
ILON USA, INC.

M-423

Processor         80486SX/80487SX/80486DX/80486DX2
Processor Speed   20/25/33/50(internal)MHz
Chip Set          PC Chips
Max. Onboard DRAM 32MB
Cache             32/64/128/256KB
BIOS              AMI
Dimensions        220mm x 220mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  External battery           JP1      Power LED & keylock         JP20

  Reset switch              JP17      Speaker                     JP21

  Turbo LED                 JP18      Weitek 4167 connector        W1

  Turbo switch              JP19

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color               JP2             Closed

      Monitor type select monochrome          JP2              Open

     Gate type select fast A20               JP3           pins 1 & 2
                                                              closed

      Gate type select keyboard A20           JP3           pins 2 & 3
                                                              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

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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     32KB        (4) 8K x 8        NONE       (1) 8K x 8

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8

     128KB      (4) 32K x 8        NONE       (1) 8K x 8

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8

         CACHE JUMPER WRITE-THROUGH CONFIGURATION

   Size      JP4       JP6      JP11      JP12     JP13

   32KB     2 & 3     2 & 3     2 & 3     2 & 3    2 & 3

   64KB     1 & 2     2 & 3     1 & 2     1 & 2    2 & 3

  128KB     1 & 2     1 & 2     1 & 2     1 & 2    1 & 2

  256KB     2 & 3     1 & 2     1 & 2     1 & 2    1 & 2

  Note: Pins designated should be in closed position.

         CACHE JUMPER WRITE-BACK CONFIGURATION

   Size        JP7        JP8         JP9       JP10

   32KB       1 & 2      2 & 3       2 & 3      2 & 3

   64KB       2 & 3      2 & 3       2 & 3      1 & 2

   128KB      2 & 3      2 & 3       1 & 2      2 & 3

   256KB      2 & 3      1 & 2       2 & 3      2 & 3

  Note: Pins designated should be in closed position.

                          CPU TYPE CONFIGURATION

       Type               JP14              JP15               JP16

      80486SX           pins 2 & 3          Open            pins 2 & 3
                         closed                               closed

      80487SX           pins 1 & 2        pins 2 & 3      pins 1 & 2, 3 &
                         closed            closed            4 closed

      80486DX           pins 1 & 2        pins 1 & 2      pins 1 & 2, 3 &
                         closed            closed            4 closed

     80486DX2           pins 1 & 2        pins 2 & 3      pins 1 & 2, 3 &
                         closed            closed            4 closed

         CPU SPEED CONFIGURATION

        Speed                JP5

        20MHz         pins 1 & 2 closed

        25MHz         pins 2 & 3 closed

        33MHz         pins 1 & 2 closed

       50iMHz         pins 2 & 3 closed

