
UNIDENTIFIED

4386-VC-HD

Processor        80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed  20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set         VIA
Max. Onboard DRAM128MB
Cache            64/128/256KB
BIOS             AMI/Award

Dimensions       330mm x 218mm
I/O Options      None
NPU Options      80387DX

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Turbo LED                   J5       Speaker                     J8

  Turbo switch                J6       Power LED & keylock         J9

  Reset switch                J7

                        USER CONFIGURABLE SETTINGS

                 Function                      Jumper         Position

     CMOS memory normal operation               J1             Open

      CMOS memory clear                          J1            Closed

     Monitor type select                        J2             Open
      monochrome/EGA/VGA

      Monitor type select color                  J2            Closed

     NPU synchronous with CPU                  J40          pins 1 & 2
                                                               closed

      NPU asynchronous with CPU                 J40          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

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

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

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

         4MB                (4) 1M x 9               NONE

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

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

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

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

         16MB               (4) 4M x 9               NONE

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

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

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

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

         64MB              (4) 16M x 9               NONE

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

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

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

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

  Note: 16M x 4 SIMMs can only be used if an 80486 is installed.

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1          M10            TAG

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

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

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

  Note: M10 is optional and does not have to be installed.

                        CACHE JUMPER CONFIGURATION

    Size           JS1            JS2            JS3             JS4

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

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

    256KB       pins 2 & 3     pins 2 & 3     pins 1 & 2      pins 1 & 2
                 closed          closed         closed         closed

                       CPU SPEED/TYPE CONFIGURATION

        Type                JC1               JC2               JC3

     80386DX-33          pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed            closed            closed

     80386DX-40          pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed            closed            closed

     80486SX-20          pins 2 & 3        pins 2 & 3          Open
                          closed            closed

     80486SX-25          pins 2 & 3        pins 2 & 3          Open
                          closed            closed

     80486SX-33          pins 2 & 3        pins 2 & 3          Open
                          closed            closed

     80487SX-20          pins 1 & 2        pins 1 & 2        pins 2 & 3
                          closed            closed            closed

     80487SX-25          pins 1 & 2        pins 1 & 2        pins 2 & 3
                          closed            closed            closed

     80486DX-20          pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed            closed            closed

     80486DX-25          pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed            closed            closed

     80486DX-33          pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed            closed            closed

     80486DX-50          pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed            closed            closed

     80486DX2-50         pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed            closed            closed

     80486DX2-66         pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed            closed            closed

                   CPU SPEED/TYPE CONFIGURATION (CONT)

       Type            JK1           JK2           JK3            JK4

    80386DX-33      pins 1 & 2    pins 1 & 2    pins 1 & 2     pins 2 & 3
                      closed        closed        closed        closed

    80386DX-40      pins 1 & 2    pins 1 & 2    pins 1 & 2     pins 2 & 3
                      closed        closed        closed        closed

    80486SX-20      pins 1 & 2    pins 1 & 2    pins 2 & 3     pins 1 & 2
                      closed        closed        closed        closed

    80486SX-25      pins 1 & 2    pins 1 & 2    pins 2 & 3     pins 1 & 2
                      closed        closed        closed        closed

    80486SX-33      pins 2 & 3    pins 2 & 3    pins 2 & 3     pins 1 & 2
                      closed        closed        closed        closed

    80487SX-20      pins 1 & 2    pins 1 & 2    pins 2 & 3     pins 1 & 2
                      closed        closed        closed        closed

    80487SX-25      pins 1 & 2    pins 1 & 2    pins 2 & 3     pins 1 & 2
                      closed        closed        closed        closed

    80486DX-20      pins 1 & 2    pins 1 & 2    pins 2 & 3     pins 1 & 2
                      closed        closed        closed        closed

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

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

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

   80486DX2-50      pins 1 & 2    pins 1 & 2    pins 2 & 3     pins 1 & 2
                      closed        closed        closed        closed

   80486DX2-66      pins 2 & 3    pins 2 & 3    pins 2 & 3     pins 1 & 2
                      closed        closed        closed        closed

