NIC TECHNOLOGY, INC.

SIH433B

Processor           80486SX/80487SX/80486DX/ODP486SX
Processor Speed     16/20/25/33/50(internal)/50/66(internal)MHz
Chip Set            UNI
Max. Onboard DRAM   32MB
Cache               32/64/128/256KB
BIOS                AMI
Dimensions          218mm x 218mm
I/O Options         None
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J1       Turbo LED                  J5

  Power LED & keylock          J3       Turbo switch               J7

  Speaker                      J4       Reset switch               J8

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

  »   CMOS memory normal operation            J1            pins 2 & 3
                                                              closed

      CMOS memory clear                       J1               Open

      External battery select                 J1            Connected

  »   Monitor type select color               J2               Open

      Monitor type select monochrome          J2              Closed

  »   CPU speed select iOSC/1                 J9            pins 1 & 2
                                                              closed

      CPU speed select iOSC/2                 J9            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

      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               J20               J21                J22

      80486SX             Open           pins 2 & 3            Open
                                           closed

      80487SX            Closed          pins 1 & 2         pins 2 & 3
                                           closed             closed

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

     ODP486SX            Closed          pins 1 & 2         pins 1 & 2
                                           closed             closed

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U40)      TAG (U30)

     32KB        (4) 8K x 8        NONE       (1) 8K x 8     (1) 16K x 4

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8     (1) 16K x 4

     128KB      (4) 32K x 8        NONE       (1) 32K x 8    (1) 16K x 4

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8    (1) 16K x 4

                        CACHE JUMPER CONFIGURATION

  Size     J11    J12     J13    J14    J15    J16    J17    J18     J19

  32KB     1 &    open    1 &    1 &    1 &    1 &    1 &    1 &    1 & 2
            2              2      2      2      2      2      2

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

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

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

  Note:Pins designated should be in the closed position.