
WYSE TECHNOLOGY, INC.

WYSE DECISION 486SI

Processor       80486SX/80486DX/80486DX2
Processor Speed 16/20/25/33/50(internal)/66(internal)MHz
Chip Set        Unidentified
Max. Onboard    64MB
DRAM
Cache           64/256KB
BIOS            Unidentified
Dimensions      330mm x 218mm
I/O Options     PS/2 mouse port, parallel port, serial ports (2), VGA
                port, floppy drive interface, IDE interface
NPU Options     4167

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  PS/2 mouse port            CN1      Floppy drive interface       CN6

  VGA port                   CN2      IDE interface                CN7

  Parallel port              CN3      External battery             J1

  Serial port 2              CN4      Front panel connector        J2

  Serial port 1              CN5      Riser Card                   SL1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color               JP16            Closed

      Monitor type select monochrome          JP16             Open

     Factory configured - do not             JP17             Open
      alter

      IDE interface enabled                   JP18             Open

     IDE interface disabled                  JP18            Closed

     Factory configured - do not             JP19             Open
      alter

     Factory configured - do not             JP20             Open
      alter

     Factory configured - do not             JP21             Open
      alter

     Factory configured - do not             JP22             Open
      alter

     IRQ2 enabled                            JP33             Open

      IRQ2 disabled                           JP33            Closed

     ET4000 VGA card revision select         JP37            Closed
      revision G

      ET4000 VGA card revision select         JP37             Open
      revision F

     Clock generator select normal           JP41          pins 1 & 2
                                                              closed

      Clock generator select                  JP41          pins 2 & 3
      oscillator                                              closed

     WY-790 enabled                          JP42            Closed

      WY-790 disabled                         JP42             Open

     Diskette controller IRQ select          JP44          pins 1 & 2
      IRQ7                                                    closed

      Diskette controller IRQ select          JP44          pins 2 & 3
      IRQ5                                                    closed

     Linear address enabled                  JP46          pins 2 & 3
                                                              closed

      Linear address disabled                 JP46          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) 256K x     (1) 256K x        NONE           NONE
                    36             36

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

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

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

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

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

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

     10MB      (1) 1M x 36    (1) 1M x 36     (1) 256K x    (1) 256K x 36
                                                  36

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

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

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

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

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

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

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

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

     21MB      (1) 4M x 36    (1) 1M x 36     (1) 256K x        NONE
                                                  36

     22MB      (1) 4M x 36    (1) 1M x 36     (1) 256K x    (1) 256K x 36
                                                  36

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

     25MB      (1) 4M x 36    (1) 1M x 36    (1) 1M x 36    (1) 256K x 36

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0        Bank 1         Bank 2          Bank 3

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

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

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

     34MB       (1) 4M x 36   (1) 4M x 36     (1) 256K x    (1) 256K x 36
                                                 36

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

     37MB       (1) 4M x 36   (1) 4M x 36    (1) 1M x 36    (1) 256K x 36

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

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

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

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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8

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

       CACHE JUMPER CONFIGURATION

   Size      JP4       JP5       JP7

   None      Open     Open      Open

   64KB      Open     Open      Open

  256KB     Closed   Closed    Closed

                          CPU TYPE CONFIGURATION

        Type                JP1               JP2               JP3

       80486SX              Open             Open            pins 1 & 2
                                                              closed

       80486DX           pins 1 & 2         Closed           pins 2 & 3
                           closed                             closed

     SL80486DX2          pins 1 & 2         Closed           pins 2 & 3
                           closed                             closed

         CPU SPEED CONFIGURATION

  Speed      JP38      JP39      JP40

  16MHz     Closed     Open     Closed

  20MHz     Closed     Open      Open

  25MHz      Open     Closed    Closed

  33MHz      Open     Closed     Open

  50iMHz     Open     Closed    Closed

  66iMHz     Open     Closed     Open

              VRAM CONFIGURATION

      Size          Bank 0          Bank 1

     512KB        (4) 256K x 4       NONE

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

                             VGA CONFIGURATION

      Setting             JP8               JP35               JP45

      Enabled          pins 2 & 3         pins 1 & 2        pins 1 & 2
                         closed            closed             closed

     Disabled          pins 1 & 2         pins 2 & 3        pins 2 & 3
                         closed            closed             closed

           VGA WAIT STATE CONFIGURATION

   Wait states         JP31             JP32

  0 wait states       Closed            Open

  1 wait state         Open            Closed

