
INFORMTECH INTERNATIONAL, INC.

IT486SMV MINI (Ver. 1.00)

Processor          80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed    20/25/33/50(internal)/66(internal)MHz
Chip Set           OPTI
Max. Onboard DRAM  32MB
SRAM Cache         64/128/256KB
BIOS               AMI
Dimensions         220mm x 230mm
I/O Options        32-bit VESA card slot (2)
NPU Options        None

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  External battery            JP2       Turbo switch              JP15

  Reset switch                JP3       Turbo LED                 JP16

  Power LED & keylock         JP9       32-bit VESA local       S1 & S2
                                        bus slots

  Speaker                    JP10

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not alter        JP5             open

     CMOS memory normal operation             JP6             open

      CMOS memory clear                        JP6            closed

     Wait states select zero                 JP102         pins 1 & 2
                                                              closed

      Wait state select one                   JP102         pins 2 & 3
                                                              closed

     Local bus speed select  33MHz          JP103         pins 1 & 2
                                                              closed

      Local bus speed select > 33MHz          JP103         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

      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

                     CPU TYPE CONFIGURATION

         Type           Jumper JP12 & JP13   Jumper JP29 & JP30

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

       ODP486SX         pins 1 & 2 closed    pins 2 & 3 closed

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

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

       80486SX          pins 2 & 3 closed    pins 2 & 3 closed

                          CPU SPEED CONFIGURATION

        Speed           Jumper JP7A       Jumper JP7B       Jumper JP7C

   66(internal)MHz       pins 1 & 2        pins 1 & 2        pins 2 & 3
                          closed            closed            closed

   50(internal)MHz       pins 1 & 2        pins 2 & 3        pins 1 & 2
                          closed            closed            closed

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

        25MHz            pins 1 & 2        pins 2 & 3        pins 1 & 2
                          closed            closed            closed

        20MHz            pins 2 & 3        pins 1 & 2        pins 1 & 2
                          closed            closed            closed

                         SRAM JUMPER CONFIGURATION

    Size      Jumper JP8A    Jumper JP8B     Jumper JP8D     Jumper JP8E

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

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

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

                            SRAM CONFIGURATION

    Size         Max. Cacheable    Cache SRAM     Location         TAG
                    Memory

    64KB             16MB          (8) 8K x 8    Banks 0 & 1     (1) 8K x
                                                                    8

    128KB            32MB           (4) 32K x      Bank 0        (1) 8K x
                                       8                            8

    256KB            32MB           (8) 32K x    Banks 0 & 1    (1) 32K x
                                       8                            8

