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# ACER, INC.
AP5S
Device Type Mainboard
Processor Pentium
Processor Speed 75/90/100/120/133/150/166/200MHz
Chip Set SIS
Video Chip Set None
Maximum Onboard 512MB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256KB
BIOS Award
Dimensions 280mm x 220mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2),
parallel port, PS/2 mouse interface, serial
ports (2), IR connector, USB connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+-----------+----------------+------------|
| PS/2 mouse | CN4 | Green PC LED | CN11/pins |
| interface | | | 12 & 13 |
|------------------+-----------+----------------+------------|
| Serial port 1 | CN5 | Green PC | CN11/pins |
| | | connector | 15 – 17 |
|------------------+-----------+----------------+------------|
| Floppy drive | CN6 | Reset switch | CN11/pins |
| interface | | | 19 & 20 |
|------------------+-----------+----------------+------------|
| IDE interface 1 | CN7 | CPU fan power | JP17 |
|------------------+-----------+----------------+------------|
| Serial port 2 | CN8 | IR connector | JP21 |
|------------------+-----------+----------------+------------|
| Parallel port | CN9 | IDE interface | JP22 |
| | | LED | |
|------------------+-----------+----------------+------------|
| IDE interface 2 | CN10 | 32-bit PCI | PC1 – PC4 |
| | | slots | |
|------------------+-----------+----------------+------------|
| Power LED & | CN11/pins | USB connector | USB |
| keylock | 1 – 5 | | |
|------------------+-----------+----------------+------------|
| Speaker | CN11/pins | | |
| | 7 – 10 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | JP2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Flash BIOS voltage select 5v | JP8 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Flash BIOS voltage select 12v | JP8 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP9 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | PS/2 mouse enabled | JP10 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | PS/2 mouse disabled | JP10 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP11 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP12 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP12 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | On board I/O enabled | JP16 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | On board I/O disabled | JP16 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP23 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP24 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP25 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 36 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 36 | None |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 36 | None |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 16M x 36 | None |
|------------------+--------------------+--------------------|
| 136MB | (2) 16M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 144MB | (2) 16M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 160MB | (2) 16M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 192MB | (2) 16M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 256MB | (2) 16M x 36 | (2) 16M x 36 |
|------------------+--------------------+--------------------|
| 256MB | (2) 32M x 36 | None |
|------------------+--------------------+--------------------|
| 264MB | (2) 32M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 272MB | (2) 32M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 288MB | (2) 32M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 320MB | (2) 32M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 384MB | (2) 32M x 36 | (2) 16M x 36 |
|------------------+--------------------+--------------------|
| 512MB | (2) 32M x 36 | (2) 32M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 256KB | (2) 32K x 32 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP1 |
|-----------------------------+------------------------------|
| Linear mode | Pins 1 & 2 closed |
|-----------------------------+------------------------------|
| Interleave mode | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | JP3 | JP4 | JP14 | JP15 |
| speed | speed | | | | | |
|--------+--------+------------+------+------+-------+-------|
| 75MHz | 50MHz | 1.5x | 2 & | 2 & | 2 & 3 | 2 & 3 |
| | | | 3 | 3 | | |
|--------+--------+------------+------+------+-------+-------|
| 90MHz | 60MHz | 1.5x | 2 & | 1 & | 2 & 3 | 2 & 3 |
| | | | 3 | 2 | | |
|--------+--------+------------+------+------+-------+-------|
| 100MHz | 66MHz | 1.5x | 1 & | 2 & | 2 & 3 | 2 & 3 |
| | | | 2 | 3 | | |
|--------+--------+------------+------+------+-------+-------|
| 120MHz | 60MHz | 2x | 2 & | 1 & | 2 & 3 | 1 & 2 |
| | | | 3 | 2 | | |
|--------+--------+------------+------+------+-------+-------|
| 133MHz | 66MHz | 2x | 1 & | 2 & | 2 & 3 | 1 & 2 |
| | | | 2 | 3 | | |
|--------+--------+------------+------+------+-------+-------|
| 150MHz | 60MHz | 2.5x | 2 & | 1 & | 1 & 2 | 1 & 2 |
| | | | 3 | 2 | | |
|--------+--------+------------+------+------+-------+-------|
| 166MHz | 66MHz | 2.5x | 1 & | 2 & | 1 & 2 | 1 & 2 |
| | | | 2 | 3 | | |
|--------+--------+------------+------+------+-------+-------|
| 200MHz | 66MHz | 3x | 1 & | 2 & | 1 & 2 | 2 & 3 |
| | | | 2 | 3 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP5 | JP13 |
|------+--------------------------+--------------------------|
| P54C | Pins 1 & 2, 3 & 4, 5 & 6 | Pins 1 & 2, 3 & 4, 5 & 6 |
| | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP18 | JP19 | JP20 |
|---------------+---------------+---------------+------------|
| VRE | Closed | Open | Open |
|---------------+---------------+---------------+------------|
| STD | Open | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | JP6 | JP7 |
|------------------+--------------------+--------------------|
| 1 | Pins 2 & 3 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 3 | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+