
MNC INTERNATIONAL, INC.

MNC 1144 COMPLETE 486SBC (Rev. 2.10)

Processor           80486SX/80487SX/80486DX/8486DX2
Processor Speed     25/33/50(internal)/50/66(internal)
Chip Set            VSLI
Max. Onboard DRAM   32MB
Cache               None
BIOS                Phoenix
Dimensions          333mm x 107mm
I/O Options         Floppy drive interface, IDE interface, parallel port,
                    serial port (2), VGA port
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  IDE interface LED            J1       Serial port 2              P4

  Turbo LED                    J5       Front panel switches       P5

  IDE interface                P1       LCD screen                 P6

  Floppy drive interface       P2       VGA port                   P7

  Serial port 1                P3       Parallel port              P8

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      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

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

     IDE interface enabled                     J2           pins 2 & 3
                                                              closed

      IDE interface disabled                    J2           pins 1 & 2
                                                              closed

     Floppy drive interface select             J3A          pins 2 & 3
      normal operation                                        closed

      Floppy drive interface select             J3A          pins 1 & 2
      encoded                                                 closed

     Floppy drive interface enabled            J3B          pins 2 & 3
                                                              closed

      Floppy drive interface disabled           J3B          pins 1 & 2
                                                              closed

     J3 Jumper settings enabled                J3H          pins 2 & 3
                                                              closed

      J3 Jumper settings disabled               J3H          pins 1 & 2
                                                              closed

      Watchdog Timer interval select 1.2        J4           pins 1 & 2
      second                                                  closed

      Watchdog Timer interval select            J4           pins 2 & 3
      150ms                                                   closed

      Watchdog Timer interval select            J4             open
      600ms

     Watchdog Timer enabled                    J4A          pins 1 & 2
                                                              closed

      Watchdog Timer disabled                   J4A          pins 2 & 3
                                                              closed

     Monitor type select color                 J7            closed

      Monitor type select monochrome            J7             open

      Paralell port select                      J9           pins 2 & 3
      Uni-directional                                         closed

      Paralell port select Bi-directional       J9           pins 1 & 2
                                                              closed

     Bus cycle lock enabled                    J14           closed

      Bus cycle lock disabled                   J14            open

     Burst mode enabled                        J17           closed

      Burst mode disabled                       J17            open

     Secondary cache disabled                  J18            open

      Secondary cache enabled                   J18           closed

     VGA port interrupt request select         J20          pins 1 & 2
      none                                                    closed

      VGA port interrupt request select         J20          pins 2 & 3
      IR/FONT>                                                closed

  Note:To disable Watchdog Timer (J4A) you must cut the trace between
  pins 1 & 2 on back of board.

                         SERIAL PORT CONFIGURATION

  Serial port 1   Serial port 2        J3C          J3D           J3E

      COM1             COM2         pins 2 & 3   pins 2 & 3   pins 2 & 3

      COM1           Disabled       pins 2 & 3   pins 1 & 2   pins 2 & 3

      COM2           Disabled       pins 1 & 2   pins 1 & 2   pins 2 & 3

      COM2             COM1         pins 1 & 2   pins 2 & 3   pins 2 & 3

    Disabled           COM1         pins 1 & 2   pins 2 & 3   pins 1 & 2

    Disabled           COM2         pins 2 & 3   pins 2 & 3   pins 1 & 2

    Disabled         Disabled       pins 1 & 2   pins 1 & 2   pins 1 & 2

  Note:Pins designated should be in the closed position.

                        PARALLEL PORT CONFIGURATION

               Function                       J3F               J3G

     Parallel port (P8) select LPT1       pins 2 & 3        pins 2 & 3
      at 378h                                closed           closed

      Parallel port (P8) select LPT2       pins 1 & 2        pins 2 & 3
      at 278h                                closed           closed

      Parallel port (P8) select LPT3       pins 2 & 3        pins 1 & 2
      at 3BCh                                closed           closed

      Parallel port (P8) disabled          pins 1 & 2        pins 1 & 2
                                             closed           closed

                LCD DISPLAY TYPE CONFIGURATION

             Type                            J8

               0                            open

               1                     pins 1 & 2 closed

               2                     pins 3 & 4 closed

               3                pins 1 & 2 and 3 & 4 closed

              FLASH MEMORY ADDRESS CONFIGURATION

            Address                         J19

         C0000 - C7FFF                      open

         C8000 - CFFFF               pins 3 & 4 closed

         D0000 - D7FFF               pins 1 & 2 closed

         D8000 - DFFFF          pins 1 & 2 and 3 & 4 closed

                          CPU TYPE CONFIGURATION

          Type                     J12                      J13

        80486DX2           pins 1 & 2 and 3 & 4      pins 3 & 4 closed
                                  closed

         80846DX           pins 1 & 2 and 3 & 4      pins 3 & 4 closed
                                  closed

         80487SX           pins 1 & 2 and 3 & 4      pins 1 & 2 closed
                                  closed

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

