
ELITEGROUP COMPUTER SYSTEMS, INC.

UM4980

Processor  CX486S/SL80486SX/80486SX/SL80486SX2/80486SX2/AM486DXL/AM486DX/CX486DX/UMCU5S/AM486DXL/SL80486DX/80486DX/AM486DX2/CX486DX2/
           SL80486DX2/80486DX2/80486DX4
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   UMC
Max.       64MB
Onboard
DRAM
Cache      128/256/512/1024KB
BIOS       Phoenix
Dimensions 254mm x 218mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                 Location

  External battery             J2       Reset switch              J30

  Green PC connector          J27       Turbo switch              J31

  Turbo LED                   J28       Power LED & keylock       J32

  Speaker                     J29       32-bit VESA local      SL1 - SL3
                                        bus slots

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     BIOS type select EPROM                  JP1              Open

      BIOS type select 5v flash               JP1           pins 1 & 2
                                                              closed

      BIOS type select 12v flash              JP1           pins 2 & 3
                                                              closed

     Keyboard type select external           JP3              Open

      Keyboard type select internal           JP3             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

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

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

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

     4MB           NONE           NONE        (1) 512K x    (1) 512K x 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

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

     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          NONE           NONE       (1) 2M x 36     (1) 2M 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

     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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1        Bank 2          Bank 3

     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

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

     256KB        (4) 64K x 8        NONE        (1) 32K x 8

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

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

     512KB       (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      JP4     JP5      JP6     JP10     JP11      JP12      JP13

   128KB    1 & 2    1 & 2   Open     Open     Open      Open      Open

   256KB    1 & 2    1 & 2   1 & 2    Open     Open      Open     Closed

   256KB    2 & 3    2 & 3   Open     Open     Open      Open     Closed

   512KB    2 & 3    2 & 3   2 & 3    Open    Closed     Open     Closed

   512KB    1 & 2    2 & 3   2 & 3    1 & 2   Closed     Open     Closed

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

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

        Type              JP14              JP15               JP16

       CX486S        pins 2 & 3, 4 &        2 & 3              Open
                        5 closed

     SL80486SX       pins 1 & 2, 3 &        2 & 3              Open
                        4 closed

      80486SX             Open            pins 2 & 3           Open
                                           closed

     SL80486SX2      pins 1 & 2, 3 &        2 & 3              Open
                        4 closed

      80486SX2            Open            pins 2 & 3           Open
                                           closed

      AM486DXL            Open         pins 1 & 2, 3 &    pins 1 & 2, 3 &
                                          4 closed           4 closed

      AM486DX             Open         pins 1 & 2, 3 &      pins 1 & 2
                                          4 closed            closed

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

      UMC U5S             Open            pins 2 & 3        pins 3 & 4
                                           closed             closed

     AM486DXL2            Open         pins 1 & 2, 3 &    pins 1 & 2, 3 &
                                          4 closed           4 closed

     SL80486DX       pins 1 & 2, 3 &   pins 1 & 2, 3 &      pins 1 & 2
                        4 closed          4 closed            closed

      80486DX             Open         pins 1 & 2, 3 &      pins 1 & 2
                                          4 closed            closed

      AM486DX2            Open         pins 1 & 2, 3 &      pins 1 & 2
                                          4 closed            closed

      CX486DX2          pins 2 & 3     pins 1 & 2, 3 &      pins 1 & 2
                         closed           4 closed            closed

     SL80486DX2      pins 1 & 2, 3 &   pins 1 & 2, 3 &      pins 1 & 2
                        4 closed          4 closed            closed

      80486DX2            Open         pins 1 & 2, 3 &      pins 1 & 2
                                          4 closed            closed

   80486DX2 (WB)     pins 1 & 2, 3 &   pins 1 & 2, 3 &      pins 1 & 2
                        4 closed          4 closed            closed

      80486DX4       pins 1 & 2, 3 &   pins 1 & 2, 3 &      pins 1 & 2
                        4 closed          4 closed            closed

                      CPU TYPE CONFIGURATION (CONT)

         Type                JP17             JP18              JP19

        CX486S           2 & 3, 4 & 5     1 & 2, 3 & 4,     1 & 2, 3 & 4,
                                              5 & 6            5 & 6

       SL80486SX             5 & 6            1 & 2            1 & 2

        80486SX              Open             2 & 3             Open

      SL80486SX2             5 & 6            1 & 2            1 & 2

       80486SX2              Open             2 & 3             Open

       AM486DXL              1 & 2            2 & 3            2 & 3

        AM486DX              Open             2 & 3             Open

        CX486DX          2 & 3, 4 & 5     1 & 2, 3 & 4,     1 & 2, 3 & 4
                                              5 & 6

        UMC U5S              1 & 2            2 & 3            2 & 3

       AM486DXL2             1 & 2            2 & 3            2 & 3

       SL80486DX             5 & 6            1 & 2            1 & 2

        80486DX              Open             2 & 3             Open

       AM486DX2              Open             2 & 3             Open

       CX486DX2          2 & 3, 4 & 5     1 & 2, 3 & 4,     1 & 2, 3 & 4
                                              5 & 6

      SL80486DX2             5 & 6            1 & 2            1 & 2

       80486DX2              Open             2 & 3             Open

     80486DX2 (WB)       3 & 4, 5 & 6     1 & 2, 4 & 5      1 & 2, 4 & 5

       80486DX4              5 & 6            1 & 2            1 & 2

  Note: Pins designated should be in the closed position.

          CPU SPEED CONFIGURATION

   Speed      JP7        JP8        JP9

   25MHz     Closed      Open      Open

   33MHz     Closed     Closed    Closed

   40MHz     Closed     Closed     Open

  50iMHz     Closed      Open      Open

   50MHz      Open       Open     Closed

  66iMHz     Closed     Closed    Closed

  75iMHz     Closed      Open      Open

  100iMHz    Closed     Closed    Closed

  CPU SPEED CONFIGURATION (80486DX4 ONLY)

        Speed                  JP24

          2x            pins 2 & 3 closed

          3x                   Open

                         CPU VOLTAGE CONFIGURATION

     Voltage             JP20               JP21               JP22

       3.3v            pins 2 & 3        pins 2 & 3         pins 2 & 3
                        closed             closed             closed

      3.45v            pins 2 & 3        pins 2 & 3         pins 1 & 2
                        closed             closed             closed

        5v             pins 1 & 2        pins 1 & 2            Open
                        closed             closed

  VESA WAIT STATE CONFIGURATION

   Wait states         JP26

  0 wait states        Open

  1 wait state        Closed

  BUS SPEED CONFIGURATION

  CPU speed        JP25

   <= 33MHz        Open

   > 33MHz        Closed

