
SKYWELL TECHNOLOGY CORPORATION, LTD.

SW-486VM

Processor  UMCSX/80486DX/AM486DX2/80486DX2/TI486DX4/AM486DX4/
           8046DX4/CX5X86/AM5X86
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   VIA
Video Chip None
Set
Maximum    128MB (EDO supported)
Onboard
Memory
Maximum    None
Video
Memory
Cache      128/256/512/1024KB
BIOS       Award
Dimensions 250mm x 220mm
I/O        32-bit PCI slots (3), floppy drive interface, game interface, IDE
Options    interfaces (2), parallel port, PS/2 mouse port, PS/2 mouse
           interface, serial ports (2)
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  PS/2 mouse interface       CN1       External battery           JBA1

  PS/2 mouse port            CN3       External battery           JBA2

  Game interface             CN5       Power LED & keylock        JW1

  Parallel port              CN7       Turbo LED                  JW2

  Floppy drive interface     CN8       Speaker                    JW3

  Serial port 1              CN9       Turbo switch               JW4

  IDE interface 1            CN10      Reset switch               JW5

  IDE interface 2            CN11      IDE interface LED          JW6

  Serial port 2              CN12      32-bit PCI slots         PC1 - PC3

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not          J104          Unidentified
      alter

     Factory configured - do not          J105          Unidentified
      alter

     Factory configured - do not          J106          Unidentified
      alter

     Factory configured - do not          JIDE          Unidentified
      alter

     Factory configured - do not           JG1          Unidentified
      alter

     Factory configured - do not           JG2          Unidentified
      alter

     Factory configured - do not           JG3          Unidentified
      alter

     Factory configured - do not           JG4          Unidentified
      alter

     Factory configured - do not           JM5          Unidentified
      alter

     Factory configured - do not          JMS2          Unidentified
      alter

     Factory configured - do not           JT1          Unidentified
      alter

     Factory configured - do not           JT4          Unidentified
      alter

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (1) 256K x        None           None           None
                    36

     2MB        (1) 512K x        None           None           None
                    36

     2MB        (1) 256K x     (1) 256K x        None           None
                    36             36

     3MB        (1) 512K x     (1) 256K x        None           None
                    36             36

     3MB        (1) 256K x     (1) 256K x     (1) 256K x        None
                    36             36             36

     3MB        (1) 256K x     (1) 512K x        None           None
                    36             36

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

     4MB        (1) 512K x     (1) 256K x     (1) 256K x        None
                    36             36             36

     4MB        (1) 512K x     (1) 512K x        None           None
                    36             36

     4MB        (1) 256K x     (1) 256K x     (1) 256K x    (1) 256K x 36
                    36             36             36

     5MB       (1) 1M x 36     (1) 256K x        None           None
                                   36

     5MB        (1) 512K x     (1) 256K x     (1) 256K x    (1) 256K x 36
                    36             36             36

     5MB        (1) 256K x     (1) 512K x     (1) 512K x        None
                    36             36             36

     5MB        (1) 256K x    (1) 1M x 36        None           None
                    36

     6MB       (1) 1M x 36     (1) 256K x     (1) 256K x        None
                                   36             36

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     6MB       (1) 1M x 36     (1) 512K x        None           None
                                   36

     6MB        (1) 512K x     (1) 512K x     (1) 512K x        None
                    36             36             36

     6MB        (1) 512K x    (1) 1M x 36        None           None
                    36

     7MB       (1) 1M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     7MB        (1) 256K x     (1) 512K x     (1) 512K x    (1) 512K x 36
                    36             36             36

     8MB       (1) 2M x 36        None           None           None

     8MB       (1) 1M x 36     (1) 512K x     (1) 512K x        None
                                   36             36

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

     8MB        (1) 512K x     (1) 512K x     (1) 512K x    (1) 512K x 36
                    36             36             36

     9MB       (1) 2M x 36     (1) 256K x        None           None
                                   36

     9MB        (1) 256K x    (1) 1M x 36    (1) 1M x 36        None
                    36

     9MB        (1) 256K x    (1) 2M x 36        None           None
                    36

     10MB      (1) 2M x 36     (1) 256K x     (1) 256K x        None
                                   36             36

     10MB      (1) 2M x 36     (1) 512K x        None           None
                                   36

     10MB      (1) 1M x 36     (1) 512K x     (1) 512K x    (1) 512K x 36
                                   36             36

     10MB       (1) 512K x    (1) 1M x 36    (1) 1M x 36        None
                    36

     10MB       (1) 512K x    (1) 2M x 36        None           None
                    36

     11MB      (1) 2M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     12MB      (1) 2M x 36     (1) 512K x     (1) 512K x        None
                                   36             36

     12MB      (1) 2M x 36    (1) 1M x 36        None           None

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

     12MB      (1) 1M x 36    (1) 2M x 36        None           None

     13MB       (1) 256K x    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36
                    36

     14MB      (1) 2M x 36     (1) 512K x     (1) 512K x    (1) 512K x 36
                                   36             36

     14MB       (1) 512K x    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36
                    36

     16MB      (1) 4M x 36        None           None           None

     16MB      (1) 2M x 36    (1) 1M x 36    (1) 1M x 36        None

     16MB      (1) 2M x 36    (1) 2M x 36        None           None

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

     17MB      (1) 4M x 36     (1) 256K x        None           None
                                   36

     17MB       (1) 256K x    (1) 2M x 36    (1) 2M x 36        None
                    36

     17MB       (1) 256K x    (1) 4M x 36        None           None
                    36

     18MB      (1) 4M x 36     (1) 256K x     (1) 256K x        None
                                   36             36

     18MB      (1) 4M x 36     (1) 512K x        None           None
                                   36

     18MB       (1) 512K x    (1) 2M x 36    (1) 2M x 36        None
                    36

     18MB       (1) 512K x    (1) 4M x 36        None           None
                    36

     19MB      (1) 4M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     20MB      (1) 4M x 36     (1) 512K x     (1) 512K x        None
                                   36             36

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

     20MB      (1) 2M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

     22MB      (1) 4M x 36     (1) 512K x     (1) 512K x    (1) 512K x 36
                                   36             36

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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     24MB      (1) 4M x 36    (1) 2M x 36        None           None

     24MB      (1) 2M x 36    (1) 2M x 36    (1) 2M x 36        None

     25MB       (1) 256K x    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36
                    36

     26MB       (1) 512K x    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36
                    36

     28MB      (1) 4M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

     28MB      (1) 1M x 36    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36

     32MB      (1) 8M x 36        None           None           None

     32MB      (1) 4M x 36    (1) 2M x 36    (1) 2M x 36        None

     32MB      (1) 4M x 36    (1) 4M x 36        None           None

     32MB      (1) 2M x 36    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36

     33MB      (1) 8M x 36     (1) 256K x        None           None
                                   36

     33MB       (1) 256K x    (1) 4M x 36    (1) 4M x 36        None
                    36

     34MB      (1) 8M x 36     (1) 256K x     (1) 256K x        None
                                   36             36

     34MB      (1) 8M x 36     (1) 512K x        None           None
                                   36

     34MB       (1) 512K x    (1) 4M x 36    (1) 4M x 36        None
                    36

     34MB       (1) 512K x    (1) 8M x 36        None           None
                    36

     35MB      (1) 8M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     36MB      (1) 8M x 36     (1) 512K x     (1) 512K x        None
                                   36             36

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

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

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

     38MB      (1) 8M x 36     (1) 512K x     (1) 512K x    (1) 512K x 36
                                   36             36

     40MB      (1) 8M x 36    (1) 1M x 36    (1) 1M x 36        None

     40MB      (1) 8M x 36    (1) 2M x 36        None           None

     40MB      (1) 4M x 36    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36

     40MB      (1) 2M x 36    (1) 4M x 36    (1) 4M x 36        None

     40MB      (1) 2M x 36    (1) 8M x 36        None           None

     44MB      (1) 8M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

     48MB      (1) 8M x 36    (1) 2M x 36    (1) 2M x 36        None

     48MB      (1) 8M x 36    (1) 4M x 36        None           None

     48MB      (1) 4M x 36    (1) 4M x 36    (1) 4M x 36        None

     49MB       (1) 256K x    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36
                    36

     50MB       (1) 512K x    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36
                    36

     52MB      (1) 1M x 36    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36

     56MB      (1) 8M x 36    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36

     56MB      (1) 2M x 36    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36

     64MB      (1) 8M x 36    (1) 4M x 36    (1) 4M x 36        None

     64MB      (1) 8M x 36    (1) 8M x 36        None           None

     64MB      (1) 4M x 36    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36

     65MB       (1) 256K x    (1) 8M x 36    (1) 8M x 36        None
                    36

     66MB       (1) 512K x    (1) 8M x 36    (1) 8M x 36        None
                    36

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1         Bank 2         Bank 3

     68MB        (1) 1M x 36    (1) 8M x 36    (1) 8M x 36       None

     72MB        (1) 2M x 36    (1) 8M x 36    (1) 8M x 36       None

     80MB        (1) 8M x 36    (1) 4M x 36    (1) 4M x 36   (1) 4M x 36

     80MB        (1) 4M x 36    (1) 8M x 36    (1) 8M x 36       None

     96MB        (1) 8M x 36    (1) 8M x 36    (1) 8M x 36       None

     97MB         (1) 256K x    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36
                     36

     98MB         (1) 512K x    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36
                     36

     100MB       (1) 1M x 36    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36

     104MB       (1) 2M x 36    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36

     112MB       (1) 4M x 36    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36

     128MB       (1) 16M x 36    (1) 16M x        None           None
                                    36

     128MB       (1) 8M x 36    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

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

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

   256KB (B)      (4) 64K x 8        None        (1) 32K x 8

   512KB (A)      (4) 64K x 8     (4) 64K x 8    (1) 32K x 8

   512KB (B)     (4) 128K x 8        None        (1) 32K x 8

      1MB        (4) 128K x 8    (4) 128K x 8    (1) 64K x 8

                        CACHE JUMPER CONFIGURATION

    Size       JS1        JS2       JS3       JS4       JS5        JS6

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

  256KB (A)   2 & 3      1 & 2     1 & 2     1 & 2     1 & 2      1 & 2

  256KB (B)   2 & 3      1 & 2     1 & 2     1 & 2     2 & 3      1 & 2

  512KB (A)   2 & 3      2 & 3     1 & 2     1 & 2     1 & 2      1 & 2

  512KB (B)   2 & 3      2 & 3     1 & 2     1 & 2     1 & 2      2 & 3

    1MB       2 & 3      2 & 3     2 & 3     1 & 2     1 & 2      1 & 2

  Note: Pins designated should be in the closed position.

                            CPU SPEED SELECTION

     Speed          JCK1           JCK2          JCK3            JCK4

     25MHz       Pins 2 & 3     Pins 1 & 2     Pins 2 & 3     Pins 1 & 2
                   closed         closed        closed          closed

     33MHz       Pins 2 & 3     Pins 2 & 3     Pins 1 & 2     Pins 1 & 2
                   closed         closed        closed          closed

     40MHz       Pins 1 & 2     Pins 1 & 2     Pins 2 & 3     Pins 1 & 2
                   closed         closed        closed          closed

    50iMHz       Pins 2 & 3     Pins 1 & 2     Pins 2 & 3     Pins 1 & 2
                   closed         closed        closed          closed

     50MHz       Pins 2 & 3     Pins 1 & 2     Pins 2 & 3     Pins 1 & 2
                   closed         closed        closed          closed

    66iMHz       Pins 2 & 3     Pins 2 & 3     Pins 1 & 2     Pins 1 & 2
                   closed         closed        closed          closed

    75iMHz       Pins 2 & 3     Pins 1 & 2     Pins 2 & 3     Pins 1 & 2
                   closed         closed        closed          closed

    100iMHz      Pins 2 & 3     Pins 2 & 3     Pins 1 & 2     Pins 1 & 2
                   closed         closed        closed          closed

                            CPU TYPE SELECTION

    Type      JC1     JC2     JC3      JC4       JC5      JT2       JT3

   UMC SX    1 & 2   2 & 3   1 & 2    Open      Open      Open     Open

  80486DX2   1 & 2   1 & 2   1 & 2    Open      Open      Open     Open

  AM486DX2   1 & 2   1 & 2   1 & 2    Open     Closed     Open     2 & 3

  80486DX2   1 & 2   1 & 2   1 & 2    Open      Open      Open     Open

  TI486DX4   1 & 2   1 & 2   1 & 2    Open      Open      Open     Open

  AM486DX4   1 & 2   1 & 2   1 & 2    Open      Open      Open     Open

  80486DX4   1 & 2   1 & 2   1 & 2   Closed     Open      Open     Open

  CX 5X86    1 & 2   1 & 2   1 & 2    Open      Open      Open     2 & 3

  AM 5X86    1 & 2   1 & 2   1 & 2    Open      Open      Open     Open

  Note: Pins designated should be in the closed position.

                    CPU VOLTAGE SELECTION

       Voltage               JPW1                 JPW2

        3.3v           Pins 7 & 8 closed   Pins 2 & 3 closed

        3.45v          Pins 5 & 6 closed   Pins 2 & 3 closed

        3.6v           Pins 3 & 4 closed   Pins 2 & 3 closed

         4v            Pins 1 & 2 closed   Pins 2 & 3 closed

         5v                  Open          Pins 1 & 2 closed

                            BATTERY SELECTION

         Setting                   JBA1                     JBA2

        External            Pins 3 & 4 closed               Open

        Internal            Pins 2 & 3 closed               Open

  CMOS normal operation     Pins 2 & 3 closed              Closed

    CMOS memory clear       Pins 3 & 4 closed               N/A

