MULTIBEST INDUSTRIAL & MANUFACTURING, INC.

MB486SX1


Processor           80486SX/80487SX/80486DX/80486DX2
Processor Speed     20/25/33/50(internal)/66(internal)MHz
Chip Set            OPTI
Max. Onboard DRAM   32MB
Cache               None
BIOS                AMI
Dimensions          330mm x 218mm
I/O Options         None
NPU Options         None


[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Turbo LED                   CR1       Speaker                    J20

  External battery             J1       Turbo switch               JP6

  Power LED & keylock         J19       Reset switch               SW1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation             JP1           pins 2 & 3
                                                              closed

      CMOS memory clear                        JP1           pins 1 & 2
                                                              closed

  »   Monitor type select color                JP2            closed

      Monitor type select monochrome           JP2             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

      5MB         (4) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

      32MB        (4) 4M x 9      (4) 4M x 9

                             CPU CONFIGURATION

       Type                JP3               JP4                JP5

      80486SX             Open            pins 2 & 3           Open
                                            closed

      80487SX           pins 1 & 2        pins 1 & 2          Closed
                         closed             closed

      80486DX           pins 1 & 2        pins 1 & 2          Closed
                         closed             closed

     80486DX2           pins 1 & 2        pins 1 & 2          Closed
                         closed             closed