
EFA CORPORATION

486U-PIO

Processor  CX486SX/UMC486SX/80486SX/SL80486SX/CX486SX2/UMC486SX2/
           80486SX2/SL80486SX2/CX486DX/UMC486DX/AM486DX/(SL)AM486DX/
           80486DX/SL80486DX/CX486DX2/UMC486DX2/AM486DX2/(SL)AM486DX2/
           80486DX2/SL80486DX2/P24D/AM486DX4/(SL)AM486DX4/80486DX4/ Pentium
           Overdrive/CXM1
Processor  25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)/
Speed      120(internal)MHz
Chip Set   UMC
Max.       128MB
Onboard
DRAM
Cache      128/256/512/1024KB
BIOS       Award
Dimensions 280mm x 220mm
I/O        32-bit PCI slots (3), floppy drive interface, IDE interfaces (2), parallel
Options    port, serial ports (2)
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                 Location

  Floppy drive interface       J1       Power LED & keylock        J8

  Parallel port                J2       Speaker                    J9

  Serial port 1                J3       External battery          J10

  Serial port 2                J4       Reset switch              J12

  IDE interface 2              J5       Turbo switch              J13

  IDE interface 1              J6       Turbo LED                 J14

  IDE interface LED            J7       32-bit PCI slots        PC1 - PC3

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CMOS memory normal operation            JP1              Open

      CMOS memory clear                       JP1             Closed

     Monitor type select color               JP2             Closed

      Monitor type select monochrome          JP2              Open

     Flash BIOS voltage select 5v            JP3           pins 1 & 2
                                                              closed

      Flash BIOS voltage select 12v           JP3           pins 2 & 3
                                                              closed

      PS/2 mouse IRQ12 enabled                JP4             Closed

      PS/2 mouse IRQ12 disabled               JP4              Open

                            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

     3MB        (1) 256K x     (1) 512K x        NONE           NONE
                    36             36

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

     4MB        (1) 512K x     (1) 256K x     (1) 256K x        NONE
                    36             36             36

     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

     5MB        (1) 256K x     (1) 512K x     (1) 512K x        NONE
                    36             36             36

     5MB        (1) 256K x    (1) 1M x 36        NONE           NONE
                    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

     6MB        (1) 512K x    (1) 1M x 36        NONE           NONE
                    36

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

     7MB        (1) 256K x     (1) 512K x     (1) 512K x    (1) 512K x 36
                    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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     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

     9MB        (1) 256K x    (1) 1M x 36    (1) 1M x 36        NONE
                    36

     9MB        (1) 256K x    (1) 2M x 36        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

     10MB       (1) 512K x    (1) 1M x 36    (1) 1M x 36        NONE
                    36

     10MB       (1) 512K x    (1) 2M x 36        NONE           NONE
                    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

     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

     12MB      (1) 1M x 36    (1) 2M x 36        NONE           NONE

     13MB       (1) 256K x    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36
                    36

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

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

     17MB       (1) 256K x    (1) 2M x 36    (1) 2M x 36        NONE
                    36

     17MB       (1) 256K x    (1) 4M x 36        NONE           NONE
                    36

     18MB      (1) 4M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

     18MB      (1) 4M x 36     (1) 512K x        NONE           NONE
                                   36

     18MB       (1) 512K x    (1) 2M x 36    (1) 2M x 36        NONE
                    36

     18MB       (1) 512K x    (1) 4M x 36        NONE           NONE
                    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) 2M x 36    (1) 2M x 36        NONE

     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

     25MB       (1) 256K x    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36
                    36

     26MB       (1) 512K x    (1) 2M x 36    (1) 2M x 36     (1) 2M x 36
                    36

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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     28MB      (1) 1M x 36    (1) 2M x 36    (1) 2M x 36     (1) 2M 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

     33MB       (1) 256K x    (1) 4M x 36    (1) 4M x 36        NONE
                    36

     33MB       (1) 256K x    (1) 8M x 36        NONE           NONE
                    36

     34MB      (1) 8M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

     34MB      (1) 8M x 36     (1) 512K x        NONE           NONE
                                   36

     34MB       (1) 512K x    (1) 4M x 36    (1) 4M x 36        NONE
                    36

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

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

     36MB      (1) 1M x 36    (1) 8M 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

     40MB      (1) 2M x 36    (1) 4M x 36    (1) 4M x 36        NONE

     40MB      (1) 2M x 36    (1) 8M x 36        NONE           NONE

     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

     48MB      (1) 4M x 36    (1) 8M x 36        NONE           NONE

     49MB       (1) 256K x    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36
                    36

     50MB       (1) 512K x    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36
                    36

     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

     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

     65MB       (1) 256K x    (1) 8M x 36    (1) 8M x 36        NONE
                    36

     66MB       (1) 512K x    (1) 8M x 36    (1) 8M x 36        NONE
                    36

     68MB      (1) 1M x 36    (1) 8M x 36    (1) 8M x 36        NONE

     72MB      (1) 2M x 36    (1) 8M x 36    (1) 8M x 36        NONE

     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

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1         Bank 2         Bank 3

     97MB         (1) 256K x    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36
                     36

     98MB         (1) 512K x    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36
                     36

     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) 32K 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 or (1)
                                                             128K x 8

                        CACHE JUMPER CONFIGURATION

      Size              JP12               JP13               JP14

      128KB           pins 1 & 2        pins 1 & 2      pins 1 & 2 closed
                       closed             closed

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

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

    512KB (A)         pins 2 & 3        pins 2 & 3      pins 4 & 5 closed
                       closed             closed

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

       1MB            pins 2 & 3        pins 2 & 3      pins 5 & 6 closed
                       closed             closed

                          CPU TYPE CONFIGURATION

       Type          JP15        JP16       JP17       JP18        JP19

     CX486SX         1 & 2       Open      2 & 3       1 & 2     2 & 3, 4
                                                                   & 5

     UMC486SX        Open        Open      1 & 2       2 & 3       Open

     80486SX         Open        Open      1 & 2       1 & 2       Open

    SL80486SX        Open        Open      1 & 2       1 & 2     3 & 4, 5
                                                                   & 6

     CX486SX2        1 & 2       Open      2 & 3       1 & 2     2 & 3, 4
                                                                   & 5

    UMC486SX2        Open        Open      1 & 2       2 & 3       Open

     80486SX2        Open        Open      1 & 2       1 & 2       Open

    SL80486SX2       Open        Open      1 & 2       1 & 2     3 & 4, 5
                                                                   & 6

     CX486DX         1 & 2      1 & 2      2 & 3       1 & 2     2 & 3, 4
                                                                   & 5

     UMC486DX        Open       1 & 2      1 & 2       2 & 3       Open

     AM486DX         Open       1 & 2      1 & 2       2 & 3      1 & 2

   (SL)AM486DX       2 & 3      1 & 2      1 & 2       1 & 2     3 & 4, 5
                                                                   & 6

     80486DX         Open       1 & 2      1 & 2       1 & 2       Open

    SL80486DX        Open       1 & 2      1 & 2       1 & 2     3 & 4, 5
                                                                   & 6

     CX486DX2        1 & 2      1 & 2      2 & 3       1 & 2     2 & 3, 4
                                                                   & 5

    UMC486DX2        Open       1 & 2      1 & 2       2 & 3       Open

                      CPU TYPE CONFIGURATION (CONT)

       Type          JP15        JP16       JP17       JP18        JP19

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

   (SL)AM486DX2      2 & 3      1 & 2      1 & 2       1 & 2     3 & 4, 5
                                                                   & 6

     80486DX2        Open       1 & 2      1 & 2       1 & 2       Open

    SL80486DX2       Open       1 & 2      1 & 2       1 & 2     3 & 4, 5
                                                                   & 6

       P24D          2 & 3      1 & 2      1 & 2       1 & 2     3 & 4, 5
                                                                   & 6

     AM486DX4        Open       1 & 2      1 & 2       2 & 3       Open

   (SL)AM486DX4      2 & 3      1 & 2      1 & 2       1 & 2     3 & 4, 5
                                                                   & 6

     80486DX4        Open       1 & 2      1 & 2       1 & 2     3 & 4, 5
                                                                   & 6

       P24T          2 & 3      2 & 3      1 & 2       1 & 2     3 & 4, 5
                                                                   & 6

       CXM1          2 & 3     1 & 2, 3    1 & 2       1 & 2     3 & 4, 5
                                 & 4                               & 6

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

       Type             JP22          JP23         JP24          JP25

      CX486SX        2 & 3, 4 &      2 & 3         1 & 2         Open
                         5

     UMC486SX           Open         2 & 3         2 & 3         Open

      80486SX           Open         2 & 3         2 & 3         Open

     SL80486SX         5 & 6         2 & 3         1 & 2         Open

     CX486SX2        2 & 3, 4 &      2 & 3         1 & 2         Open
                         5

     UMC486SX2          Open         2 & 3         2 & 3         Open

     80486SX2           Open         2 & 3         2 & 3         Open

    SL80486SX2         5 & 6         2 & 3         1 & 2         Open

      CX486DX        2 & 3, 4 &    1 & 2, 3 &      1 & 2         Open
                         5             4

     UMC486DX           Open       1 & 2, 3 &      2 & 3         Open
                                       4

      AM486DX           Open       1 & 2, 3 &      2 & 3         Open
                                       4

    (SL)AM486DX      1 & 2, 3 &    1 & 2, 3 &      1 & 2         Open
                      4, 5 & 6         4

      80486DX           Open       1 & 2, 3 &      2 & 3         Open
                                       4

     SL80486DX         5 & 6       1 & 2, 3 &      1 & 2         Open
                                       4

     CX486DX2        2 & 3, 4 &    1 & 2, 3 &      1 & 2         Open
                         5             4

     UMC486DX2          Open       1 & 2, 3 &      2 & 3         Open
                                       4

     AM486DX2           Open       1 & 2, 3 &      2 & 3         Open
                                       4

   (SL)AM486DX2      1 & 2, 3 &    1 & 2, 3 &      1 & 2         Open
                      4, 5 & 6         4

     80486DX2           Open       1 & 2, 3 &      2 & 3         Open
                                       4

    SL80486DX2         5 & 6       1 & 2, 3 &      1 & 2         Open
                                       4

       P24D          3 & 4, 5 &    1 & 2, 3 &      1 & 2         Open
                         6             4

     AM486DX4           Open       1 & 2, 3 &      2 & 3         Open
                                       4

   (SL)AM486DX4      3 & 4, 5 &    1 & 2, 3 &      1 & 2         Open
                         6             4

     80486DX4          5 & 6       1 & 2, 3 &      1 & 2         Open
                                       4

       P24T            5 & 6       1 & 2, 3 &      1 & 2         Open
                                       4

       CXM1          3 & 4, 5 &    1 & 2, 3 &      1 & 2         Open
                         6             4

  Note: Pins designated should be in the closed position.

                          CPU SPEED CONFIGURATION

      Speed               JP9               JP10               JP11

      25MHz            pins 2 & 3        pins 1 & 2         pins 2 & 3
                        closed             closed             closed

      33MHz            pins 2 & 3        pins 2 & 3         pins 1 & 2
                        closed             closed             closed

      40MHz            pins 1 & 2        pins 1 & 2         pins 2 & 3
                        closed             closed             closed

      50iMHz           pins 2 & 3        pins 1 & 2         pins 2 & 3
                        closed             closed             closed

      66iMHz           pins 2 & 3        pins 2 & 3         pins 1 & 2
                        closed             closed             closed

      75iMHz           pins 2 & 3        pins 1 & 2         pins 2 & 3
                        closed             closed             closed

      80iMHz           pins 1 & 2        pins 1 & 2         pins 2 & 3
                        closed             closed             closed

     100iMHz           pins 2 & 3        pins 2 & 3         pins 1 & 2
                        closed             closed             closed

     120iMHz           pins 1 & 2        pins 1 & 2         pins 2 & 3
                        closed             closed             closed

                         CPU VOLTAGE CONFIGURATION

         Voltage                   JP20                     JP21

          3.3v               pins 2 & 3, 4 & 5       pins 1 & 2 closed
                                  closed

          3.45v              pins 2 & 3, 4 & 5       pins 2 & 3 closed
                                  closed

          3.8v               pins 2 & 3, 4 & 5       pins 4 & 5 closed
                                  closed

           4v                pins 2 & 3, 4 & 5       pins 5 & 6 closed
                                  closed

           5v               pins 1 & 2 , 5 & 6       pins 2 & 3 closed
                                  closed

                             DMA CONFIGURATION

           DMA                     JP5                     JP6

           DMA 3            pins 2 & 3 closed       pins 2 & 3 closed

           DMA 5            pins 1 & 2 closed       pins 1 & 2 closed

