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# ACER, INC.
V12LC
Device Type Mainboard
Processor CX M1/AM K5/Pentium
Processor Speed 75/90/100/120/133/150MHz
Chip Set Unidentified
Video Chip Set Cirrus Logic
Maximum Onboard 128MB
Memory
Maximum Video 2MB
Memory
Cache 256KB
BIOS Acer
Dimensions 330mm x 218mm
I/O Options Ethernet 10BaseT connector, floppy drive
interface, green PC connector, IDE interfaces
(2), parallel port, PS/2 mouse port, serial
ports (2), VGA feature connector, VGA port,
riser slot
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+--------------------+------------|
| VGA port | C1 | Power LED & | CN6/pins 1 |
| | | keylock | - 5 |
|---------------+----------+--------------------+------------|
| Parallel port | C2 | Speaker | CN6/pins 7 |
| | | | - 10 |
|---------------+----------+--------------------+------------|
| Serial port 2 | C3 | Turbo LED | CN6/pins |
| | | | 12 & 13 |
|---------------+----------+--------------------+------------|
| Serial port 1 | C4 | Turbo switch | CN6/pins |
| | | | 15 - 17 |
|---------------+----------+--------------------+------------|
| PS/2 mouse | C5 | Reset switch | CN6/pins |
| port | | | 19 & 20 |
|---------------+----------+--------------------+------------|
| Ethernet | C6 | Power LED & | CN7/pins 1 |
| 10BaseT | | keylock | - 4 |
| connector | | | |
|---------------+----------+--------------------+------------|
| VGA feature | CN1 | Reset switch | CN7/pins 6 |
| connector | | | & 7 |
|---------------+----------+--------------------+------------|
| IDE interface | CN2 | IDE interface LED | CN8 |
| 1 | | | |
|---------------+----------+--------------------+------------|
| IDE interface | CN3 | Network/multimedia | CN10 |
| 2 | | interface | |
|---------------+----------+--------------------+------------|
| Floppy drive | CN4 | Riser slot | SL1 |
| interface | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | CN9 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | BIOS type select Acer | JP1 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | BIOS type select OEM | JP1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Password disabled | JP2 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Password enabled | JP2 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | BIOS type select flash | JP3 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | BIOS type select EPROM | 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 |
|---+---------------------------------+-------+--------------|
| » | Reset function | JP15 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Suspend mode function | JP15 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Detects hard drive access only | JP19 | Open |
|---+---------------------------------+-------+--------------|
| | Detects hard drives & floppy | JP19 | Closed |
| | drive accesses | | |
|---+---------------------------------+-------+--------------|
| » | Flash BIOS write protect | JP20 | Pins 2 & 3 |
| | disabled | | closed |
|---+---------------------------------+-------+--------------|
| | Flash BIOS write protect | JP20 | Pins 1 & 2 |
| | enabled | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON'T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 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 |
|------------------+--------------------+--------------------|
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 256KB | (8) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (2) 256K x 16 | None |
|------------------+--------------------+--------------------|
| 2MB | (2) 256K x 16 | (2) 256K x 16 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP8 |
|----------------------------+-------------------------------|
| 75MHz | Pins 1 & 4 closed |
|----------------------------+-------------------------------|
| 90MHz | Pins 2 & 5 closed |
|----------------------------+-------------------------------|
| 100MHz | Pins 3 & 6 closed |
|----------------------------+-------------------------------|
| 120MHz | Pins 2 & 5 closed |
|----------------------------+-------------------------------|
| 133MHz | Pins 3 & 6 closed |
|----------------------------+-------------------------------|
| 150MHz | Pins 2 & 5 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP12 |
|----------------------------+-------------------------------|
| AM K5 | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| CX M1 | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| Intel | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION (CX M1) |
|------------------------------------------------------------|
| Multiplier | JP14 | JP18 |
|------------------+--------------------+--------------------|
| 1.5x, 2x, 3x | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 1x | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 1.5x, 2x, 3x | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 1x | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION (AM K5) |
|------------------------------------------------------------|
| Multiplier | JP14 | JP18 |
|------------------+--------------------+--------------------|
| 1.5x, 2x, 3x | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 1x | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 1.5x, 2x, 3x | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 1x | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION (INTEL) |
|------------------------------------------------------------|
| Multiplier | JP14 | JP18 |
|------------------+--------------------+--------------------|
| 1.5x | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 2x | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 3x | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 2.5x | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP13 |
|----------------------------+-------------------------------|
| » | 3.3v | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| | 3.5v | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CN1 CONNECTOR SELECTION |
|------------------------------------------------------------|
| Setting | JP16 | JP17 |
|-----------------------+------------------+-----------------|
| » | Feature connector | Pins 1 & 2 | Pins 1 & 2 |
| | | closed | closed |
|---+-------------------+------------------+-----------------|
| | I2C connector | Pins 2 & 3 | Pins 2 & 3 |
| | | closed | closed |
+------------------------------------------------------------+