
EPSON, INC.

ACTION DESK 4000

Processor           80486SX/80487SX/80486DX/80486DX2
Processor Speed     25/33/50(internal)/66(internal)MHz
Chip Set            Unidentified
Video Chip Set      Cirrus Logic
Maximum Onboard     64MB
Memory
Maximum Video       2MB
Memory
Cache               64/128/256KB
BIOS                Unidentified
Dimensions          220mm x 220mm
I/O Options         Floppy drive interface, IDE interface, parallel port,
                    PS/2 mouse port, serial ports (2), VGA port, riser
                    slot
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Floppy drive interface      CN1      VGA port                    CN6

  PS/2 mouse port             CN2      IDE interface 1             CN7

  Serial port 1               CN3      Front panel connector       CN8

  Serial port 2               CN4      Turbo switch                J22

  Parallel port               CN5      Riser slot                  SL1

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     Parallel port LPT select LPT1            J5           Pins 1 & 2
                                                              closed

      Parallel port LPT select LPT2            J5           Pins 2 & 3
                                                              closed

     Serial port 1 COM select COM1            J6           Pins 1 & 2
                                                              closed

      Serial port 1 COM select COM3            J6           Pins 2 & 3
                                                              closed

     Serial port 2 COM select COM2            J7           Pins 1 & 2
                                                              closed

      Serial port 2 COM select COM4            J7           Pins 2 & 3
                                                              closed

     Floppy drive interface enabled           J8           Pins 1 & 2
                                                              closed

      Floppy drive interface disabled          J8           Pins 2 & 3
                                                              closed

     Turbo enabled                           J22              Open

      Turbo disabled                          J22             Closed

     Battery type select internal            J34           Pins 2 & 3
                                                              closed

      CMOS memory clear                       J34           Pins 3 & 4
                                                              closed

     IDE interface enabled                   J35           Pins 1 & 2
                                                              closed

      IDE interface disabled                  J35           Pins 2 & 3
                                                              closed

                   DRAM CONFIGURATION

       Size             Bank 0             Bank 1

       4MB            (1) 1M x 36           None

       5MB            (1) 1M x 36      (1) 256K x 36

       6MB            (1) 1M x 36      (1) 512K x 36

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

       8MB            (1) 2M x 36           None

       9MB            (1) 2M x 36      (1) 256K x 36

       10MB           (1) 2M x 36      (1) 512K x 36

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

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

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

       16MB           (1) 4M x 36           None

       17MB           (1) 4M x 36      (1) 256K x 36

       18MB           (1) 4M x 36      (1) 512K x 36

       20MB           (1) 4M x 36       (1) 1M x 36

       24MB           (1) 4M x 36       (1) 2M x 36

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

       32MB           (1) 8M x 36           None

       33MB           (1) 8M x 36      (1) 256K x 36

       34MB           (1) 8M x 36      (1) 512K x 36

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

       40MB           (1) 8M x 36       (1) 2M x 36

       48MB           (1) 4M x 36       (1) 8M x 36

       48MB           (1) 8M x 36       (1) 4M x 36

       64MB           (1) 8M x 36       (1) 8M x 36

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

                        CACHE CONFIGURATION

      Size            Bank 0           Bank 1             TAG

      64KB          (4) 8K x 8       (4) 8K x 8       (1) 8K x 8

      128KB         (4) 32K x 8         None          (1) 8K x 8

      256KB         (4) 32K x 8      (4) 32K x 8      (1) 32K x 8

  Note: The location of banks 0 & 1 and the TAG are unidentified.

                        CACHE JUMPER CONFIGURATION

    Size           J25            J26            J27             J28

    64KB        Pins 1 & 2     Pins 1 & 2        Open         Pins 2 & 3
                 closed          closed                        closed

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

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

                  VIDEO MEMORY CONFIGURATION

        Size                Bank 0               Bank 1

         1MB                 1MB                  None

         2MB                 1MB             (2) 256K x 16

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

           CPU SPEED SELECTION

        Speed                J16

        25MHz         Pins 5 & 6 closed

        33MHz         Pins 1 & 2 closed

       50iMHz         Pins 5 & 6 closed

       66iMHz         Pins 1 & 2 closed

                            CPU TYPE SELECTION

          Type                     J17                      J19

         80486SX            Pins 2 & 3 closed               Open

         80487SX             Pins 1 & 2, 3 & 4       Pins 2 & 3 closed
                                  closed

         80486DX             Pins 1 & 2, 3 & 4       Pins 1 & 2 closed
                                  closed

        80486DX2             Pins 1 & 2, 3 & 4       Pins 1 & 2 closed
                                  closed

