
MODULAR CIRCUIT TECHNOLOGY

MCT 486 ISA

Processor         80486SX/80486DX/80486DX2
Processor Speed   33/50/66(internal)MHz
Chip Set          VIA
Max. Onboard DRAM 128MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Turbo LED                   J7       Speaker                     J10

  Turbo switch                J8       Power LED & keylock         J11

  Reset switch                J9

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

     Factory configured - do not alter         J2             Open

     Monitor type select                       J3             Open
      monochrome/color

      Monitor type select color only            J3            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

      17MB        (4) 256K x 9    (4) 4M x 9

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

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

      64MB        (4) 16M x 9        NONE

      65MB        (4) 256K x 9   (4) 16M x 9

      68MB        (4) 1M x 9     (4) 16M x 9

      80MB        (4) 4M x 9     (4) 16M x 9

     128MB        (4) 16M x 9    (4) 16M x 9

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (M1)       TAG (M2)

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 32K x 8       NONE

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

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

                  CACHE JUMPER CONFIGURATION

        Size                 JS1                  JS2

        64KB           pins 1 & 2 closed   pins 1 & 2 closed

        128KB          pins 1 & 2 closed   pins 2 & 3 closed

        256KB          pins 2 & 3 closed   pins 2 & 3 closed

                          CPU TYPE CONFIGURATION

      Type           JC1            JC2           JC3            JC4

      4167        pins 1 & 2     pins 1 & 2    pins 2 & 3     pins 2 & 3
                    closed        closed         closed         closed

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

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

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

                CPU CLOCK SPEED CONFIGURATION

        Speed                JK1                  JK2

         1x            pins 2 & 3 closed   pins 2 & 3 closed

         2x            pins 1 & 2 closed   pins 1 & 2 closed

