
MYLEX CORPORATION

MPXS486

Processor  80486SX/ODP486/CX486DX/(SL)AM486DX/SL80486DX/CX486DX2/
           CX486DX2V/UMC U5S/AM486DX2/(SL)AM486DX2/SL80486DX2/
           AM486DX4/80486DX4/P24D/P24T
Processor  25/33/40/50(internal)/50/63(internal)/66(internal)/75(internal)/
Speed      80(internal)/83(internal)/100(internal)MHz
Chip Set   Unidentified
Video Chip None
Set
Maximum    128MB
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,
Options    green PC connector, IDE interfaces (2), parallel port, serial
           ports (2)
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Floppy drive interface     CN1       IDE interface LED 2        JP15

  Serial port 1              CN2       Green PC connector         JP29

  Serial port 2              CN3       Green PC LED               JP27

  Game interface             CN4       Turbo switch               JP35

  Parallel port              CN5       Turbo LED                  JP36

  IDE interface 2            CN6       Speaker                    JP37

  IDE interface 1            CN7       Reset switch               JP44

  External battery           JP12      Power LED & keylock        JP45

  IDE interface LED 1        JP14      32-bit PCI slots         PC1  PC3

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     CMOS memory normal operation            JP13          Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP13          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) 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

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

     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

     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

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

     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

     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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0        Bank 1         Bank 2          Bank 3

     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

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

     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) 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) 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) 1M x 36    (1) 1M x 36        None

     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

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

     34MB       (1) 8M x 36    (1) 512K x       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

     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

     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

     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

                       DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2        Bank 3

     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

     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

    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) 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       JP17       JP18      JP19      JP20       JP25       JP26

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

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

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

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

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

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

  Note: Pins designated should be in the closed position.

                     CPU SPEED SELECTION

        Speed                JP22                 JP23

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

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

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

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

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

       63iMHz          Pins 2 & 3 closed   Pins 2 & 3 closed

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

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

       80iMHz          Pins 1 & 2 closed   Pins 2 & 3 closed

       83iMHz          Pins 1 & 2 closed   Pins 1 & 2 closed

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

                            CPU TYPE SELECTION

     Type         J2        J3        J4        J5        J6        J7

   80486SX      Closed     Open      Open      Open     Closed     Open

    ODP486       Open     Closed     Open      Open     Closed     Open

   CX486DX       Open     Closed     Open     Closed     Open      Open

     (SL)        Open     Closed     Open      Open     Closed     Open
   AM486DX

  SL80486DX      Open     Closed     Open      Open     Closed     Open

   CX486DX2      Open     Closed     Open     Closed     Open      Open

  CX486DX2V      Open     Closed     Open     Closed     Open      Open

   UMC U5S      Closed     Open      Open      Open     Closed     Open

   AM486DX2      Open     Closed     Open      Open     Closed     Open

     (SL)        Open     Closed     Open      Open     Closed     Open
   AM486DX2

  SL80486DX2     Open     Closed     Open      Open     Closed     Open

   AM486DX4      Open     Closed     Open      Open     Closed     Open

   80486DX4      Open     Closed     Open      Open     Closed     Open

     P24D        Open      Open     Closed     Open      Open     Closed

     P24T        Open      Open     Closed     Open      Open     Closed

                        CPU TYPE SELECTION (CONT)

      Type          JP31        JP39       JP40        JP42       JP43

     80486SX        1 & 2      1 & 2       1 & 2      1 & 2       1 & 2

     ODP486         1 & 2      1 & 2       1 & 2      1 & 2       2 & 3

     CX486DX        1 & 2      1 & 2       1 & 2      1 & 2       1 & 2

  (SL) AM486DX      1 & 2      1 & 2       1 & 2      1 & 2       1 & 2

    SL80486DX       1 & 2      1 & 2       1 & 2      1 & 2       1 & 2

    CX486DX2        1 & 2      1 & 2       1 & 2      1 & 2       1 & 2

    CX486DX2V       1 & 2      1 & 2       1 & 2      1 & 2       1 & 2

     UMC U5S        2 & 3      2 & 3       2 & 3      1 & 2       1 & 2

    AM486DX2        1 & 2      1 & 2       1 & 2      2 & 3       1 & 2

  (SL) AM486DX2     1 & 2      1 & 2       1 & 2      1 & 2       1 & 2

   SL80486DX2       1 & 2      1 & 2       1 & 2      1 & 2       1 & 2

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

    80486DX4        1 & 2      1 & 2       1 & 2      1 & 2       1 & 2

      P24D          1 & 2      1 & 2       1 & 2      1 & 2       1 & 2

      P24T          1 & 2      1 & 2       1 & 2      1 & 2       2 & 3

  Note: Pins designated should be in the closed position.

  CPU MULTIPLIER SELECTION (80486DX4 ONLY)

      Multiplier               JP41

          2x             Pins 2 & 3 closed

          3x                   Open

                           CPU VOLTAGE SELECTION

     Voltage         JP32A         JP32B         JP32C          JP38

        3.3v         Open          Open          Open         Pins 1 & 2
                                                               closed

         4v          Open          Open          Open         Pins 2 & 3
                                                               closed

        5v         Closed        Closed        Closed        Pins 2 & 3
                                                               closed

         PCI BUS SPEED SELECTION

        Speed                JP21

      <= 33MHz        Pins 1 & 2 closed

       >33 MHz        Pins 2 & 3 closed

                    DMA CHANNEL SELECTION

       Channel               JP1                  JP2

          1            Pins 1 & 2 closed   Pins 1 & 2 closed

          3            Pins 2 & 3 closed   Pins 2 & 3 closed

