
EPSON, INC.

ACTION PC 2600, ACTION PC 5500

Processor  80846DX/CX486DX2/80486DX2/SL80486DX2/AM486DX4/
           80486DX4/P24D/P24T/CX M1SC
Processor  25/33/50(internal)/66(internal)/75(internal)/100(internal)/MHz
Speed
Chip Set   Unidentified
Video Chip Trident
Set
Maximum    132MB
Onboard
Memory
Maximum    1MB
Video
Memory
Cache      128/256KB
BIOS       Unidentified
Dimensions 330mm x 218mm
I/O        Floppy drive interface, IDE interfaces (2), parallel port, PS/2
Options    mouse port, serial ports (2), VGA feature connector, VGA port,
           riser slot
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  IDE interface 1             CN1      Serial port 1              CN11

  IDE interface 2             CN2      Serial port 2              CN12

  IDE interface LED           CN3      Parallel port              CN13

  Power LED                   CN4      Riser slot                  SL1

  PS/2 mouse port             CN8      VGA port                   VNC1

  Floppy drive interface     CN10      VGA feature connector      VNC3

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     CMOS memory normal operation         JP28        Pins 2 & 3 closed

      CMOS memory clear                    JP28        Pins 1 & 2 closed

     Factory configured - do not          JP29          Unidentified
      alter

     Factory configured - do not          JP34          Unidentified
      alter

     Factory configured - do not          JP35          Unidentified
      alter

     Factory configured - do not           VJ1          Unidentified
      alter

     Monitor type select interlaced        VJ3             Closed

      Monitor type select non               VJ3              Open
      interlaced

     Factory configured - do not           VJ4          Unidentified
      alter

     On board video enabled               VJP1        Pins 2 & 3 closed

      On board video disabled              VJP1        Pins 1 & 2 closed

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       4MB             4MB              None            None

       5MB             4MB         (1) 256K x 32        None

       6MB             4MB         (1) 256K x 32    (1) 256K x 32

       6MB             4MB         (1) 512K x 32        None

       8MB             4MB         (1) 512K x 32    (1) 512K x 32

       8MB             4MB          (1) 1M x 32         None

      12MB             4MB          (1) 1M x 32      (1) 1M x 32

      12MB             4MB          (1) 2M x 32         None

      20MB             4MB          (1) 2M x 32      (1) 2M x 32

      20MB             4MB          (1) 4M x 32         None

      36MB             4MB          (1) 4M x 32      (1) 4M x 32

      36MB             4MB          (1) 8M x 32         None

      68MB             4MB          (1) 8M x 32      (1) 8M x 32

      68MB             4MB          (1) 16M x 32        None

      132MB            4MB          (1) 16M x 32    (1) 16M x 32

  Note: Bank 0 is factory installed and is not configurable.

                    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

  Note: The location of banks 0 & 1 is unidentified.

                        CACHE JUMPER CONFIGURATION

      Size              JP19               JP20               JP21

      None            Pins 1 & 2        Pins 1 & 2      Pins 1 & 2 closed
                       closed             closed

      128KB           Pins 2 & 3        Pins 1 & 2      Pins 1 & 2 closed
                       closed             closed

      256KB           Pins 1 & 2        Pins 2 & 3      Pins 2 & 3 closed
                       closed             closed

                        VIDEO MEMORY CONFIGURATION

          Size                    Bank 0                   Bank 1

          512KB                   512KB                     None

           1MB                    512KB                    512KB

            Note: Bank 0 is factory installed and is not configurable.
            The size of the upgrade chips is unidentified.

                     CPU SPEED SELECTION

        Speed                JP24                 JP25

        25MHz          Pins 2 & 3 closed   Pins 2 & 3 closed

        33MHz          Pins 1 & 2 closed   Pins 1 & 2 closed

       50iMHz          Pins 2 & 3 closed   Pins 2 & 3 closed

       66iMHz          Pins 1 & 2 closed   Pins 1 & 2 closed

       75iMHz          Pins 2 & 3 closed   Pins 2 & 3 closed

       100iMHz         Pins 1 & 2 closed   Pins 1 & 2 closed

                            CPU TYPE SELECTION

      Type          JP1      JP2       JP3       JP4      JP5       JP6

     80486DX       1 & 2,   3 & 4     Open      2 & 3,   1 & 2     2 & 3
                   3 & 4                        4 & 5

    CX486DX2       1 & 2,   3 & 4     2 & 3     1 & 2,   1 & 2     2 & 3
                   3 & 4                        3 & 4

    80486DX2       1 & 2,   3 & 4     Open      2 & 3,   1 & 2     2 & 3
                   3 & 4                        4 & 5

   SL80486DX2      1 & 2,   3 & 4     Open      2 & 3,   1 & 2     2 & 3
                   3 & 4                        4 & 5

    AM486DX4       1 & 2,   3 & 4     Open      2 & 3,   1 & 2     2 & 3
                   3 & 4                        4 & 5

    80486DX4       1 & 2,   3 & 4     Open      2 & 3,   1 & 2     2 & 3
                   3 & 4                        4 & 5

      P24D         1 & 2,   3 & 4     Open      2 & 3,   1 & 2     2 & 3
                   3 & 4                        4 & 5

      P24T         1 & 2,   3 & 4     1 & 2     2 & 3,   1 & 2     2 & 3
                   3 & 4                        4 & 5

     CX M1SC       1 & 2,   3 & 4,    Open      2 & 3,   1 & 2     2 & 3
                   3 & 4    5 & 6               4 & 5

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CONT)

     Type        JP7      JP8       JP9       JP10      JP11       JP12

   80486DX      1 & 2     Open      Open      Open      Open      3 & 4

   CX486DX2     2 & 3     Open     2 & 3      1 & 2     Open      3 & 4

   80486DX2     2 & 3    1 & 2      Open      Open      1 & 2     3 & 4

  SL80486DX2    1 & 2     Open      Open      Open      Open      3 & 4

   AM486DX4     1 & 2     Open      Open      Open      Open      3 & 4

   80486DX4     1 & 2     Open      Open      Open      Open      3 & 4

     P24D       1 & 2    1 & 2      Open      Open      1 & 2     3 & 4

     P24T       1 & 2     Open     1 & 2      2 & 3     Open      2 & 3

   CX M1SC      1 & 2    1 & 2      Open      Open      1 & 2     3 & 4

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CONT)

     Type        JP13     JP14      JP22      JP23      JP32       JP33

   80486DX       Open     Open      1 & 2     1 & 2     Open       Open

   CX486DX2      Open     Open      1 & 2     2 & 3     Open       Open

   80486DX2      Open     1 & 2     1 & 2     1 & 2     Open       Open

  SL80486DX2     Open     Open      1 & 2     1 & 2     Open       Open

   AM486DX4      Open     Open      1 & 2     1 & 2     Open       Open

   80486DX4      Open     Open      1 & 2     1 & 2     Open       Open

     P24D        Open     1 & 2     1 & 2     1 & 2     Open       Open

     P24T        Open     Open      1 & 2     1 & 2     Open       Open

   CX M1SC       Open     1 & 2     1 & 2     2 & 3     Open      1 & 2

  Note: Pins designated should be in the closed position.

                     CPU VOLTAGE SELECTION

  Voltage     JP15      JP16       JP17       JP18      JP36

   3.3v       Open      Open      Closed     Closed    2 & 3

   3.45v      Open      Open      Closed     Closed    1 & 2

    5v       Closed    Closed      Open       Open      Open

  Note: Pins designated should be in the closed position.

                           DMA CHANNEL SELECTION

         Channel                   JP30                     JP31

              1             Pins 1 & 2 closed        Pins 1 & 2 closed

             3             Pins 2 & 3 closed        Pins 2 & 3 closed

