TRIGEM MICROSYSTEM, INC.

486/MV

Device Type         Mainboard
Processor           80486SX/80486DX/80486DX2
Processor Speed     25/33/50(internal)/66(internal)MHz
Chip Set            Unidentified
Video Chip Set      Unidentified
Maximum Onboard     40MB
Memory
Maximum Video       1MB
Memory
Cache               64/128/256KB
BIOS                Unidentified
Dimensions          330mm x 218mm
I/O Options         32-bit VESA local bus slot, floppy drive interface,
                    IDE interface, parallel port, PS/2 mouse port, serial
                    ports (2), riser slot
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  Parallel port             CN1       Floppy drive interface      CN5

  Serial port               CN2       IDE interface               CN6

  Serial port               CN3       Riser slot                  SL1

  PS/2 mouse port           CN4       32-bit VESA local bus       SL2
                                      slot

  Note: CN1 – CN6 are for general location purposes. The location may not
  be exact.

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

  »   Factory configured - do not           C1           Unidentified
      alter

  »   Factory configured - do not           C2           Unidentified
      alter

  »   Factory configured - do not           J2           Unidentified
      alter

  »   Factory configured - do not           J8           Unidentified
      alter

  »   Factory configured - do not           J9           Unidentified
      alter

  »   CMOS memory normal operation          J10        Pins 2 & 3 closed

      CMOS memory clear                     J10        Pins 1 & 2 closed

  »   Factory configured - do not           J11          Unidentified
      alter

  »   Password enabled                     SW1/4              Off

      Password disabled                    SW1/4              On

  »   Monitor type select color            SW1/5              On

      Monitor type select monochrome       SW1/5              Off

  »   Cache disabled                       SW1/6              Off

      Cache enabled                        SW1/6              On

                           SIMM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2        Bank 3

     4MB            4MB           None           None          None

     8MB            4MB       (1) 1M x 36        None          None

     12MB           4MB       (1) 1M x 36    (1) 1M x 36       None

     16MB           4MB       (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

     20MB           4MB       (1) 4M x 36        None          None

     24MB           4MB       (1) 1M x 36    (1) 4M x 36       None

     36MB           4MB       (1) 4M x 36    (1) 4M x 36       None

     40MB           4MB       (1) 1M x 36    (1) 4M x 36    (1) 4M x 36

  Note: Bank 0 is factory installed and is not configurable.

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

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

     128KB        (4) 32K x 8        None        Unidentified

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

                        CACHE JUMPER CONFIGURATION

    Size           J4              J5             J6             J7

    None        Pins 1 & 2     Pins 1 & 2     Pins 1 & 2      Pins 1 & 2
                 closed          closed         closed         closed

    64KB        Pins 1 & 2     Pins 1 & 2     Pins 1 & 2      Pins 2 & 3
                 closed          closed         closed         closed

    128KB       Pins 2 & 3     Pins 1 & 2     Pins 2 & 3      Pins 1 & 2
                 closed          closed         closed         closed

    256KB       Pins 2 & 3     Pins 2 & 3     Pins 1 & 2      Pins 2 & 3
                 closed          closed         closed         closed

                        VIDEO MEMORY CONFIGURATION

  Note: Board accepts 512KB/1MB of video memory. The location and chip
  sizes are unidentified.

          CPU SPEED SELECTION

  Speed     SW1/1     SW1/2    SW1/3

  25MHz      Off       Off       On

  33MHz      On        On       Off

  50iMHz     Off       Off       On

  66iMHz     On        On       Off

            CPU TYPE SELECTION

        Type                  J1

       80486SX        Pins 2 & 3 closed

       80486DX        Pins 1 & 2 closed

      80486DX2        Pins 1 & 2 closed