ACER, INC.
==========

   V20-486 ALL IN ONE

Processor  AM486/80486SX/80486DX/80486DX2/80486DX4/P24D/P24T             
Processor  25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz 
Speed      
Chip Set   ALI                                                           
Video Chip None                                                          
Set        
Maximum    Unidentified                                                  
Onboard    
Memory     
Maximum    None                                                          
Video      
Memory     
Cache      128/256/512KB                                                 
BIOS       Acer                                                          
Dimensions 330mm x 218mm                                                 
I/O        32-bit VESA local bus slot, 32-bit PCI slots (2), floppy      
Options    drive interface, green PC connector, IDE interfaces (2),      
           parallel port, PS/2 mouse port, serial ports (2)              
NPU        None                                                          
Options    

<gopher://bitreich.org/I/th99/m/A-B/34198-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        | Location  | Purpose         |  Location   |
   |----------------+-----------+-----------------+-------------|
   | Serial port 2  |    CN1    | Reset switch    | CN9 pins 7  |
   |                |           |                 |     & 8     |
   |----------------+-----------+-----------------+-------------|
   | Serial port 1  |    CN2    | Power LED &     | CN10 pins 1 |
   |                |           | keylock         |     - 5     |
   |----------------+-----------+-----------------+-------------|
   | Parallel port  |    CN3    | Speaker         | CN10 pins 7 |
   |                |           |                 |    - 10     |
   |----------------+-----------+-----------------+-------------|
   | Floppy drive   |    CN4    | Turbo LED       |  CN10 pins  |
   | interface      |           |                 |   12 & 13   |
   |----------------+-----------+-----------------+-------------|
   | IDE interface  |    CN5    | Turbo switch    |  CN10 pins  |
   | 1              |           |                 |   15 - 17   |
   |----------------+-----------+-----------------+-------------|
   | IDE interface  |    CN6    | Reset switch    |  CN10 pins  |
   | 2              |           |                 |   19 & 20   |
   |----------------+-----------+-----------------+-------------|
   | PS/2 mouse     |    CN7    | 32-bit PCI      | PC11 - PC3  |
   | port           |           | slots           |             |
   |----------------+-----------+-----------------+-------------|
   | IDE interface  |    CN8    | 32-bit VESA     |     SL1     |
   | LED            |           | local bus slot  |             |
   |----------------+-----------+-----------------+-------------|
   | Power LED &    | CN9 pins  |                 |             |
   | keylock        |   1 - 4   |                 |             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Label |  Position  |
   |---------------------------------------+-------+------------|
   |>> | Password enabled                  |  J1   | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Password disabled                 |  J1   | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | BIOS type select Acer             |  J2   | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | BIOS type select OEM              |  J2   | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  J3   | Pins 3 & 4 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  J4   |   Closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  J6   | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  J7   | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | M5115 I/O enabled                 |  J8   | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | M5115 I/O disabled                |  J8   | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  J10  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Local bus IDE I/O address select  |  J11  | Pins 1 & 2 |
   |   | 0FXH                              |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Local bus IDE I/O address select  |  J11  | Pins 2 & 3 |
   |   | 07XH                              |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Local bus IDE enabled             |  J12  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Local bus IDE disabled            |  J12  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Reset switch enabled              |  J23  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Reset switch disabled             |  J23  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Green PC connector disabled       |  J24  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Green PC connector enabled        |  J24  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Note: The maximum amount of memory is unidentified.        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |      TAG      |
   |------------+---------------+---------------+---------------|
   |   128KB    |  (4) 32K x 8  |     None      |  (1) 32K x 8  |
   |------------+---------------+---------------+---------------|
   |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (1) 32K x 8  |
   |------------+---------------+---------------+---------------|
   |   512KB    | (4) 128K x 8  |     None      |  (1) 32K x 8  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |       J13       |       J15       |      J16       |
   |-------+-----------------+-----------------+----------------|
   | 128KB |   Pins 2 & 3    |   Pins 2 & 3    |   Pins 1 & 2   |
   |       |     closed      |     closed      |     closed     |
   |-------+-----------------+-----------------+----------------|
   | 256KB |   Pins 2 & 3    |   Pins 1 & 2    |   Pins 2 & 3   |
   |       |     closed      |     closed      |     closed     |
   |-------+-----------------+-----------------+----------------|
   | 512KB |   Pins 1 & 2    |   Pins 1 & 2    |   Pins 1 & 2   |
   |       |     closed      |     closed      |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   |      Speed       |        JP17        |        JP21        |
   |------------------+--------------------+--------------------|
   |      25MHz       | Pins 1 & 5 closed  | Pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      33MHz       | Pins 2 & 6 closed  | Pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      50iMHz      | Pins 1 & 5 closed  | Pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      66iMHz      | Pins 2 & 6 closed  | Pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      75iMHz      | Pins 1 & 5 closed  | Pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |     100iMHz      | Pins 2 & 6 closed  | Pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CPU TYPE SELECTION                     |
   |------------------------------------------------------------|
   |       Type       |         J9         |        J20         |
   |------------------+--------------------+--------------------|
   |  Intel S-series  | Pins 2 & 3 closed  | Pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |       P24D       | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |       P24T       | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CPU TYPE SELECTION                     |
   |------------------------------------------------------------|
   |       Type       |        J26         |        J27         |
   |------------------+--------------------+--------------------|
   |      Intel       | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |       AMD        | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU MULTIPLIER SELECTION                  |
   |------------------------------------------------------------|
   |         Multiplier         |              J22              |
   |----------------------------+-------------------------------|
   |             2x             |       Pins 3 & 4 closed       |
   |----------------------------+-------------------------------|
   |            2.5x            |       Pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |             3x             |       Pins 1 & 2 closed       |
   +------------------------------------------------------------+