
INFORMTECH INTERNATIONAL, INC.

IT486SMVG MINI

Processor        80486SX/80487SX/CX486DX/80486DX/ODP486SX

                 CX486DX2/80486DX2/Pentium Overdrive
Processor Speed  20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set         FOREX
Max. Onboard DRAM64MB
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

  Turbo LED                   J6       External battery           JP1

  Speaker                     J7       32-bit VESA Local bus       S1
                                       slot

  Turbo switch                J8       32-bit VESA Local bus       S2
                                       slot

  Power LED & keylock         J9       32-bit VESA Local bus       S3
                                       slot

  Reset switch               J10

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     CPU PQFP enabled                        JP5              Open

      CPU PQFP disabled                       JP5             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 4

                        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

                          CPU TYPE CONFIGURATION

       Type          JP2        JP3        JP4       JP12         JP20

     80486SX       pins 2 &   pins 2 &   pins 2 &   pins 1 &      N/A
                      3          3          3          2

     80487SX       pins 2 &   pins 1 &   pins 1 &   pins 1 &      N/A
                      3          2          2          2

     CX486DX         N/A        N/A        N/A        N/A         Open

     80486DX       pins 1 &   pins 1 &   pins 1 &   pins 1 &      N/A
                      2          2          2          2

  80486DX (PQFP)   pins 2 &   pins 2 &   pins 2 &   pins 1 &      N/A
                      3          3          3          2

     ODP486SX      pins 2 &   pins 1 &   pins 1 &   pins 1 &      N/A
                      3          2          2          2

     CX486DX2        N/A        N/A        N/A        N/A        Closed

     80486DX2      pins 1 &   pins 1 &   pins 1 &   pins 1 &      N/A
                      2          2          2          2

      Pentium      pins 1 &   pins 1 &   pins 1 &   pins 2 &      N/A
    Overdrive         2          2          2          3

  Note:Pins designated should be in the closed position.

          CPU SPEED CONFIGURATION

   Speed      JP7A       JP7B      JP7C

   20MHz      Open      Closed    Closed

   25MHz      N/A        Open      Open

   33MHz      Open       Open      Open

   40MHz     Closed     Closed     Open

  50i MHz     N/A        Open      Open

   50MHz      Open      Closed     Open

  66i MHz     Open       Open      Open

                  VESA WAIT STATE/BUS SPEED CONFIGURATION

    CPU speed        Wait states           JP10               JP11

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

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

