EPSON, INC.

EXPRESS STATION

Processor               80486SX/80487SX/80486DX
Processor Speed         25/33MHz
Chip Set                Unidentified
Video Chip Set          Unidentified
Maximum Onboard Memory  32MB
Maximum Video Memory    1MB
Cache                   128KB
BIOS                    Unidentified
Dimensions              254mm x 218mm
I/O Options             AUI connector, Twisted Pair connector, floppy drive
                        interface, SCSI interface, parallel port, PS/2
                        mouse port, serial ports (3), VGA feature
                        connector, VGA port, riser slot
NPU Options             None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Floppy drive interface      CN2      PS/2 mouse port             J8

  Serial port 1               J1       VGA port                    J16

  Power connector             J2       Twisted Pair connector      J17

  Serial port                 J4       AUI connector               J18

  Serial port                 J4A      VGA feature connector       J20

  Parallel port               J6A      Riser slot                  SL1

  SCSI interface              J6B

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

  ?   Floppy drive write protect            J3         Pins 4 & 6 closed
      disabled

      Floppy drive write protect            J3         Pins 2 & 4 closed
      enabled

  ?   Factory configured - do not           J10          Unidentified
      alter

  ?   On board video enabled                J19        Pins 2 & 4 closed

      On board video disabled               J19        Pins 4 & 6 closed

  ?   Password normal operation             J21        Pins 4 & 6 closed

      Password clear                        J21        Pins 2 & 4 closed

  ?   CMOS memory normal operation          J21       Pins 11 & 13 closed

      CMOS memory clear                     J21       Pins 9 & 11 closed

  ?   Flash BIOS normal operation           J21       Pins 10 & 12 closed

      Flash BIOS recovery mode              J21       Pins 12 & 14 closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (1) 256K x        None           None           None
                    36

     2MB        (1) 512K x        None           None           None
                    36

     2MB        (1) 256K x     (1) 256K x        None           None
                    36             36

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

     4MB        (1) 512K x     (1) 512K x        None           None
                    36             36

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

     8MB       (1) 2M x 36        None           None           None

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

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

     16MB      (1) 2M x 36    (1) 2M x 36        None           None

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

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

                            CACHE CONFIGURATION

               Size                                 CN3

               None                            Not installed

              128KB                 Intel 485 TurboCache module installed

                        VIDEO MEMORY CONFIGURATION

          Size                    Bank 0                   Bank 1

          512KB                   512KB                     None

           1MB                    512KB                 (4) 256K x 4

  Note: Bank 0 is factory installed and is not configurable. The location
  is unidentified.

    VIDEO MEMORY JUMPER CONFIGURATION

        Size                 J19

        512KB         Pins 1 & 3 closed

         1MB          Pins 3 & 5 closed

                         FLASH BIOS CONFIGURATION

           Setting                     J5                    J21

  »        Write protect        Pins 2 & 4 closed     Pins 1 & 3 closed
             disabled

       Write protect enabled    Pins 4 & 6 closed     Pins 3 & 5 closed