UNIDENTIFIED

486UL (VER. 2)

Processor              80486SX/80487SX/ODP486/80486DX/80486DX2
Processor Speed        25/33/40/50(internal)/50/66(internal)MHz
Chip Set               UMC
Video Chip Set         None
Maximum Onboard Memory 64MB
Maximum Video Memory   None
Cache                  64/128/256KB
BIOS                   AMI/Award
Dimensions             250mm x 220mm
I/O Options            32-bit VESA local bus slots (3)
NPU Options            None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  External battery            J1       Power LED & keylock         J5

  Turbo LED                   J2       Reset switch                J6

  Turbo switch                J3       32-bit VESA local bus   SL1 - SL3
                                       slots

  Speaker                     J4

                        USER CONFIGURABLE SETTINGS

                    Function                       Label       Position

      Turbo switch enabled/controlled by kbd        J3           Open
      CTRL, ALT - (low), CTRL, ALT + (high)

      Turbo switch disabled                         J3          Closed

  »   Any VESA card installed                       JP9         1 & 2

      Weitek Power 9000 VESA card installed         JP9         2 & 3

              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) 1M x 9     (4) 256K x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         None

      17MB        (4) 4M x 9     (4) 256K x 9

      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 8

                   CACHE RESISTOR CONFIGURATION

      Size             RN6              RN7              RN8

      64KB          Installed      Not installed    Not installed

      128KB       Not installed      Installed      Not installed

      256KB       Not installed    Not installed      Installed

                            CPU SPEED SELECTION

     Speed           J22            JP3           JP4            JP5

     25MHz        Pins 1 & 2      Closed          Open           Open
                   closed

     33MHz        Pins 1 & 2      Closed         Closed         Closed
                   closed

     40MHz        Pins 1 & 2      Closed         Closed          Open
                   closed

    50iMHz        Pins 1 & 2      Closed          Open           Open
                   closed

     50MHz        Pins 2 & 3       Open           Open          Closed
                   closed

    66iMHz        Pins 1 & 2      Closed         Closed         Closed
                   closed

                            CPU TYPE SELECTION

          Type                     JP1                      JP2

         80486SX            Pins 2 & 3 closed               Open

         80487SX             Pins 1 & 2, 3 & 4       Pins 2 & 3 closed
                                  closed

         ODP486              Pins 1 & 2, 3 & 4       Pins 2 & 3 closed
                                  closed

         80486DX             Pins 1 & 2, 3 & 4       Pins 1 & 2 closed
                                  closed

        80486DX2             Pins 1 & 2, 3 & 4       Pins 1 & 2 closed
                                  closed

                        VL BUS WAIT STATE SELECTION

               Setting                                JP13

                     0                                Open

  »                  1                               Closed

  VL-BUS SPEED SELECTION

  CPU speed       JP12

  <= 33MHz        Open

   >33 MHz       Closed