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

   AP5C

   Processor    Pentium                                           
   Processor    75/90/100/120/133MHz                              
   Speed        
   Chip Set     Intel                                             
   Max. Onboard 128MB                                             
   DRAM         
   Cache        256/512KB                                         
   BIOS         AMI                                               
   Dimensions   330mm x 218mm                                     
   I/O Options  Parallel port, serial ports (2), 32-bit PCI slots 
                (4), floppy drive interface, IDE interfaces (2),  
                green PC connector                                
   NPU Options  None                                              

<gopher://bitreich.org/I/th99/m/A-B/32907-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose            | Location | Purpose       |  Location  |
   |--------------------+----------+---------------+------------|
   | Parallel port      |   CN1    | Chassis fan   |    CN12    |
   |                    |          | power         |            |
   |--------------------+----------+---------------+------------|
   | Serial port 1      |   CN2    | Power LED &   | CN14 pins  |
   |                    |          | keylock       |   1 - 5    |
   |--------------------+----------+---------------+------------|
   | Serial port 2      |   CN3    | Speaker       | CN14 pins  |
   |                    |          |               |   7 - 10   |
   |--------------------+----------+---------------+------------|
   | Floppy drive       |   CN4    | Green PC LED  | CN14 pins  |
   | interface          |          |               |  12 - 13   |
   |--------------------+----------+---------------+------------|
   | IDE interface 2    |   CN5    | Green PC      | CN14 pins  |
   |                    |          | connector     |  15 - 17   |
   |--------------------+----------+---------------+------------|
   | IDE interface 1    |   CN6    | Reset switch  | CN14 pins  |
   |                    |          |               |   19- 20   |
   |--------------------+----------+---------------+------------|
   | IDE interface LED  |   CN7    | 32-bit PCI    | PC1 - PC4  |
   |                    |          | slots         |            |
   |--------------------+----------+---------------+------------|
   | Chassis fan power  |   CN11   |               |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | On board I/O enabled             |  JP5   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | On board I/O disabled            |  JP5   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | PS/2 mouse enabled (mouse is     |  JP6   |   Closed   |
   |   | optional & may not be present)   |        |            |
   |---+----------------------------------+--------+------------|
   |   | PS/2 mouse disabled (mouse is    |  JP6   |    Open    |
   |   | optional & may not be present)   |        |            |
   |---+----------------------------------+--------+------------|
   |   | Flash BIOS voltage select 5v     |  JP13  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Flash BIOS voltage select 12v    |  JP13  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP15  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP15  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM 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      |
   |------------+---------------+---------------+---------------|
   |    24MB    |  (2) 1M x 36  |  (2) 1M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    32MB    |  (2) 2M x 36  |  (2) 1M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    32MB    |  (2) 2M x 36  |  (2) 2M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    32MB    |  (2) 4M x 36  |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    40MB    |  (2) 2M x 36  |  (2) 2M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    40MB    |  (2) 4M x 36  |  (2) 1M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    48MB    |  (2) 4M x 36  |  (2) 1M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    48MB    |  (2) 4M x 36  |  (2) 2M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    56MB    |  (2) 4M x 36  |  (2) 2M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    64MB    |  (2) 4M x 36  |  (2) 4M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    64MB    |  (2) 8M x 36  |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    72MB    |  (2) 8M x 36  |  (2) 1M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    80MB    |  (2) 8M x 36  |  (2) 1M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    80MB    |  (2) 8M x 36  |  (2) 2M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    88MB    |  (2) 8M x 36  |  (2) 2M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    96MB    |  (2) 8M x 36  |  (2) 4M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |   104MB    |  (2) 8M x 36  |  (2) 4M x 36  |  (2) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |   112MB    |  (2) 8M x 36  |  (2) 2M x 36  |  (2) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |   128MB    |  (2) 8M x 36  |  (2) 4M x 36  |  (2) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |   128MB    |  (2) 8M x 36  |  (2) 8M x 36  |     NONE      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |        TAG         |
   |------------------+--------------------+--------------------|
   |      256KB       |    (8) 32K x 8     |    (1) 32K x 8     |
   |------------------+--------------------+--------------------|
   |      512KB       |    (8) 64K x 8     |    (1) 32K x 8     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |            Size            |             JP12              |
   |----------------------------+-------------------------------|
   |           256KB            |       pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |           512KB            |       pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             CACHE VOLTAGE JUMPER CONFIGURATION             |
   |------------------------------------------------------------|
   |        Type        |       JP14        |       JP16        |
   |--------------------+-------------------+-------------------|
   |        3.3v        |      All Off      |      All On       |
   |--------------------+-------------------+-------------------|
   |      3.3v/5v       |      All On       |      All Off      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   | Speed  |    JP9     |    JP10    |          JP11           |
   |--------+------------+------------+-------------------------|
   | 75MHz  | pins 1 & 2 | pins 1 & 2 |    pins 1 & 2, 3 & 4    |
   |        |   closed   |   closed   |         closed          |
   |--------+------------+------------+-------------------------|
   | 90MHz  | pins 2 & 3 | pins 1 & 2 |    pins 1 & 2 closed    |
   |        |   closed   |   closed   |                         |
   |--------+------------+------------+-------------------------|
   | 100MHz | pins 2 & 3 | pins 1 & 2 |    pins 3 & 4 closed    |
   |        |   closed   |   closed   |                         |
   |--------+------------+------------+-------------------------|
   | 120MHz | pins 2 & 3 | pins 2 & 3 |    pins 1 & 2 closed    |
   |        |   closed   |   closed   |                         |
   |--------+------------+------------+-------------------------|
   | 133MHz | pins 2 & 3 | pins 2 & 3 |    pins 3 & 4 closed    |
   |        |   closed   |   closed   |                         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DMA CONFIGURATION                      |
   |------------------------------------------------------------|
   |       DMA        |        JP3         |        JP4         |
   |------------------+--------------------+--------------------|
   |      DMA 1       | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      DMA 3       | pins 1 & 2 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+