
| | 1 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|----+-------------+--------------------+--------------------|
| » | 3 | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+