
SAMSUNG ELECTRONICS AMERICA, INC.

SD820

Processor         80386SX
Processor Speed   25MHz
Chip Set          Unidentified
Max. Onboard DRAM 8MB
Cache             64KB
BIOS              Phoenix
Dimensions        330mm x 218mm
I/O Options       32-bit external memory slots (2)
NPU Options       80387SX/3167

[Image]

                                CONNECTIONS

  Purpose               Location      Purpose                 Location

  Serial port 1            J1         Reset switch               J24

  Serial port 2            J2         Speaker                    J25

  Parallel port            J4         Front panel                J26
                                      connector

  Serial port header       J5         32-bit external         SL1 & SL2
                                      memory card slots

  Serial port header       J6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Printer acknowledge type select          J7            pins 2 & 3
      trailing edge                                           closed

      Printer acknowledge type select          J7            pins 1 & 2
      leading edge                                            closed

     Parallel printer port enabled            J8            pins 1 & 2
      (LPT 1)                                                 closed

      Parallel printer port disabled           J8            pins 2 & 3
      (LPT 1)                                                 closed

     Parallel printer port disabled           J9            pins 2 & 3
      (LPT 2)                                                 closed

      Parallel printer port enabled            J9            pins 1 & 2
      (LPT 2)                                                 closed

     Serial port enabled (COM 1 & COM      J10 & J11        pins 1 & 2
      2)                                                      closed

      Serial port disabled (COM 1 & COM     J10 & J11        pins 2 & 3
      2)                                                      closed

     Monitor type select color                J12           pins 2 & 3
                                                              closed

      Monitor type select monochrome           J12           pins 1 & 2
                                                              closed

     Factory configured - do not alter        J13             Open

     ROM size select 64K                      J14           pins 1 & 2
                                                              closed

      ROM size select 128K                     J14           pins 2 & 3
                                                              closed

     Factory configured - do not alter        J15             Open

     DRAM speed select 100 ns                 J22           pins 1 & 2
                                                              closed

      DRAM speed select 85 ns                  J22           pins 2 & 3
                                                              closed

     Factory configured - do not alter        J23             Open

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      8MB         (4) 1M x 9      (4) 1M x 9

                         DRAM JUMPER CONFIGURATION

    Size          J16             J17            J18             J19

    1MB        pins 2 & 3      pins 2 & 3     pins 2 & 3      pins 2 & 3
                 closed         closed          closed         closed

    2MB        pins 2 & 3      pins 1 & 2     pins 1 & 2      pins 2 & 3
                 closed         closed          closed         closed

    4MB        pins 1 & 2      pins 2 & 3     pins 2 & 3      pins 1 & 2
                 closed         closed          closed         closed

    8MB        pins 1 & 2      pins 1 & 2     pins 2 & 3      pins 1 & 2
                 closed         closed          closed         closed

                   DRAM TYPE CONFIGURATION

        Type                 J20                  J21

    Static column      pins 2 & 3 closed   pins 1 & 2 closed

   Fast page mode      pins 2 & 3 closed   pins 2 & 3 closed

  Standard RAS/CAS     pins 1 & 2 closed   pins 1 & 2 closed

