
MYLEX CORPORATION

EM386X

Processor         80386DX
Processor Speed   25/33MHz
Chip Set          Unidentified
Max. Onboard DRAM 32MB
Cache             16/32/64/128KB
BIOS              AMI/Award/Mylex/Phoenix
Dimensions        305mm x 330mm
I/O Options       32-bit Intel slots (2), 32-bit external memory card
NPU Options       80287/80387DX/3167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                 Location

  External battery            BAT       Power LED & keylock       J17

  Turbo switch                 J6       Reset switch              J18

  Single-step control         J10       32-bit Intel slots     SL1 & SL2
  switch

  Speaker connector           J14       32-bit external           SL3
                                        memory card

  Turbo LED                   J16

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

      I/O bus speed select 1 wait              J1             Closed
      states

      I/O bus speed select 2 wait              J1              Open
      states

     Factory configured - do not alter        J2             Closed

     Monitor type select monochrome           J3            pins 1 & 2
                                                              closed

      Monitor type select color                J3            pins 2 & 3
                                                              closed

     AT bus DRAM refresh signal               J4             Closed
      disabled

      AT bus DRAM refresh signal               J4              Open
      enabled

     80386 <Rev. D NPU interface bug          J5              Open
      bypass disabled

      80386 <Rev. D NPU interface bug          J5             Closed
      bypass enabled

     Turbo mode enabled                       J6              Open

      Turbo mode disabled                      J6             Closed

     Cache enabled                            J9              Open

      Cache disabled                           J9             Closed

     Factory configured - do not alter        J11              N/A

     Factory configured - do not alter        J13           pins 1 & 2
                                                              closed

     Factory configured - do not alter        J15           pins 1 & 2
                                                              closed

     Factory configured - do not alter        J22              N/A

     Factory configured - do not alter        J23            Closed

     Factory configured - do not alter        J26              N/A

     Factory configured - do not alter        J27            Closed

     Memory access on Intel 32-bit bus        J28            Closed
      cached

      Memory access on Intel 32-bit bus        J28             Open
      cached

     ROM address select 0F0000 and            J30             Open
      FF0000

      ROM address select 0F0000                J30            Closed

     Factory configured - do not alter        J33              N/A

     NPU type select 80387                    J34            Closed

      NPU type select 80287                    J34             Open

     NPU synchronous with CPU                 J35             Open

      NPU asynchronous with CPU                J35            Closed

     Factory configured - do not alter        J37           pins 1 & 2
                                                              closed

     Factory configured - do not alter        J38              N/A

     80387 reset normal                       J40             Open

      80387 reset on port F1h                  J40            Closed

                    USER CONFIGURABLE SETTINGS (CONT)

              Function                  Jumper/Switch        Position

     ROM caching disabled                   J41               Open

      ROM caching enabled                    J41              Closed

     Single step mode disabled              J42             pins 2 & 3
                                                              closed

      Single step mode enabled               J42             pins 1 & 2
                                                              closed

     Factory configured - do not            J43                N/A
      alter

     BIOS speed select 250ns                J44             pins 3 & 4
                                                              closed

      BIOS speed select 200ns                J44             pins 1 & 2
                                                              closed

      BIOS speed select 200ns for            J44               Open
      25MHz machine

      BIOS speed select 150ns for            J44               Open
      33MHz machine

     Factory configured - do not            J46                N/A
      alter

     Factory configured - do not            J47                N/A
      alter

     Factory configured - do not            J48                N/A
      alter

     Factory configured - do not            J49                N/A
      alter

     Factory configured - do not            J50                N/A
      alter

     Intel NPU not installed               SW0/1               On

      Intel NPU installed                   SW0/1               Off

     No ISA bus card installed             SW0/2               On
      w/memory between 12 and 14MB

      ISA bus card installed with           SW0/2               Off
      memory between 12 and 14MB

      ROM shadowing disabled                SW0/8               On

      ROM shadowing enabled                 SW0/8               Off

     Factory configured - do not           SW0/9               N/A
      alter

     Factory configured - do not          SW0/10               N/A
      alter

                         CACHE CONFIGURATION

       Size            Bank 0            Bank 1             TAG

       16KB          (8) 4K x 4           NONE          (>1) 4K x 4

      32KB 1         (8) 4K x 4        (8) 4K x 4      (>1) 16K x 4

      32KB 2         (8) 8K x 4           NONE         (>1) 16K x 4

       64KB          (8) 16K x 4          NONE         (>1) 16K x 4

      128KB          (8) 16K x 4      (8) 16K x 4      (>1) 16K x 4

  Note: The exact location and number of tag chips is unidentified.

                        CACHE JUMPER CONFIGURATION

  Size         J7           J8          J12          J29          J31

  16KB     pins 5 & 6   pins 3 & 4   pins 5 & 6     Open       pins 1 & 2
             closed       closed       closed                   closed

  32KB 1   pins 5 & 6   pins 5 & 6   pins 5 & 6    Closed      pins 5 & 6
             closed       closed       closed                   closed

  32KB 2   pins 5 & 6   pins 5 & 6   pins 5 & 6     Open       pins 1 & 2
             closed       closed       closed                   closed

  64KB     pins 5 & 6   pins 5 & 6   pins 3 & 4     Open       pins 1 & 2
             closed       closed       closed                   closed

  128KB    pins 3 & 4   pins 5 & 6   pins 3 & 4    Closed      pins 3 & 4
             closed       closed       closed                   closed

                    CACHE JUMPER CONFIGURATION (CONT)

    Size          J36            J39             J51             J52

    16KB       pins 2 & 3     pins 5 & 6      pins 2 & 3      pins 2 & 3
                 closed         closed         closed          closed

   32KB 1      pins 2 & 3     pins 7 & 8      pins 2 & 3      pins 2 & 3
                 closed         closed         closed          closed

   32KB 2      pins 2 & 3     pins 5 & 6      pins 2 & 3      pins 2 & 3
                 closed         closed         closed          closed

    64KB       pins 1 & 2     pins 5 & 6      pins 1 & 2      pins 1 & 2
                 closed         closed         closed          closed

   128KB       pins 1 & 2     pins 3 & 4      pins 1 & 2      pins 1 & 2
                 closed         closed         closed          closed

[Image]

[Image]

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      32MB        (4) 4M x 9      (4) 4M x 9

                      DRAM SWITCH CONFIGURATION

    Size      EMS Size    SW1/1       SW1/2       SW1/3      SW1/4

    1MB        NONE         On         On          On         On

    1MB       0.375MB      Off         On          On         On

    2MB         1MB         On         On          Off        On

    2MB       1.375MB      Off         On          Off        On

    4MB         3MB         On         On          Off        Off

    4MB       3.375MB      Off         On          Off        Off

    8MB         7MB        Off         On          Off        Off

    8MB       7.375MB       On         Off         On         On

    16MB       13MB         On         Off         On         Off

    16MB      14.875MB      On         Off         Off        On

    32MB      30.875MB      On         Off         Off        Off

                         DRAM SPEED CONFIGURATION

  CPU Speed      DRAM          J25         SW0/5      SW0/6       SW0/7
                Speed

    25MHz        80ns       pins 1 & 2       On         On         On
                             closed

    25MHz       100ns       pins 3 & 4      Off        Off         Off
                             closed

    33MHz        60ns       pins 1 & 2       On         On         On
                             closed

    33MHz        80ns       pins 3 & 4      Off        Off         Off
                             closed

                          BIOS TYPE CONFIGURATION

           Type                     J21                     J24

            27256            pins 1 & 2 closed       pins 2 & 3 closed

            27128            pins 1 & 2 closed       pins 1 & 2 closed

            27512            pins 2 & 3 closed       pins 2 & 3 closed

                         CACHEABLE AREA SELECTION

  Cacheable RAM     Min. cache       SW0/2        SW0/3          SW0/4
                       size

       32MB           128KB           N/A          Off            Off

       16MB            64KB           N/A           On            Off

       14MB           128KB           Off          Off            On

       8MB            128KB           On           Off            On

       4MB             N/A            N/A           On            On

                       DRAM/CACHE MODE CONFIGURATION

    DRAM    Interleave      Cache     J19       J20      J1/M      J2/M
   size                     size

    1MB         No          Any       Open     2 & 3     1 & 2     1 & 2

    2MB         No          Any      3 & 4      Open     1 & 2     1 & 2

    2MB         Yes         16KB      Open     1 & 2     1 & 2     3 & 4

    2MB         Yes        32KB 1    1 & 2      Open     3 & 4     1 & 2

    2MB         Yes        32KB 2     Open     1 & 2     1 & 2     3 & 4

    2MB         Yes         64KB      Open     1 & 2     1 & 2     3 & 4

    2MB         Yes        128KB     1 & 2      Open     3 & 4     1 & 2

    4MB         No          Any       Open     2 & 3     1 & 2     1 & 2

    8MB         No          Any      5 & 6      Open     1 & 2     1 & 2

    8MB         Yes         16KB      Open     1 & 2     1 & 2     5 & 6

    8MB         Yes        32KB 1    1 & 2      Open     5 & 6     1 & 2

    8MB         Yes        32KB 2     Open     1 & 2     1 & 2     5 & 6

    8MB         Yes         64KB      Open     1 & 2     1 & 2     5 & 6

    8MB         Yes        128KB     1 & 2      Open     5 & 6     1 & 2

   16MB         No          Any       Open     2 & 3     1 & 2     1 & 2

   32MB         No          Any      7 & 8      Open     1 & 2     1 & 2

   32MB         Yes         16KB      Open     1 & 2     1 & 2     7 & 8

   32MB         Yes        32KB 1    1 & 2      Open     7 & 8     1 & 2

   32MB         Yes        32KB 2     Open     1 & 2     1 & 2     7 & 8

   32MB         Yes         64KB      Open     1 & 2     1 & 2     7 & 8

   32MB         Yes        128KB     1 & 2      Open     7 & 8     1 & 2

  Note: Pins designated should be in the closed position.

