
EFA CORPORATION

3486UC-L4-U3

Processor         80386DX/80486SX/80486DX
Processor Speed   16/20/25/33/40/50(internal)/50MHz
Chip Set          UMC
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Speaker                     J2       Turbo LED                   J16

  External battery            J4       Power LED & keylock         J18

  Reset switch                J15      Speaker                     J19

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color                J9           pins 2 & 3
                                                              closed

      Monitor type select monochrome           J9           pins 1 & 2
                                                              closed

     Turbo switch enabled                    J17              Open

      Turbo switch normal operation           J17             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

      64KB         (4) 8K x 8       (4) 8K x 8     (1) 8K x 8

     128KB         (4) 32K x 8         NONE        (1) 32K x 8

     256KB         (4) 32K x 8     (4) 32K x 8     (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

    Size          J1          J2          J3          J13         J14

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

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

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

  Note:Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

    Type       SW1/switch 1   SW1/switch 2   SW1/switch 3   SW1/switch 4

   80386DX         On             On             Off             Off

   80486SX         Off            Off             On             On

   80486DX         On             On             Off             Off

                      CPU TYPE CONFIGURATION (CONT.)

   Type     SW2/1   SW2/2   SW2/3   SW2/4   SW2/5   SW2/6   SW2/7   SW2/8

  80386DX    On      On      On      On     Off     Off      On      On

  80486SX   Off     Off     Off     Off      On      On      On      Off

  80486DX   Off     Off     Off     Off      On      On      On      Off

                          CPU SPEED CONFIGURATION

   Speed     SW3/switch 1    SW3/switch 2    SW3/switch 3   SW3/switch 4

   16MHz          On             Off              On             On

   20MHz          On             Off              On             Off

   25MHz          On             Off             Off             Off

   33MHz          On             Off             Off             On

   40MHz          Off             On             Off             On

  50i MHz         On             Off             Off             Off

   50MHz          Off             On             Off             Off

