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# ACER, INC.
ACERALTOS 900 PRO (M11A), M11A
Device Type Mainboard
Processor Pentium Pro
Processor Speed 180/200MHz
Chip Set Unidentified
Maximum Onboard 384MB (EDO supported)
Memory
Cache 256/512KB (located on Pentium Pro CPU)
Dimensions 330mm x 218mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
IDE interfaces (2), SCSI interface, Wide
Ultra SCSI interface, parallel port, PS/2
mouse port, serial ports (2), VRM connector
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Serial port 1 | CN1 | Power LED & | CN16 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Serial port 2 | CN2 | Reset switch/RDM | CN17 |
| | | cable connector | |
|------------------+----------+-------------------+----------|
| Parallel port | CN3 | IDE interface LED | CN18 |
|------------------+----------+-------------------+----------|
| Floppy drive | CN5 | CPU fan power | FA1 |
| interface | | | |
|------------------+----------+-------------------+----------|
| IDE interface 1 | CN6 | VRM connector | J7 |
|------------------+----------+-------------------+----------|
| IDE interface 2 | CN7 | Wide SCSI | J8 |
| | | interface | |
|------------------+----------+-------------------+----------|
| RDM connector | CN8 | SCSI interface | J12 |
|------------------+----------+-------------------+----------|
| RDM connector | CN9 | PS/2 mouse port | MS1 |
|------------------+----------+-------------------+----------|
| Speaker | CN15 | 32-bit PCI slots | PC1 - |
| | | | PC4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | CN10 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | CN11 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | CN12 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | CNN1 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | FA2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | FA3 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | FA4 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | BIOS type select Acer | J4 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | BIOS type select OEM | J4 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Password enabled | J5 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Password disabled | J5 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | SCSI type select wide | J6 | Closed |
|---+---------------------------------+-------+--------------|
| | SCSI type select narrow | J6 | Open |
|---+---------------------------------+-------+--------------|
| » | Buzzer enabled | J13 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | External speaker enabled | J13 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Reset switch enabled | JMP1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Reset switch disabled, Green PC | JMP1 | Pins 2 & 3 |
| | enabled | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 8MB | (2) 1M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 16MB | (2) 2M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 24MB | (2) 1M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (2) 4M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON'T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 48MB | (2) 4M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 56MB | (2) 4M x 36 | (2) 2M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (2) 8M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 80MB | (2) 8M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 88MB | (2) 8M x 36 | (2) 2M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 96MB | (2) 4M x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 96MB | (2) 8M x 36 | (2) 2M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 104MB | (2) 8M x 36 | (2) 4M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 112MB | (2) 8M x 36 | (2) 4M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 128MB | (2) 8M x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 128MB | (2) 16M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 136MB | (2) 8M x 36 | (2) 8M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 136MB | (2) 16M x 36 | (2) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 144MB | (2) 16M x 36 | (2) 2M x 36 | None |
|------------+---------------+---------------+---------------|
| 144MB | (2) 16M x 36 | (2) 1M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 152MB | (2) 16M x 36 | (2) 2M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 160MB | (2) 16M x 36 | (2) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 160MB | (2) 16M x 36 | (2) 2M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 168MB | (2) 16M x 36 | (2) 4M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 176MB | (2) 16M x 36 | (2) 4M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 192MB | (2) 16M x 36 | (2) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 192MB | (2) 16M x 36 | (2) 4M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 200MB | (2) 16M x 36 | (2) 8M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 208MB | (2) 16M x 36 | (2) 8M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 224MB | (2) 16M x 36 | (2) 8M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 256MB | (2) 16M x 36 | (2) 16M x 36 | None |
|------------+---------------+---------------+---------------|
| 256MB | (2) 16M x 36 | (2) 8M x 36 | (2) 8M x 36 |
|------------+---------------+---------------+---------------|
| 264MB | (2) 16M x 36 | (2) 16M x 36 | (2) 1M x 36 |
|------------+---------------+---------------+---------------|
| 272MB | (2) 16M x 36 | (2) 16M x 36 | (2) 2M x 36 |
|------------+---------------+---------------+---------------|
| 288MB | (2) 16M x 36 | (2) 16M x 36 | (2) 4M x 36 |
|------------+---------------+---------------+---------------|
| 320MB | (2) 16M x 36 | (2) 16M x 36 | (2) 8M x 36 |
|------------+---------------+---------------+---------------|
| 384MB | (2) 16M x 36 | (2) 16M x 36 | (2) 16M x 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 256KB/512KB cache is located on the Pentium Pro CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (PENTIUM 5 COLUMNS) |
|------------------------------------------------------------|
|CPU speed| Clock |Multiplier|CN13/ |CN13/ |CN13/|CN13/ |J9 |
| | speed | | | | | | |
| | | | pins | pins |pins | pins | |
| | | | | | | | |
| | | |1 & 5 |2 & 6 |3 & 7|4 & 8 | |
|---------+--------+----------+------+------+-----+------+---|
| 180MHz | 60MHz | 3x |Closed|Closed|Open |Closed|1 &|
| | | | | | | | 2 |
|---------+--------+----------+------+------+-----+------+---|
| 200MHz | 66MHz | 3x |Closed|Closed|Open |Closed|2 &|
| | | | | | | | 3 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | CN14/pins 1 | CN14/pins | CN14/pins | CN14/pins |
| | & 5 | 2 & 6 | 3 & 7 | 4 & 8 |
|----------+-------------+-----------+-----------+-----------|
| | 2.1v | Open | Open | Open | Closed |
|---+------+-------------+-----------+-----------+-----------|
| | 2.2v | Open | Open | Closed | Open |
|---+------+-------------+-----------+-----------+-----------|
| | 2.3v | Open | Open | Closed | Closed |
|---+------+-------------+-----------+-----------+-----------|
| | 2.4v | Open | Closed | Open | Open |
|---+------+-------------+-----------+-----------+-----------|
| | 2.5v | Open | Closed | Open | Closed |
|---+------+-------------+-----------+-----------+-----------|
| | 2.6v | Open | Closed | Closed | Open |
|---+------+-------------+-----------+-----------+-----------|
| | 2.7v | Open | Closed | Closed | Closed |
|---+------+-------------+-----------+-----------+-----------|
| | 2.8v | Closed | Open | Open | Open |
|---+------+-------------+-----------+-----------+-----------|
| | 2.9v | Closed | Open | Open | Closed |
|---+------+-------------+-----------+-----------+-----------|
| | 3.0v | Closed | Open | Closed | Open |
|---+------+-------------+-----------+-----------+-----------|
| | 3.1v | Closed | Open | Closed | Closed |
|---+------+-------------+-----------+-----------+-----------|
| | 3.2v | Closed | Closed | Open | Open |
|---+------+-------------+-----------+-----------+-----------|
| » | 3.3v | Closed | Closed | Open | Closed |
|---+------+-------------+-----------+-----------+-----------|
| | 3.4v | Closed | Closed | Closed | Open |
|---+------+-------------+-----------+-----------+-----------|
| | 3.5v | Closed | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SCSI TERMINATON SELECTION |
|------------------------------------------------------------|
| Setting | J10 |
|----------------------------------------+-------------------|
| | Termination disabled | Open |
|---+------------------------------------+-------------------|
| | Termination enabled | Pins 1 & 2 closed |
|---+------------------------------------+-------------------|
| » | Termination switchable through | Pins 2 & 3 closed |
| | SCSI select utility | |
+------------------------------------------------------------+