
AMERICAN RESEARCH CORPORATION

386S

Processor            80386DX
Processor Speed      16/20MHz
Chip Set             Unknown
Max. Onboard DRAM    8MB
Cache                None
BIOS                 Phoenix
Dimensions           333mm x 305mm
I/O Options          32-bit external memory card slots (2), MIPS meter
                     connector
NPU Options          80387

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  MIPS meter                  CON1      Speaker                   CON5

  External battery            CON2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color                J9            pins 1 & 2
                                                              closed

      Monitor type select monochrome           J9            pins 2 & 3
                                                              closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

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

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

                            DRAM CONFIGURATION

   Size         Bank 0         Bank 1          Slot S1        Slot S2

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

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

    6MB      (4) 256K x 9    (4) 256K x 9        2MB            2MB

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

   10MB       (4) 1M x 9     (4) 1M x 9          2MB            NONE

  12MB 1      (4) 1M x 9     (4) 1M x 9          2MB            2MB

  12MB 2     (4) 256K x 9    (4) 256K x 9        8MB            2MB

   16MB       (4) 1M x 9     (4) 1M x 9          8MB            NONE

                         DRAM JUMPER CONFIGURATION

   Size           J3             J4              J5              J6

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

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

    6MB       pins 1 & 2      pins 1 & 2     pins 2 & 3      pins 2 & 3
                closed         closed          closed          closed

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

   10MB       pins 1 & 2      pins 2 & 3     pins 2 & 3      pins 1 & 2
                closed         closed          closed          closed

  12MB 1      pins 1 & 2      pins 1 & 2     pins 2 & 3      pins 1 & 2
                closed         closed          closed          closed

  12MB 2      pins 1 & 2      pins 1 & 2     pins 1 & 2      pins 2 & 3
                closed         closed          closed          closed

   16MB       pins 1 & 2      pins 1 & 2     pins 1 & 2      pins 1 & 2
                closed         closed          closed          closed

  Note 1 :Use this setting when 2MB is installed on board and in slot S1
  and S2.

  Note 2 :Use this setting when 2MB is installed on board and in slot S1,
  and 8MB is installed in slot S2.

         NPU CONFIGURATION

  Setting       J1          J2

  Disabled     Open       Closed

  Enabled     Closed       Open

                      BIOS CONFIGURATION

        Size                  J7                   J8

        27128          pins 1 & 2 closed   pins 1 & 2 closed

        27256          pins 2 & 3 closed   pins 1 & 2 closed

        27512          pins 2 & 3 closed   pins 2 & 3 closed

