INFORMTECH INTERNATIONAL, INC.

IT486SMVG MINI VER. 1.1

Processor        80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed  20/25/33/40(internal)50/50(internal)/66(internal)MHz
Chip Set         FOREX
Max. Onboard DRAM64MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       230mm x 218mm
I/O Options      32-bit VESA local bus slots (3)
NPU Options      None

[Image]

                                CONNECTIONS

         Purpose           Location    Purpose                  Location

  Turbo LED                   J6       Reset switch               J10

  Speaker                     J7       External battery           JP1

  Turbo switch                J8       32-bit VESA Local bus      SL1
                                       slots

  Power LED & keylock         J9       32-bit VESA Local bus   SL2 & SL3
                                       slots

                         USER CONFIGURABLE SETTINGS

                 Function                     Jumper          Position

  »  CPU type select - 486DX/DX2/P24T           JP2          pins 1 & 2
     (PGA)                                                     closed

     CPU type select - 486SX/DX (PQFP) &        JP2          pins 2 & 3
     487SX/P23T (PGA)                                          closed

  »  CPU type select -PGA                    JP3 & JP4       pins 1 & 2
                                                               closed

     CPU type select -PQFP                   JP3 & JP4       pins 2 & 3
                                                               closed

  »  PFPQ disabled                              JP5            Closed

     PFPQ enabled                               JP5             Open

  »  CMOS memory normal operation               JP6             Open

     CMOS memory clear                          JP6            Closed

  »  Factory configured - do not alter          JP9             Open

  »  CPU type select - 486CPU                  JP12          pins 1 & 2
                                                               closed

     CPU type select - P24T CPU                JP12          pins 2 & 3
                                                               closed

  »  Factory configured - do not alter         JP13             Open

  »  Factory configured - do not alter         JP14             Open

  »  Factory configured - do not alter         JP15             Open

  »  Factory configured - do not alter         JP16             Open

  »  Cyrix CPU type select - CX486DX           JP20             Open

     Cyrix CPU type select - CX486DX2          JP20            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

      64MB        (4) 16M x 9        NONE

                        CACHE CONFIGURATION

       Size           Bank 0           Bank 1            TAG

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

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

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

  Note: Bank 0 = U31, U32, U33, U34 Bank 1 = U27, U28, U29, U30

                        CACHE JUMPER CONFIGURATION

      Size              JP8A               JP8B               JP8C

      64KB            pins 2 & 3        pins 1 & 2      pins 2 & 3 closed
                       closed             closed

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

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

      CLOCK SPEED CONFIGURATION

  Speed     JP7A     JP7B     JP7C

  20MHz     Open    Closed   Closed

  25MHz    Closed    Open     Open

  33MHz     Open     Open     Open

  40MHz    Closed   Closed    Open

  50MHz     Open    Closed    Open

  50iMHz   Closed    Open     Open

  66iMHz    Open     Open     Open

                  VESA WAIT STATE/BUS SPEED CONFIGURATION

    CPU speed        Wait states           JP10               JP11

     < 33MHz        0 wait states        pins 1 & 2         pins 1 & 2
                                          closed             closed

     > 33MHz         1 wait state        pins 2 & 3         pins 2 & 3
                                          closed             closed