
UNIDENTIFIED

4386-VC-V

Processor        80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2
Processor Speed  20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set         VIA
Max. Onboard DRAM64/128MB (depends on CPU installed)
Cache            32/64/128/256KB
BIOS             Award
Dimensions       330mm x 218mm
I/O Options      32-bit VESA local bus slots (2)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  Turbo LED                  J6        Speaker                     J9

  Turbo switch               J7        Power LED & keylock        J10

  Reset switch               J8        32-bit VESA local bus   SL1 & SL2
                                       slots

                        USER CONFIGURABLE SETTINGS

                 Function                      Jumper         Position

     Monitor type select                        J1             Open
      monochrome/EGA/VGA

      Monitor type select color                  J1            Closed

     CMOS memory normal operation               J2             Open

      CMOS memory clear                          J2            Closed

     Factory configured - do not alter         JC5             N/A

     Factory configured - do not alter         JC6             N/A

     Factory configured - do not alter         JK1             N/A

     NPU synchronous with CPU                  JN1          pins 1 & 2
                                                               closed

      NPU asynchronous with CPU                 JN1          pins 2 & 3
                                                               closed

  Note: The location of J1 & J2 are unidentified.

          DRAM CONFIGURATION (80386)

      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

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

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

      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

      64MB        (4) 16M x 9        NONE

          DRAM CONFIGURATION (80486)

      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

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

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

      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

      64MB        (4) 16M x 9        NONE

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

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

      DRAM CONFIGURATION (80486 CONT)

     Size          Bank 0        Bank 1

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

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

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

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

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

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1         TAG 0          TAG 1

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

     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: TAG 1 is alter RAM and may not be present.

                  CACHE JUMPER CONFIGURATION

  Size      JS1     JS2      JS3      JS4      JS5      JS6

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

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

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

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

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

    Type       JI0        JI1       JI2       JI3        JI4       JI5

  80386DX     2 & 3      2 & 3     2 & 3     2 & 3      2 & 3     2 & 3

  80486SX     1 & 2      1 & 2     1 & 2     1 & 2      1 & 2     1 & 2

  80487SX     1 & 2      1 & 2     1 & 2     1 & 2      1 & 2     1 & 2

  CX486DLC    2 & 3      2 & 3     2 & 3     2 & 3      2 & 3     2 & 3

  80486DX     1 & 2      1 & 2     1 & 2     1 & 2      1 & 2     1 & 2

  80486DX2    1 & 2      1 & 2     1 & 2     1 & 2      1 & 2     1 & 2

  Note: Pins desingated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

    Type        JI6      JI7      JC1      JC2       JC3          JC4

   80386DX     2 & 3    2 & 3    1 & 2    1 & 2     1 & 2        Open

   80486SX     1 & 2    1 & 2    2 & 3    2 & 3      Open        Open

   80487SX     1 & 2    1 & 2    1 & 2    1 & 2     2 & 3        Open

  CX486DLC     2 & 3    2 & 3    1 & 2    1 & 2     1 & 2      1 & 2, 3 &
                                                               4, 5 & 6

   80486DX     1 & 2    1 & 2    1 & 2    1 & 2     1 & 2        Open

  80486DX2     1 & 2    1 & 2    1 & 2    1 & 2     1 & 2        Open

  Note: Pins desingated should be in the closed position.

                          CPU SPEED CONFIGURATION

       Speed              JK2                JK3               JK4

       20MHz           pins 2 & 3         pins 2 & 3        pins 2 & 3
                         closed            closed             closed

       25MHz           pins 2 & 3         pins 2 & 3        pins 2 & 3
                         closed            closed             closed

   33MHz (80386 &      pins 2 & 3         pins 1 & 2        pins 2 & 3
      CX486)             closed            closed             closed

       33MHz           pins 1 & 2         pins 2 & 3        pins 1 & 2
                         closed            closed             closed

   40MHz (80386 &      pins 2 & 3         pins 1 & 2        pins 2 & 3
      CX486)             closed            closed             closed

      50iMHz           pins 2 & 3         pins 2 & 3        pins 2 & 3
                         closed            closed             closed

       50MHz           pins 1 & 2         pins 2 & 3        pins 2 & 3
                         closed            closed             closed

      66iMHz           pins 1 & 2         pins 2 & 3        pins 1 & 2
                         closed            closed             closed

      VESA WAIT STATE CONFIGURATION

     Wait states             JV2

    0 wait states     pins 1 & 2 closed

    1 wait state      pins 2 & 3 closed

         BUS SPEED CONFIGURATION

      CPU speed              JV1

      <= 33MHz        pins 1 & 2 closed

       > 33MHz        pins 2 & 3 closed

