
ACER, INC.

AP53

Processor             Pentium
Processor Speed       75/90/100/120/133/150/166MHz
Chip Set              Intel
Video Chip Set        None
Maximum Onboard       512MB
Memory
Maximum Video Memory  None
Cache                 256KB
BIOS                  AMI
Dimensions            250mm x 220mm
I/O Options           32-bit PCI slots (4), floppy drive interface, green
                      PC connector, IDE interfaces (2), parallel port,
                      PS/2 mouse interface, serial ports (2)
NPU Options           None

[Image]

                                CONNECTIONS

  Purpose              Location     Purpose                   Location

  Serial port 2          CN1        Speaker                  CN8 pins 7 -
                                                                 10

  Serial port 1          CN2        Turbo/green PC LED      CN8 pins 12 &
                                                                 13

  Parallel port          CN3        Turbo switch/green PC   CN8 pins 15 -
                                    connector                    17

  Floppy drive           CN4        Reset switch            CN8 pins 19 &
  interface                                                      20

  IDE interface 2        CN5        Chassis fan power            CN9

  IDE interface 1        CN6        IDE interface LED           CN12

  PS/2 mouse             CN7        32-bit PCI slots          PC1 - PC4
  interface

  Power LED &         CN8 pins 1
  keylock                - 5

  Note: If connector for CN8 is 12-pin, connect red wire to pin 11.

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     PS/2 mouse IRQ12 enabled                JP4             Closed

      PS/2 mouse IRQ12 disabled               JP4              Open

     CMOS memory normal operation            JP5           Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP5           Pins 2 & 3
                                                              closed

     On board I/O controller enabled         JP8           Pins 1 & 2
                                                              closed

      On board I/O controller disabled        JP8           Pins 2 & 3
                                                              closed

     Keyboard clock select ISA clock        JP1401         Pins 1 & 2
                                                              closed

      Keyboard clock select 12MHz            JP1401         Pins 3 & 4
      clock                                                   closed

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       4MB        (2) 512K x 36         None

       8MB         (2) 1M x 36          None

       8MB        (2) 512K x 36    (2) 512K x 36

      12MB        (2) 512K x 36     (2) 1M x 36

      16MB         (2) 2M x 36          None

      16MB         (2) 1M x 36      (2) 1M x 36

      20MB        (2) 512K x 36     (2) 2M x 36

      24MB         (2) 1M x 36      (2) 2M x 36

      32MB         (2) 4M x 36          None

      32MB         (2) 2M x 36      (2) 2M x 36

      36MB        (2) 512K x 36     (2) 4M x 36

      40MB         (2) 1M x 36      (2) 4M x 36

      48MB         (2) 2M x 36      (2) 4M x 36

      64MB         (2) 8M x 36          None

      64MB         (2) 4M x 36      (2) 4M x 36

      68MB        (2) 512K x 36     (2) 8M x 36

      72MB         (2) 1M x 36      (2) 8M x 36

      80MB         (2) 2M x 36      (2) 8M x 36

      96MB         (2) 4M x 36      (2) 8M x 36

      128MB        (2) 8M x 36      (2) 8M x 36

          DRAM CONFIGURATION (CONT)

      Size          Bank 0          Bank 1

     128MB        (2) 16M x 36       None

     136MB        (2) 1M x 36    (2) 16M x 36

     144MB        (2) 2M x 36    (2) 16M x 36

     160MB        (2) 4M x 36    (2) 16M x 36

     256MB        (2) 16M x 36   (2) 16M x 36

     256MB        (2) 32M x 36       None

     264MB        (2) 1M x 36    (2) 32M x 36

     272MB        (2) 2M x 36    (2) 32M x 36

     288MB        (2) 4M x 36    (2) 32M x 36

     320MB        (2) 8M x 36    (2) 32M x 36

     384MB        (2) 16M x 36   (2) 32M x 36

     512MB        (2) 32M x 36   (2) 32M x 36

      CACHE CONFIGURATION

      Size          Bank 0

     256KB       (2) 32K x 32

                            CPU SPEED SELECTION

         Speed                     JP1                     JP10

         75MHz              Pins 1 & 2, 3 & 4        Pins 1 & 2, 3 & 4
                                 closed                   closed

         90MHz              Pins 1 & 2 closed        Pins 1 & 2, 3 & 4
                                                          closed

         100MHz             Pins 3 & 4 closed        Pins 1 & 2, 3 & 4
                                                          closed

         120MHz             Pins 1 & 2 closed        Pins 3 & 4, 5 & 6
                                                          closed

         133MHz             Pins 3 & 4 closed        Pins 3 & 4, 5 & 6
                                                          closed

         150MHz             Pins 1 & 2 closed        Pins 5 & 6, 7 & 8
                                                          closed

         166MHz             Pins 3 & 4 closed        Pins 5 & 6, 7 & 8
                                                          closed

          CPU VOLTAGE SELECTION

       Voltage               JP11

        3.45v         Pins 1 & 2 closed

        3.52v         Pins 3 & 4 closed

                           DMA CHANNEL SELECTION

         Channel                   JP6                      JP7

              1             Pins 2 & 3 closed        Pins 2 & 3 closed

             3             Pins 1 & 2 closed        Pins 1 & 2 closed

                       FLASH BIOS VOLTAGE SELECTION

         Voltage                  JP1301                   JP1302

             5v             Pins 1 & 2 closed       Pins 1 & 2 closed

             12v             Pins 2 & 3 closed       Pins 1 & 2 closed

