
EFA CORPORATION

ECA 34M50HL

Processor               80386DX/80486DX/80486DX2
Processor Speed         16/20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set                UMC
Max. Onboard DRAM       32MB
Cache                   64/128/256KB
BIOS                    AMI
Dimensions              254mm x 218mm
I/O Options             32-bit VESA local bus slot
NPU Options             80387

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  External battery            J1       Power LED & keylock        J10

  Speaker                     J7       Turbo switch               J11

  Turbo LED                   J8       32-bit VESA local bus       S1
                                       slot

  Reset switch                J9

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     BIOS type select 27256/27512             J2            pins 2 & 3
                                                              closed

      BIOS type select 271024                  J2            pins 1 & 2
                                                              closed

     Battery type select internal             W1             Closed

      Battery type select external             W1              Open

     Normal operation                         W2              Open

      Self test                                W2             Closed

     Monitor type select monochrome           W3             Closed

      Monitor type select color                W3              Open

     CMOS memory normal operations            W12           pins 1 & 2
                                                              closed

      CMOS memory clear                        W12           pins 2 & 3
                                                              closed

              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

      5MB         (4) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

      20MB        (4) 1M x 9      (4) 4M x 9

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

                            CACHE CONFIGURATION

       Size              Bank 0            Bank 1        TAG (U19 & U36)

       64KB            (4) 8K x 8        (4) 8K x 8         (2) 8K x 8

       128KB          (4) 32K x 8           NONE           (2) 32K x 8

       256KB          (4) 32K x 8        (4) 32K x 8       (2) 32K x 8

                        CACHE JUMPER CONFIGURATION

   Size    W4     W5      W6    W7      W8       W9       W10       W11

   64KB    1 &   Open     1 &   1 &    Open     Open      Open     Open
            2             2     2

  128KB    2 &   1 & 2    2 &   1 &   Closed    Open     Closed    Open
            3             3     2

  256KB    1 &   2 & 3    2 &   2 &   Closed    Closed   Closed    Closed
            2             3     3

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

     Type       J6      J13      SW2/1      SW2/2      SW2/3      SW2/4

   80386DX     2 & 3   1 & 2       On         On        On          On

  80486SX-20   1 & 2   1 & 2      Off        Off        Off        Off

  80486SX-25   1 & 2   1 & 2      Off        Off        Off        Off

   80487SX     1 & 2   1 & 2      Off        Off        Off        Off

   80486DX     1 & 2   2 & 3      Off        Off        Off        Off

   80486DX2    1 & 2   2 & 3      Off        Off        Off        Off

  Note:Pins designated should be in the closed position

                      CPU TYPE CONFIGURATION (CONT)

     Type       SW2/5   SW2/6    SW2/7    SW3/1   SW3/2    SW3/3   SW3/4

   80386DX       On      On       On       On      On      Off      Off

  80486SX-20    Off      Off     Off      Off      Off      On       On

  80486SX-25    Off      Off     Off      Off      Off      On      Off

   80487SX      Off      Off     Off       On      On      Off      Off

   80486DX      Off      Off     Off       On      On      Off      Off

   80486DX2     Off      Off     Off       On      On      Off      Off

  Note:Pins designated should be in the closed position

                      CPU TYPE & SPEED CONFIGURATION

     Type         Speed       SW1/1       SW1/2       SW1/3       SW1/4

  80486DX2-66     33MHz        On          Off         On          On

  80486DX2-50     25MHz        On          On          Off         On

  ODP486SX-66     33MHz        On          Off         On          On

  ODP486SX-50     25MHz        On          On          Off         On

  80486DX-50      50MHz        Off         Off         Off         Off

  80486DX-33      33MHz        Off         Off         Off         On

  80486DX-25      25MHz        On          On          Off         On

  80487SX-25      25MHz        On          On          Off         On

  80487SX-20      40MHz        Off         Off         On          Off

  80486SX-25      25MHz        On          On          Off         On

  80486SX-20      40MHz        Off         Off         On          Off

  80386DX-33      66MHz        Off         Off         Off         On

  80386DX-20      44MHz        On          Off         Off         Off

               VESA WAIT STATE CONFIGURATION

  Wait state         J3             J4            J5

  Auto detect      Closed          Open          Open

       0            Open           Open          Open

       1            Open          Closed         Open

