
UNIDENTIFIED

VL-486

Processor              80486SX/80487SX/ODP487SX/80486DX/80486DX2
Processor Speed        25/33/50(internal)/50/66(internal)MHz
Chip Set               UMC
Video Chip Set         None
Maximum Onboard Memory 32MB
Maximum Video Memory   None
Cache                  128/256KB
BIOS                   AMI
Dimensions             254mm x 218mm
I/O Options            32-bit VESA local bus slots (2)
NPU Options            None

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                  Location

  External battery         BATT       Turbo switch                CN4

  Power LED & keylock       CN1       Turbo LED                   CN5

  Speaker                   CN2       Auxiliary keyboard          KBD
                                      connector

  Reset switch              CN3       32-bit VESA local bus    SL1 & SL2
                                      slots

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Battery type select internal            BATT          Pins 2 & 3
                                                              closed

      Battery type select external            BATT            Closed

      CMOS memory clear                       BATT          Pins 3 & 4
                                                              closed

      Monitor type select color               C/M             Closed

      Monitor type select monochrome          C/M              Open

                  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

  Note: The location of banks 0 & 1 is unidentified.

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     128KB      (4) 32K x 8        None       (1) 8K x 8

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

    Size           JS3            JS4            JS5             JS6

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

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

                       CPU SPEED SELECTION

   Speed       JC2        JC3        JF2        JF3       JF5

   25MHz      Open       2 & 3     Closed     Closed      Open

   33MHz      Open       2 & 3      Open      Closed     Closed

  50iMHz      Open       2 & 3     Closed     Closed      Open

   50MHz     Closed      1 & 2      Open       Open       Open

  66iMHz      Open       2 & 3      Open      Closed     Closed

  Note: Pins designated should be in the closed position.

                            CPU TYPE SELECTION

          Type                     JC5                      JC6

         80486SX            Pins 2 & 3 closed               Open

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

        ODP487SX             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                                 J2

                    0                                Open

                     1                               Closed

  VL BUS SPEED SELECTION

    Speed          J1

  <= 33MHz        Open

   >33 MHz       Closed


