
ELITEGROUP COMPUTER SYSTEMS, INC.

UM4981 AIO

Processor  CX486S/U5S/SL80486SX/80486SX/SL80486SX2/80486SX2/AM486DX/
           AM486DXL/CX486DX/SL80486DX/80486DX/AM486DXL2/AM486DX2/
           CX486DX2/SL80486DX2/80486DX2/P24D/80486DX4
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   UMC
Max.       64MB
Onboard
DRAM
Cache      64/128/256KB
BIOS       Phoenix
Dimensions 330mm x 218mm
I/O        32-bit VESA local bus slots (2), floppy drive interface, green PC
Options    connector, IDE interfaces (2), parallel port, serial ports (2)
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                 Location

  Parallel port                J1       Power LED & keylock       JP30

  Serial port 1                J2       Speaker                   JP31

  Serial port 2                J3       Reset switch              JP32

  Floppy drive interface       J4       Turbo LED                 JP33

  IDE interface                J5       Turbo switch              JP34
  (primary)

  IDE interface                J6       IDE interface LED         JP39
  (secondary)

  External battery            JP1       32-bit VESA local      SL1 & SL2
                                        bus slots

  Green PC connector          JP15

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Flash BIOS voltage select 5v            JP2           pins 1 & 2
                                                              closed

      Flash BIOS voltage select 12v           JP2           pins 2 & 3
                                                              closed

     On board I/O enabled                    JP3           pins 1 & 2
                                                              closed

      On board I/O disabled                   JP3           pins 2 & 3
                                                              closed

     Parallel port IRQ select IRQ7           JP4           pins 2 & 3
                                                              closed

      Parallel port IRQ select IRQ5           JP4           pins 1 & 2
                                                              closed

     Factory configured - do not             JP7              N/A
      alter

     Parallel port mode select normal        JP8              Open
      mode

      Parallel port mode select ECP           JP8             Closed
      mode

     Primary IDE interface enabled           JP35          pins 1 & 2
                                                              closed

      Primary IDE interface disabled          JP35          pins 2 & 3
                                                              closed

     Secondary IDE interface enabled         JP36          pins 1 & 2
                                                              closed

      Secondary IDE interface disabled        JP36          pins 2 & 3
                                                              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        (1) 512K x        NONE
                                                  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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0        Bank 1         Bank 2          Bank 3

     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

     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          JP22            JP23           JP24           JP25

    64KB       pins 2 & 3         Open           Open           Open
                 closed

   128KB       pins 1 & 2      pins 1 & 2        Open          Closed
                 closed          closed

   256KB       pins 2 & 3      pins 2 & 3       Closed         Closed
                 closed          closed

                          CPU TYPE CONFIGURATION

      Type             JP16               JP17                JP18

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

      U5S              Open             pins 1 & 2     pins 2 & 3 closed
                                         closed

   SL80486SX      pins 1 & 2, 3 &       pins 5 & 6     pins 1 & 2 closed
                     4 closed            closed

    80486SX            Open               Open         pins 2 & 3 closed

   SL80486SX2     pins 1 & 2, 3 &       pins 5 & 6     pins 1 & 2 closed
                     4 closed            closed

    80486SX2           Open               Open         pins 2 & 3 closed

    AM486DX            Open               Open         pins 2 & 3 closed

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

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

   SL80486DX      pins 1 & 2, 3 &       pins 5 & 6     pins 1 & 2 closed
                     4 closed            closed

    80486DX            Open               Open         pins 2 & 3 closed

    AM486DX2           Open               Open         pins 2 & 3 closed

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

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

   SL80486DX2     pins 1 & 2, 3 &       pins 5 & 6     pins 1 & 2 closed
                     4 closed            closed

    80486DX2           Open               Open         pins 2 & 3 closed

      P24D        pins 1 & 2, 3 &    pins 3 & 4, 5 &    pins 1 & 2, 4 & 5
                     4 closed           6 closed             closed

    80486DX4      pins 1 & 2, 3 &       pins 5 & 6     pins 1 & 2 closed
                     4 closed            closed

                      CPU TYPE CONFIGURATION (CONT)

       Type               JP19              JP20               JP21

      CX486S         pins 1 & 2, 3 &        Open            pins 2 & 3
                        4 closed                              closed

        U5S             pins 2 & 3        pins 3 & 4        pins 2 & 3
                         closed            closed             closed

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

      80486SX             Open              Open            pins 2 & 3
                                                              closed

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

     80486SX2             Open              Open            pins 2 & 3
                                                              closed

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

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

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

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

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

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

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

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

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

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

       P24D          pins 1 & 2, 4 &      pins 1 & 2      pins 1 & 2, 3 &
                        5 closed           closed            4 closed

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

          CPU SPEED CONFIGURATION

   Speed      JP9        JP10      JP11

   25MHz      Open       Open     Closed

   33MHz     Closed     Closed    Closed

   40MHz      Open      Closed    Closed

  50iMHz      Open       Open     Closed

   50MHz     Closed      Open      Open

  66iMHz     Closed     Closed    Closed

  75iMHz      Open       Open     Closed

  100iMHz    Closed     Closed    Closed

  CPU SPEED CONFIGURATION (80486DX4 ONLY)

        Speed                  JP29

          2x            pins 2 & 3 closed

          3x                   Open

                         CPU VOLTAGE CONFIGURATION

                Voltage                               JP26

    3.3v (from on board regulator)              pins 3 & 4 closed

    3.3v (from special power supply             pins 5 & 6 closed
                 unit)

  5v (from standard power supply unit           pins 1 & 2 closed

  VESA WAIT STATE CONFIGURATION

   Wait states         JP27

  0 wait states        Open

  1 wait state        Closed

  BUS SPEED CONFIGURATION

  CPU speed        JP28

   <= 33MHz        Open

   > 33MHz        Closed

                    ECP MODE CONFIGURATION

       Setting               JP5                  JP6

     DRQ1/DACK 1       pins 1 & 2 closed   pins 1 & 2 closed

     DRQ3/DACK 3       pins 2 & 3 closed   pins 2 & 3 closed

                      HARD DRIVE TIMING CONFIGURATION

   Active      Cycle     Speed        HDD capacity        JP37     JP38
    time       time

    15T        30T         1            40/50MHz         2 & 3     2 & 3

    15T        19T         2            25/33MHz         1 & 2     2 & 3

     9T        13T         3      <20mhz/enhanced IDE    2 & 3     1 & 2

    18T        37T         0         <40mhz/non ATA      1 & 2     1 & 2
                                        support

