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# ACER
V50LAN
Device Type Mainboard
Processor CX 6X86/AM K5/Pentium
Processor Speed 75/90/100/120/133/150/166MHz
Chip Set Intel
Video Chip Set ATI
Maximum Onboard 128MB (EDO supported)
Memory
Maximum Video 2MB
Memory
Cache 256KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options CD-ROM interface, Ethernet 10BaseT connector,
(backplane) floppy drive interface, green PC connector,
IDE interfaces (2), parallel port, PS/2 mouse
interface, PS/2 keyboard interface, serial
ports (2), VGA feature connector, VGA port,
riser slot, IR connector, line in, wavetable
connector, audio in - CD-ROM
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+---------------+--------------|
| PS/2 mouse | C2 | IDE interface | CN8 |
| interface | | 1 | |
|------------------+----------+---------------+--------------|
| Serial port 1 | C3 | IDE interface | CN9 |
| | | 2 | |
|------------------+----------+---------------+--------------|
| Serial port 2 | C4 | Floppy drive | CN10 |
| | | interface | |
|------------------+----------+---------------+--------------|
| Parallel port | C5 | Power LED & | CN17/pins |
| | | keylock | 1-5 |
|------------------+----------+---------------+--------------|
| VGA port | C6 | Speaker | CN17/pins |
| | | | 7-10 |
|------------------+----------+---------------+--------------|
| Audio connector | CN1 | Green PC LED | CN17/pins 12 |
| | | | & 13 |
|------------------+----------+---------------+--------------|
| ATI media | CN2 | Turbo switch | CN17/pins |
| connector | | | 15-17 |
|------------------+----------+---------------+--------------|
| Audio in - | CN3 | Reset switch | CN17/pins 19 |
| CD-ROM | | | & 20 |
|------------------+----------+---------------+--------------|
| Wavetable | CN4 | Hard disk LED | CN20 |
| connector | | connector | |
|------------------+----------+---------------+--------------|
| Line in - | CN5 | Fan connector | CN21 |
| internal | | | |
|------------------+----------+---------------+--------------|
| Fax/voice modem | CN6 | Riser slot | SL1 |
| line in | | | |
|------------------+----------+---------------+--------------|
| VGA/Ethernet | CN7 | | |
| feature | | | |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------+-----------+-------------------|
| » | Factory configured - | CN12 | Reserved |
| | do not alter | | |
|---+------------------------+-----------+-------------------|
| » | SMM switch enabled | CN16 | Pins 1 & 2 closed |
|---+------------------------+-----------+-------------------|
| | Reset switch enabled | CN16 | Pins 2 & 3 closed |
|---+------------------------+-----------+-------------------|
| » | Factory configured - | CN16/pins | Reserved |
| | do not alter | 3 & 4 | |
|---+------------------------+-----------+-------------------|
| » | BIOS type select Acer | JP2 | Pins 1 & 2 closed |
|---+------------------------+-----------+-------------------|
| | BIOS type select OEM | JP2 | Pins 2 & 3 closed |
|---+------------------------+-----------+-------------------|
| » | Password disabled | JP3 | Pins 2 & 3 closed |
|---+------------------------+-----------+-------------------|
| | Password enabled | JP3 | Pins 1 & 2 closed |
|---+------------------------+-----------+-------------------|
| » | Flash ROM boot block | JP4 | Pins 2 & 3 closed |
| | disabled | | |
|---+------------------------+-----------+-------------------|
| | Flash ROM boot block | JP4 | Pins 1 & 2 closed |
| | enabled | | |
|---+------------------------+-----------+-------------------|
| » | Factory configured - | JP13 | Reserved |
| | do not 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 |
|-----------------+-------------------+----------------------|
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS ROM TYPE SELECTION |
|------------------------------------------------------------|
| Function | JP5 |
|---------------------------------+--------------------------|
| » Flash ROM boot block disabled | Pins 3 & 4 closed |
|---------------------------------+--------------------------|
| Flash ROM boot block enabled | Pins 2 & 3 closed |
|---------------------------------+--------------------------|
| Reserved | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------|
| Note: The cache configuration is unidentified. |
+------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP7 | JP8 |
|----------------------------------+------------+------------|
| » 256KB asynchronous or pipeline | Pins 1 & 2 | Pins 1 & 2 |
| burst SRAM | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 (PENTIUM) |
|------------------------------------------------------------|
| CPU speed | Clock speed | JP6 | JP9 |
|-----------+-------------+---------------+------------------|
| 75MHz | 50MHz | Pins 1 & 4 | Pins 1 & 2 |
| | | closed | closed |
|-----------+-------------+---------------+------------------|
| 90MHz | 60MHz | Pins 2 & 5 | Pins 1 & 2 |
| | | closed | closed |
|-----------+-------------+---------------+------------------|
| 100MHz | 50MHz | Pins 1 & 4 | Pins 2 & 3 |
| | | closed | closed |
|-----------+-------------+---------------+------------------|
| 100MHz | 66MHz | Pins 3 & 6 | Pins 1 & 2 |
| | | closed | closed |
|-----------+-------------+---------------+------------------|
| 120MHz | 60MHz | Pins 2 & 5 | Pins 2 & 3 |
| | | closed | closed |
|-----------+-------------+---------------+------------------|
| 133MHz | 66MHz | Pins 3 & 6 | Pins 2 & 3 |
| | | closed | closed |
|-----------+-------------+---------------+------------------|
| 150MHz | 60MHz | Pins 2 & 5 | Pins 1 & 2 |
| | | closed | closed |
|-----------+-------------+---------------+------------------|
| 166MHz | 66MHz | Pins 3 & 6 | Pins 1 & 2 |
| | | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION (INTEL) |
|------------------------------------------------------------|
| Multiplier | JP10 | JP11 |
|--------------------+-------------------+-------------------|
| » 1.5x | Pins 1 & 2 closed | Pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| 2x | Pins 1 & 2 closed | Pins 2 & 3 closed |
|--------------------+-------------------+-------------------|
| 2.5x | Pins 2 & 3 closed | Pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| 3x | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION (AM K5) |
|------------------------------------------------------------|
| Multiplier | JP10 | JP11 |
|--------------------+-------------------+-------------------|
| » 3x | Pins 1 & 2 closed | Pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| 2x | Pins 1 & 2 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION (CX 6X86) |
|------------------------------------------------------------|
| Multiplier | JP10 | JP11 |
|--------------------+-------------------+-------------------|
| » 3x | Pins 1 & 2 closed | Pins 1 & 2 closed |
|--------------------+-------------------+-------------------|
| 2x | Pins 1 & 2 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP12 |
|------------------------------+-----------------------------|
| » 3.38v | Pins 1 & 2 closed |
|------------------------------+-----------------------------|
| 3.52v | Pins 2 & 3 closed |
+------------------------------------------------------------+