ARNOS INSTRUMENTS & COMPUTER SYSTEMS, INC.

386SX-16-20-25

Processor         80386SX
Processor Speed   16/20/25MHz
Chip Set          None
Max. Onboard DRAM 8MB
Cache             None
BIOS              Quadtel
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            X6       Power LED & keylock         X14

  Turbo LED                   X11      Status display              X17

  Reset switch                X12      Speaker                     X21

  Turbo switch                X13

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   Battery installed < 5VDC               S1              pins 1 & 2
                                                               closed

      Battery installed > 5VDC               S1              pins 2 & 3
                                                               closed

  »   CPU speed select switchable            S2              pins 2 & 3
      at keyboard                                              closed

      CPU speed select switchable            S2              pins 1 & 2
      at turbo switch                                          closed

  »   Factory configured - do not           SW1/1               N/A
      alter

  »   NPU enabled                           SW1/2               Off

      NPU disabled                          SW1/2                On

  »   Normal CPU speed during               SW1/3               Off
      floppy operations

      Slow CPU speed to 8MHz                SW1/3                On
      during floppy operations

  »   Monitor type select                   SW1/4               Off
      monochrome

      Monitor type select color             SW1/4                On

  »   Factory configured - do not           SW1/5               N/A
      alter

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (2) 256K x 9   (2) 256K x 9      NONE           NONE

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

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

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

     6MB        (2) 1M x 9     (2) 1M x 9     (2) 1M x 9        NONE

     8MB        (2) 1M x 9     (2) 1M x 9     (2) 1M x 9     (2) 1M x 9

                        DRAM SWITCH CONFIGURATION

     Size        Banks used       SW1/6          SW1/7          SW1/8

      1MB          0 & 1            On            On             On

      2MB       0, 1, 2 & 3         On            Off            On

      2MB            0              On            Off            Off

      4MB          0 & 1           Off            On             On

      6MB         0, 1 & 2         Off            Off            On

      8MB       0, 1, 2 & 3        Off            Off            Off