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# ACER, INC.
ACERALTOS 900 (M7), M7
Device Type Mainboard
Processor Pentium
Processor Speed 75/90/100/120/133/150/166MHz
Chip Set Unidentified
Video Chip Set Unidentified
Maximum Onboard 192MB (EDO supported)
Memory
Maximum Video 1MB
Memory
Cache 256/512KB
BIOS Acer
Dimensions 330mm x 218mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interface, SCSI
interface, Wide Ultra SCSI interface,
parallel port, PS/2 mouse port, serial ports
(2), VGA interface, cache slot
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Serial port 1 | CN1 | VGA interface | CN13 |
|------------------+----------+-------------------+----------|
| Serial port 2 | CN2 | Power LED & | CN15 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| 5v power | CN3 | IDE interface | CN16 |
|------------------+----------+-------------------+----------|
| 3.3v power | CN4 | Speaker | CN17 |
|------------------+----------+-------------------+----------|
| Parallel port | CN5 | Reset/turbo | CN18 |
| | | switch | |
|------------------+----------+-------------------+----------|
| Floppy drive | CN6 | Chassis fan power | FA1 |
| interface | | | |
|------------------+----------+-------------------+----------|
| IDE interface | CN7 | Chassis fan power | FA2 |
| LED | | | |
|------------------+----------+-------------------+----------|
| LED connector | CN10 | PS/2 mouse port | MS1 |
|------------------+----------+-------------------+----------|
| SCSI-2 interface | CN11 | 32-bit PCI slots | PC1 - |
| | | | PC4 |
|------------------+----------+-------------------+----------|
| Wide SCSI | CN12 | Cache slot | SL1 |
| interface | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | CN8 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | CN9 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Termination switchable through | JP2 | Pins 2 & 3 |
| | SCSI select utility | | closed |
|---+---------------------------------+-------+--------------|
| | Termination enabled | JP2 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | SCSI select 16-bit | JP6 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | SCSI select 8-bit | JP6 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | BIOS type select Acer | JP8 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | BIOS type select OEM | JP8 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Password disabled | JP9 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Password enabled | JP9 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Buzzer enabled | JP10 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | External speaker enabled | JP10 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Front panel reset enabled | JP11 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Front panel reset disabled | JP11 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP12 | Pins 2 & 3 |
| | alter | | 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 |
|------------+---------------+---------------+---------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON'T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 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 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | SL1 |
|----------------------------+-------------------------------|
| 256KB | 256KB module installed |
|----------------------------+-------------------------------|
| 512KB | 512KB module installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP3 |
|----------------------------+-------------------------------|
| 256KB | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 512KB | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|-------------------+--------------------+-------------------|
| 512KB | 512KB | None |
|-------------------+--------------------+-------------------|
| 1MB | 512KB | 512KB |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| CPU speed | Clock | Multiplier | JP4 | JP5 | JP7 |
| | speed | | | | |
|------------+----------+------------+-------+-------+-------|
| 75MHz | 50MHz | 1.5x | 2 & 3 | 2 & 3 | 1 & 2 |
|------------+----------+------------+-------+-------+-------|
| 90MHz | 60MHz | 1.5x | 2 & 3 | 2 & 3 | 2 & 3 |
|------------+----------+------------+-------+-------+-------|
| 100MHz | 66MHz | 1.5x | 2 & 3 | 2 & 3 | 3 & 4 |
|------------+----------+------------+-------+-------+-------|
| 120MHz | 60MHz | 2x | 2 & 3 | 1 & 2 | 2 & 3 |
|------------+----------+------------+-------+-------+-------|
| 133MHz | 66MHz | 2x | 2 & 3 | 1 & 2 | 3 & 4 |
|------------+----------+------------+-------+-------+-------|
| 150MHz | 60MHz | 2.5x | 1 & 2 | 1 & 2 | 2 & 3 |
|------------+----------+------------+-------+-------+-------|
| 166MHz | 66MHz | 2.5x | 1 & 2 | 1 & 2 | 3 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP13 | JP14 | JP15 | JP16 |
|------+------+--------+--------+----------------------------|
| P54C | Open | Closed | Closed | 1 & 2, 3 & 4, 8 & 9, 10 & |
| | | | | 11 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP1 |
|----------------------------+-------------------------------|
| | VR | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| » | VRE | Pins 2 & 3 closed |
+------------------------------------------------------------+