EPSON, INC.

EQUITY 386DX/25 PLUS

Processor                  80386DX
Processor Speed            25MHz
Chip Set                   Unidentified
Video Chip Set             Chips and Technology
Maximum Onboard Memory     16MB
Maximum Video Memory       Unidentified
Cache                      32KB
BIOS                       Epson
Dimensions                 355mm x 304mm
I/O Options                Floppy drive interface, IDE interface, parallel
                           port, PS/2 mouse port, serial port, VGA port
NPU Options                80387DX/3167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  PS/2 mouse port             CN1      Speaker                    CN12

  VGA port                    CN3      LED connector              CN13

  Serial port                 CN4      Power LED                  CN14

  Parallel port               CN5      Floppy drive interface     CN15

  IDE interface LED          CN11      IDE interface              CN16

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

  »   IOCHRDY signal normal                 J1         Pins 2 & 3 closed

      IOCHRDY signal early                  J1         Pins 1 & 2 closed

  »   Factory configured – do not           J9           Unidentified
      alter

  »   Internal mouse port enabled           J10        Pins 1 & 2 closed

      Internal mouse port disabled          J10        Pins 2 & 3 closed

  »   External mouse port enabled           J11        Pins 2 & 3 closed

      External mouse port disabled          J11        Pins 1 & 2 closed

  »   Monitor type select color             J12        Pins 1 & 2 closed

      Monitor type select monochrome        J12        Pins 2 & 3 closed

  »   Password disabled                     J13        Pins 1 & 2 closed

      Password enabled                      J13        Pins 2 & 3 closed

  »   On board video enabled                J14        Pins 1 & 2 closed

      On board video disabled               J14        Pins 2 & 3 closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (4) 256K x 9      None           None           None

     2MB        (4) 256K x 9   (4) 256K x 9      None           None

     3MB        (4) 256K x 9   (4) 256K x 9   (4) 256K x 9      None

   4MB (A)      (4) 256K x 9   (4) 256K x 9   (4) 256K x 9  (4) 256K x 9

   4MB (B)      (4) 1M x 9        None           None           None

     6MB        (4) 256K x 9   (4) 256K x 9   (4) 1M x 9        None

     8MB        (4) 1M x 9     (4) 1M x 9        None           None

     9MB        (4) 1M x 9     (4) 1M x 9     (4) 256K x 9      None

     10MB       (4) 256K x 9   (4) 256K x 9   (4) 1M x 9     (4) 1M x 9

     10MB       (4) 1M x 9     (4) 1M x 9     (4) 256K x 9  (4) 256K x 9

     12MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9        None

     16MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

                   DRAM JUMPER CONFIGURATION

   Size        J4        J5         J6         J7        J8

    1MB      2 & 3      2 & 3     2 & 3      2 & 3     2 & 3

    2MB      2 & 3      1 & 2     2 & 3      2 & 3     2 & 3

    3MB      2 & 3      1 & 2     2 & 3      2 & 3     1 & 2

  4MB (A)    2 & 3      1 & 2     2 & 3      1 & 2     1 & 2

  4MB (B)    1 & 2      2 & 3     2 & 3      2 & 3     2 & 3

    6MB      2 & 3      1 & 2     1 & 2      2 & 3     1 & 2

    8MB      1 & 2      1 & 2     2 & 3      2 & 3     2 & 3

    9MB      1 & 2      1 & 2     2 & 3      2 & 3     1 & 2

   10MB      2 & 3      1 & 2     1 & 2      1 & 2     1 & 2

   10MB      1 & 2      1 & 2     2 & 3      1 & 2     1 & 2

   12MB      1 & 2      1 & 2     1 & 2      2 & 3     1 & 2

   16MB      1 & 2      1 & 2     1 & 2      1 & 2     1 & 2

  Note: Pins designated should be in the closed position.

                    BASE MEMORY SELECTION

        Size                  J2                   J3

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

        512KB          Pins 1 & 2 closed   Pins 2 & 3 closed

        640KB          Pins 1 & 2 closed   Pins 1 & 2 closed

                            CACHE CONFIGURATION

  Note: Board is factory installed with 32KB cache and is not
  configurable.

               VIDEO MEMORY CONFIGURATION

  Note: The size of the video memory is unidentified.