FRONTIER INDUSTRIAL, INC.

VLSI 82C486

Processor         80486SX/80486DX
Processor Speed   16/20/25/33MHz
Chip Set          VLSI
Max. Onboard DRAM 32MB
Cache             None
BIOS              Award
Dimensions        220mm x 220mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J3       Turbo LED                   J6

  Speaker                     J4       Power LED & keylock         J7

  Turbo switch                J5       Reset switch                JP1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation            JP2           pins 3 & 4
                                                              closed

      CMOS memory clear                       JP2           pins 1 & 2
                                                              closed

              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

      20MB        (4) 1M x 9      (4) 4M x 9

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

                          CPU TYPE CONFIGURATION

     Type        OSC1 (MHz)        JP3            JP4            JP5

  80486SX-16       33MHz        pins 2 & 3     pins 1 & 2       Open
                                 closed         closed

  80486SX-20       40MHz        pins 2 & 3     pins 1 & 2       Open
                                 closed         closed

  80486SX-25       50MHz        pins 2 & 3     pins 1 & 2       Open
                                 closed         closed

  80486DX-25       50MHz        pins 1 & 2     pins 2 & 3     pins 1 & 2
                                 closed         closed         closed

  80486DX-33       66MHz        pins 1 & 2     pins 2 & 3     pins 1 & 2
                                 closed         closed         closed