
VISIONEX

486 AT MOTHERBOARD MODEL [4SPV5]

Processor  AM486SX/80486SX/CX486DX/AM486DX/80486DX/CX486DX2/
           AM486DX2/80486DX2/CX486DX4/AM486DX4/80486DX4
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed      100(internal)/120(internal)MHz
Chip Set   Unidentified
Video Chip None
Set
Maximum    64MB
Onboard
Memory
Maximum    None
Video
Memory
Cache      128/256/512/1024KB
BIOS       AMI/Award/MR
Dimensions 254mm x 218mm
I/O        32-bit VESA local bus slots (3)
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  Power LED & keylock        JP16       Turbo LED                 JP21

  Speaker                    JP17       Reset switch              JP26

  Turbo switch               JP19       32-bit VESA local      SL1 - SL3
                                        bus slots

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     CMOS memory normal operation            JP1           Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP1           Pins 2 & 3
                                                              closed

      Flash BIOS voltage select 12v           JP5           Pins 2 & 3
                                                              closed

      Flash BIOS voltage select 5v            JP5           Pins 1 & 2
                                                              closed

                            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

     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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     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

     20MB      (1) 1M x 36    (1) 2M x 36    (1) 2M x 36        None

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

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

     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

     24MB      (1) 2M x 36    (1) 4M x 36        None           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) 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) 256K x    (1) 4M x 36    (1) 4M x 36        None
                    36

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

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

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

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

                         DRAM JUMPER CONFIGURATION

                    Setting                                JP70

  Banks 0, 1, 2, & 3 are used as single banks       Pins 1 & 2 closed

  Banks 0 & 1 and Banks 2 & 3 used as banks 0       Pins 2 & 3 closed
               & 1 respectively

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

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

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

  Note: The location of the TAG is unidentified.

                        CACHE JUMPER CONFIGURATION

      Size               JP6               JP11               JP12

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

    256KB (A)           Open            Pins 1 & 2      Pins 1 & 2 closed
                                          closed

    256KB (B)           Open            Pins 2 & 3      Pins 1 & 2 closed
                                          closed

    512KB (A)           Open            Pins 2 & 3      Pins 2 & 3 closed
                                          closed

    512KB (B)         Pins 1 & 2           Open         Pins 2 & 3 closed
                       closed

       1MB            Pins 2 & 3           Open         Pins 2 & 3 closed
                       closed

                       CPU SPEED SELECTION

   Speed      JP2A       JP2B       JP2C       JP13       JP22

   25MHz     Closed      1 & 2      2 & 3     Closed      Open

   33MHz     Closed      2 & 3      1 & 2      Open       Open

   40MHz      Open       1 & 2      2 & 3      Open      Closed

  50iMHz     Closed      1 & 2      2 & 3     Closed      Open

   50MHz      Open       2 & 3      1 & 2      Open      Closed

  66iMHz     Closed      2 & 3      1 & 2      Open       Open

  75iMHz     Closed      1 & 2      2 & 3     Closed      Open

  80iMHz      Open       1 & 2      2 & 3      Open      Closed

  100iMHz    Closed      2 & 3      1 & 2      Open       Open

  120iMHz     Open       1 & 2      2 & 3      Open      Closed

  Note: Pins designated should be in the closed position.

                            CPU TYPE SELECTION

          Type                     JP15                     JP80

         AM486SX            Pins 1 & 2 closed         Pins 1 & 3, 2 & 4
                                                           closed

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

         AM486DX            Pins 1 & 2 closed         Pins 1 & 3, 2 & 4
                                                           closed

         CX486DX            Pins 2 & 3 closed         Pins 1 & 3, 2 & 4
                                                           closed

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

        AM486DX2            Pins 1 & 2 closed         Pins 1 & 3, 2 & 4
                                                           closed

     CX486DX2 (3.3v)        Pins 2 & 3 closed         Pins 3 & 5, 4 & 6
                                                           closed

      CX486DX2 (5v)         Pins 2 & 3 closed         Pins 1 & 3, 2 & 4
                                                           closed

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

        CX486DX4            Pins 2 & 3 closed         Pins 3 & 5, 4 & 6
                                                           closed

     AM486DX4 (3.3v)        Pins 1 & 2 closed         Pins 3 & 5, 4 & 6
                                                           closed

     80486DX4 (3.3v)        Pins 1 & 2 closed         Pins 3 & 5, 4 & 6
                                                           closed

