EFA CORPORATION

ECA 510

Processor         80386DX/80486SX/80486DX
Processor Speed   16/20/25/33/40/50MHz
Chip Set          UMC
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        280mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J4       Power LED & keylock         J18

  Reset switch                J15      Speaker                     J19

  Turbo LED                   J16      Riser card                  R1

  Turbo switch                J17

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   Monitor type select color              J5                 Open

      Monitor type select                    J5                Closed
      monochrome

  »   Factory configured - do not            J10                N/A
      alter

  »   Factory configured - do not            J21                N/A
      alter

  »   BIOS type select 27512                 JP1             pins 2 & 3
                                                               closed

      BIOS type select 271024                JP1             pins 1 & 2
                                                               closed

  »   Factory configured - do not           S1/5                N/A
      alter

  »   Factory configured - do not           S1/8                N/A
      alter

              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

     64KB        (4) 8K x 8     (4) 8K x 8    (4) 16K x 4

     128KB      (4) 32K x 8        NONE       (4) 16K x 4

     256KB      (4) 32K x 8    (4) 32K x 8    (4) 16K x 4

                 CACHE JUMPER CONFIGURATION

   Size       J1        J2        J3        J13      J14

   64KB     2 & 3      1 & 2     1 & 2     1 & 2     N/A

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

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

  Note:Pins designated should be in the closed position.

                         CPU SWITCH CONFIGURATION (A)

   Type     S1/1  S1/2   S1/3   S1/4   S1/6   S1/7   S3/1   S3/2   S3/3  S3/4

  80386DX   On     On     On     On    Off    Off    On     On     Off   Off

  80486SX   Off   Off    Off    Off     On    On     Off    Off    On     On

  80486DX   Off   Off    Off    Off     On    On     On     On     Off   Off

  Note: All CPU configurations (Tables A & B) must be set for proper
  operation.

                        CPU TYPE CONFIGURATION (B)

     Type          S2/1           S2/2           S2/3            S2/4

  80386DX-16        Off            Off            On              On

  80386DX-20        Off            Off            On             Off

  80386DX-33        On             On             Off             On

  80386DX-40        On             On             On              On

  80486SX-20        On             Off            On             Off

  80486DX-25        On             Off            Off            Off

  80486DX-33        On             Off            Off             On

  80486DX-50        Off            Off            Off            Off