INFORMTECH INTERNATIONAL, INC.

IT486SLC MINI

Processor        80486SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed  20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set         Opti
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       330mm x 218mm
I/O Options      32-bit VESA local bus slots (3)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  External battery            J1        Reset switch               S1

  Power LED & keylock         J21       32-bit VESA Local bus     SL1
                                        slot

  Turbo LED                  JP12       32-bit VESA Local bus     SL2
                                        slot

  Turbo switch               JP13       32-bit VESA Local bus     SL3
                                        slot

  Speaker                    JP16

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation            JP1           pins 2 & 3
                                                              closed

      CMOS memory clear                       JP1           pins 1 & 2
                                                              closed

  »   Monitor type select color               JP2             Closed

      Monitor type select monochrome          JP2              Open

  »   Clock chip installed                    JP25             Open

      Clock chip not installed                JP25            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

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

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U39)      TAG (U40)

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

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

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

                        CACHE JUMPER CONFIGURATION

    Size          JP3             JP5             JP8            JP9

    64KB       pins 2 & 3      pins 2 & 3        Open           Open
                 closed          closed

   128KB       pins 1 & 2      pins 1 & 2        Open          Closed
                 closed          closed

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

                          CPU TYPE CONFIGURATION

        Type                JP6               JP7               JP11

       80486SX           pins 2 & 3           Open              Open
                           closed

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

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

  Pentium Overdrive      pins 1 & 2        pins 1 & 2          Closed
                           closed            closed

         CPU SPEED CONFIGURATION

  Speed      JP18      JP19      JP20

  20MHz      Open     Closed    Closed

  25MHz     Closed     Open     Closed

  33MHz     Closed    Closed     Open

  40MHz      Open      Open     Closed

  50iMHz    Closed    Closed    Closed

  50MHz      Open     Closed     Open

  66iMHz    Closed    Closed    Closed

        VESA WAIT STATE/BUS SPEED (ID2 & ID3) CONFIGURATION

    CPU speed      Wait states          JP14            JP17

     < 33MHz      0 wait states         Open            Open

     > 33MHz       1 wait state        Closed          Closed