JETPRO INFOTECH COMPANY, LTD.

MB-4F2

Processor             80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2
Processor Speed       20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set              FOREX
Max. Onboard DRAM     32MB
Cache                 64/128/256KB
BIOS                  AMI/AWARD
Dimensions            220.2mm x 250.2mm
I/O Options           32-bit local bus card slot
NPU Options           80387

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery            JP2       Turbo switch              JP15

  Reset switch                JP8       Turbo LED                 JP16

  Power LED & keylock         JP9       32-bit local bus card      S1

  Speaker                     JP10

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

  »   CMOS memory normal (internal            JP2          pins 1 and 2
      battery)                                                closed

      CMOS memory normal (external            JP2           connected
      battery)

      CMOS memory clear                       JP2              open

  »   Factory configured - do not             JP5             closed
      alter

  »   Factory configured - do not             JP6              open
      alter

              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

      CPU          JP12        JP13       JP30        W1B        W1C-K

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

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

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

    80486SX       pins 2 &   pins 2 &    pins 2 &   pins 1 &   pins 1 & 2
                     3          3           3          2

    CX486DLC        N/A        N/A         N/A      pins 1 &   pins 2 & 3
                                                       2

    80386DX         N/A        N/A         N/A      pins 2 &   pins 2 & 3
                                                       3

  Note:Pins designated should be in the closed position.

                           CACHE CONFIGURATION

     Size       Cache CACHE      Location       TAG(0)         TAG(1)

     64KB        (8) 8K x 8    Banks 0 & 1    (1) 8K x 8        NONE

     128KB      (4) 32K x 8       Bank 0      (1) 8K x 8        NONE

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

                        CACHE JUMPER CONFIGURATION

    Size         JP8A        JP8B        JP8C        JP8E         JP8F

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

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

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

  Note:Pins designated should be in the closed position.