
HEDAKA

HED-918

Processor         8088/V20
Processor Speed   4.77/10MHz
Chip Set          None
Max. Onboard DRAM 640KB
Cache             None
BIOS              AMI
Dimensions        217mm x 166mm
I/O Options       None
NPU Options       8087

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Power LED                  CN2       Turbo LED                   CN6

  Speaker                    CN3       External battery           CN7A

  Reset switch               CN4       Keylock                     CN8

  Turbo switch               CN5

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

     CPU type select Intel 8088             JP2             pins 1 & 2
                                                               closed

      CPU type select NEC V-20               JP2             pins 2 & 3
                                                               closed

     Factory configured - do not           SW1/1               Off
      alter

     NPU disabled                          SW1/2                On

      NPU enabled                           SW1/2               Off

                         DRAM CONFIGURATION

         Size               44256 Chips            411000 Chips

          0KB                   NONE                   NONE

         128KB                   U7                    NONE

         256KB                U6 & U7                  NONE

         384KB              U5, U6 & U7                NONE

         512KB            U4, U5, U6 & U7              NONE

         512KB                  NONE             U4, U5, U6 & U7

         640KB          U3, U4, U5, U6 & U7            NONE

         640KB                   U3              U4, U5, U6 & U7

                     DRAM JUMPER/SWITCH CONFIGURATION

       Size               JP1               SW1/3             SW1/4

       0KB          pins 1 & 2 closed        On                 On

      128KB         pins 1 & 2 closed        Off                On

      256KB         pins 1 & 2 closed        Off                On

      384KB         pins 1 & 2 closed        Off                On

      512KB         pins 1 & 2 closed        Off                On

      512KB         pins 2 & 3 closed        Off                On

      640KB         pins 1 & 2 closed        On                Off

      640KB         pins 2 & 3 closed        On                Off

                FLOPPY DRIVE CONFIGURATION

  Drives installed         SW1/7               SW1/8

         1                  On                  On

         2                  Off                 On

         3                  On                  Off

         4                  Off                 Off

              MONITOR CONFIGURATION

      Type            SW1/3            SW1/4

      None              On               On

  40 x 25 color        Off               On

  80 x 25 color         On              Off

   Monochrome          Off              Off

