
ATC/UNITRON COMPUTER & COMPUTER PARTS

486WL

Processor  CX486M6/CX486M7/AM486SXL/AM486SX(PLUS)/80486SX/AM486DXL/ 80486DX/
           80486DX2/AM486DX4(PLUS)/80486DX4/P23S/P24D/Pentium Overdrive
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/100(internal)/
Speed      120(internal)MHz
Chip Set   SIS
Max.       128MB
Onboard
DRAM
Cache      128/256/512/1024KB
BIOS       AMI/Award
Dimensions 330mm x 198mm
I/O        32-bit VESA local bus slot, PS/2 mouse port, floppy drive interface, green PC
Options    connector, IDE interface, parallel port, serial ports (2), VGA feature
           connector, VGA port, riser slot
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  VGA port                  CN1        Green PC connector       JP59

  Parallel port             CN2        IDE interface LED        JP60

  Serial port 2             CN3        Turbo LED            JP61 pins 1 &
                                                                  2

  Serial port 1             CN4        Turbo switch         JP61 pins 3 &
                                                                  4

  VGA feature               CN5        Reset switch             JP62
  connector

  IDE interface             CN6        Speaker                  JP63

  Floppy drive              CN7        Power LED &              JP64
  interface                            keylock

  PS/2 mouse port           CN8        Riser Card                SL1

  External battery         JP16        32-bit VESA local         SL2
                                       bus slot

  Green PC connector       JP51

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

      PS/2 mouse enabled                      JP3             Closed

      PS/2 mouse disabled                     JP3              Open

     Power good signal detect from           JP4           pins 1 & 2
      power supply                                            closed

      Power good signal detect from           JP4           pins 2 & 3
      board                                                   closed

     VGA BIOS enabled                        JP7           pins 1 & 2
                                                              closed

      VGA BIOS disabled                       JP7           pins 2 & 3
                                                              closed

     Factory configured - do not             JP8              N/A
      alter

      Monitor type select color               JP9             Closed

      Monitor type select monochrome          JP9              Open

     On board VGA enabled                    JP10          pins 1 & 2
                                                              closed

      On board VGA disabled                   JP10          pins 2 & 3
                                                              closed

     CMOS memory normal operation            JP11          pins 1 & 2
                                                              closed

      CMOS memory clear                       JP11          pins 2 & 3
                                                              closed

     ECP DRQ enabled                         JP12          pins 1 & 2
                                                              closed

      ECP DRQ disabled                        JP12          pins 2 & 3
                                                              closed

     ECP A10 enabled                         JP15          pins 1 & 2
                                                              closed

      ECP A10 disabled                        JP15          pins 2 & 3
                                                              closed

     Parallel port IRQ select IRQ7           JP17          pins 2 & 3
                                                              closed

      Parallel port IRQ select IRQ5           JP17          pins 1 & 2
                                                              closed

     Serial port IRQ select IRQ4             JP18          pins 3 & 4
                                                              closed

      Serial port IRQ select IRQ3             JP18          pins 1 & 2
                                                              closed

     Factory configured - do not             JP24             N/A
      alter

      CPU voltage regulator type              JP25          pins 1 & 2
      select LT1085                                           closed

      CPU voltage regulator type              JP25          pins 2 & 3
      select LT1085-3.3                                       closed

      CPU voltage regulator type              JP27            Closed
      select auto

      CPU voltage regulator type              JP27             Open
      select manual

     IDE interface enabled                   JP32             Open

      IDE interface disabled                  JP32            Closed

                    USER CONFIGURABLE SETTINGS (CON'T)

                Function                     Jumper          Position

     CPU clock = CLKIN                       JP47          pins 1 & 2
                                                              closed

      CPU clock delayed for CLKIN             JP47          pins 2 & 3
                                                              closed

     Internal clock select CLKIN             JP50          pins 1 & 2
                                                              closed

      Internal clock select 1/2 CLKIN         JP50          pins 2 & 3
                                                              closed

     Factory configured - do not             JP65             N/A
      alter

                       DRAM CONFIGURATION 1

      Size            Bank 0           Bank 1          Bank 2

       1MB         (4) 256K x 9         NONE            NONE

       2MB         (4) 256K x 9    (1) 256K x 36        NONE

       4MB          (4) 1M x 9          NONE            NONE

       5MB         (4) 256K x 9     (1) 1M x 36         NONE

       6MB         (4) 256K x 9    (1) 256K x 36     (1) 1M x 36

       8MB          (4) 1M x 9      (1) 1M x 36         NONE

      12MB          (4) 1M x 9      (1) 1M x 36      (1) 1M x 36

      16MB          (4) 4M x 9          NONE            NONE

      17MB         (4) 256K x 9     (1) 4M x 36         NONE

      18MB         (4) 256K x 9    (1) 256K x 36     (1) 4M x 36

      20MB          (4) 1M x 9      (1) 4M x 36         NONE

      24MB          (4) 1M x 9      (1) 1M x 36      (1) 4M x 36

      32MB          (4) 4M x 9      (1) 4M x 36         NONE

      36MB          (4) 1M x 9      (1) 4M x 36      (1) 4M x 36

      48MB          (4) 4M x 9      (1) 4M x 36      (1) 4M x 36

      64MB         (4) 16M x 9          NONE            NONE

      65MB         (4) 256K x 9     (1) 16M x 36        NONE

      68MB          (4) 1M x 9      (1) 16M x 36        NONE

      72MB          (4) 1M x 9      (1) 1M x 36     (1) 16M x 36

      80MB          (4) 4M x 9      (1) 16M x 36        NONE

      96MB          (4) 4M x 9      (1) 4M x 36     (1) 16M x 36

      128MB        (4) 16M x 9      (1) 16M x 36        NONE

                       DRAM CONFIGURATION 2

      Size            Bank 0           Bank 1          Bank 2

       1MB             NONE        (1) 256K x 36        NONE

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

       4MB             NONE         (1) 1M x 36         NONE

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

       6MB          (4) 1M x 9     (1) 256K x 36    (1) 256K x 36

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

      12MB          (4) 1M x 9      (1) 1M x 36      (1) 1M x 36

      16MB             NONE         (1) 4M x 36         NONE

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

      18MB          (4) 4M x 9     (1) 256K x 36    (1) 256K x 36

                   DRAM CONFIGURATION 2 (CON'T)

      Size            Bank 0           Bank 1          Bank 2

      20MB             NONE         (1) 1M x 36      (1) 4M x 36

      24MB          (4) 4M x 9      (1) 1M x 36      (1) 1M x 36

      32MB             NONE         (1) 4M x 36      (1) 4M x 36

      32MB             NONE         (1) 8M x 36         NONE

      36MB          (4) 4M x 9      (1) 1M x 36      (1) 4M x 36

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

      48MB          (4) 4M x 9      (1) 4M x 36      (1) 4M x 36

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

      64MB             NONE         (1) 8M x 36      (1) 8M x 36

      64MB             NONE         (1) 16M x 36        NONE

      65MB             NONE        (1) 256K x 36    (1) 16M x 36

      68MB             NONE         (1) 1M x 36     (1) 16M x 36

      72MB         (4) 16M x 9       (4) 1M x 9      (4) 1M x 9

      80MB             NONE          (4) 4M x 9      (4) 16M x 9

      96MB         (4) 16M x 9       (4) 4M x 9      (4) 4M x 9

      128MB            NONE         (4) 16M x 9      (4) 16M x 9

                         DRAM JUMPER CONFIGURATION

    Configuration          JP54              JP55              JP56

          1              pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed            closed            closed

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

                      CACHE CONFIGURATION

      Size           Bank 0          Bank 1           TAG

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

  Note: The location of Banks 0 & 1 and TAG are unidentified.

                        CACHE JUMPER CONFIGURATION

   Size      JP33     JP34       JP35         JP36        JP52     JP53

  128KB     1 & 2    1 & 2        Any          Any       1 & 2     1 & 2
                                setting      setting

   256KB    2 & 3    2 & 3        Any          Any       1 & 2     2 & 3
   (A)                          setting      setting

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

   512KB    2 & 3    2 & 3       2 & 3        2 & 3      2 & 3     2 & 3
   (A)

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

   1MB      2 & 3    2 & 3       2 & 3        1 & 2      2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

       Type          JP19       JP20        JP21       JP22       JP23

     CX486M6          N/A       2 & 3      1 & 2      2 & 3        N/A

     AM486SXL        1 & 2       N/A       2 & 3      2 & 3        N/A

  AM486SX(PLUS)      4 & 5       N/A       1 & 2      2 & 3       2 & 3

     80486SX         1 & 2       N/A       1 & 2      2 & 3        N/A

     AM486DXL        1 & 2       N/A       2 & 3      2 & 3        N/A

     CX486M7          N/A       2 & 3      1 & 2      2 & 3        N/A

     80486DX         1 & 2       N/A       1 & 2      2 & 3        N/A

     80486DX2        1 & 2       N/A       1 & 2      2 & 3        N/A

  AM486DX4(PLUS)     4 & 5       N/A       1 & 2      2 & 3       2 & 3

     80486DX4        1 & 2       N/A       1 & 2      2 & 3        N/A

       P23S          1 & 2       N/A       1 & 2      2 & 3        N/A

       P24D          2 & 3      1 & 2      1 & 2      1 & 2       1 & 2

       P24T          1 & 2      1 & 2      1 & 2      1 & 2        N/A

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CON'T)

       Type           JP38       JP39       JP40       JP41        JP42

      CX486M6        2 & 3       2 & 3       N/A       1 & 2      2 & 3

     AM486SXL         N/A        3 & 4      1 & 2      3 & 4      2 & 3

   AM486SX(PLUS)     4 & 5        N/A        N/A       2 & 3      2 & 3

      80486SX        4 & 5        N/A        N/A       2 & 3      2 & 3

     AM486DXL         N/A        3 & 4     1 & 2, 3    3 & 4     1 & 2, 3
                                             & 4                   & 4

      CX486M7        2 & 3       2 & 3      3 & 4      1 & 2     1 & 2, 3
                                                                   & 4

      80486DX        4 & 5        N/A       3 & 4      2 & 3     1 & 2, 3
                                                                   & 4

     80486DX2        4 & 5        N/A       3 & 4      2 & 3     1 & 2, 3
                                                                   & 4

  AM486DX4(PLUS)     4 & 5        N/A       3 & 4      2 & 3     1 & 2, 3
                                                                   & 4

     80486DX4        4 & 5        N/A       3 & 4      2 & 3     1 & 2, 3
                                                                   & 4

       P23S          4 & 5        N/A       3 & 4      2 & 3      2 & 3

       P24D          4 & 5        N/A       3 & 4      2 & 3     1 & 2, 3
                                                                   & 4

       P24T          1 & 2       1 & 2      2 & 3      2 & 3     1 & 2, 3
                                                                   & 4

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CON'T)

        Type           JP43     JP44     JP45     JP46     JP48     JP49

      CX486M6          N/A      N/A     2 & 3      N/A      N/A     N/A

      AM486SXL         N/A      N/A     4 & 5      N/A      N/A     N/A

   AM486SX(PLUS)       N/A      N/A     3 & 4      N/A      N/A     N/A

      80486SX          N/A      N/A     3 & 4      N/A     2 & 3   1 & 2

      AM486DXL         N/A      N/A     4 & 5      N/A     1 & 2   2 & 3

      CX486M7          N/A      N/A     2 & 3      N/A     1 & 2   2 & 3

      80486DX         2 & 3     N/A     3 & 4      N/A     2 & 3   1 & 2

      80486DX2        2 & 3     N/A     3 & 4      N/A     2 & 3   1 & 2

   AM486DX4(PLUS)     2 & 3     N/A     3 & 4      N/A     1 & 2   1 & 2

      80486DX4        1 & 2     N/A     3 & 4      N/A     2 & 3   1 & 2

        P23S           N/A      N/A     3 & 4      N/A      N/A     N/A

        P24D          1 & 2,    N/A     1 & 2,     N/A     1 & 2   1 & 2
                      or 2 &            3 & 4
                        3

        P24T           N/A      N/A     3 & 4     1 & 2,   1 & 2   1 & 2
                                                  or 2 &
                                                    3

  Note: Pins designated should be in the closed position. This board also
  accepts SL-series CPUs & am486dxl2, but no jumper settings are listed.

                CPU SPEED CONFIGURATION

           Speed                       JP37

           25MHz             pins 1 & 2, 5 & 6 closed

           33MHz             pins 1 & 2, 3 & 4 closed

           40MHz                 pins 5 & 6 closed

           50iMHz            pins 1 & 2, 5 & 6 closed

           50MHz                 pins 3 & 4 closed

           66iMHz            pins 1 & 2, 3 & 4 closed

           75iMHz            pins 1 & 2, 5 & 6 closed

           80iMHz                pins 5 & 6 closed

          100iMHz            pins 1 & 2, 3 & 4 closed

          120iMHz                pins 5 & 6 closed

        CPU VOLTAGE CONFIGURATION

       Voltage               JP26

     Auto detect             Open

        3.3v          pins 2 & 3 closed

         5v           pins 1 & 2 closed

                      VL BUS WAIT STATE CONFIGURATION

              Wait states                              JP58

               0 wait states                    pins 1 & 2 closed

               1 wait state                     pins 2 & 3 closed

                        VL BUS SPEED CONFIGURATION

               CPU speed                               JP57

                 <= 33MHz                      pins 1 & 2 closed

                  > 33MHz                      pins 2 & 3 closed

                             DMA CONFIGURATION

           DMA                      JP13                    JP14

           DMA 1            pins 2 & 3 closed        pins 2 & 3 closed

           DMA 3            pins 1 & 2 closed        pins 1 & 2 closed

                    FLOPPY ENHANCED MODE CONFIGURATION

           Setting                     JP28                  JP29

            Enabled                  Closed                Closed

            Disabled                  Open                  Open

                        MEDIA DETECT CONFIGURATION

           Setting                     JP30                  JP31

            Enabled                  Closed                Closed

            Disabled                  Open                  Open

          MISCELLANEOUS TECHNICAL NOTE

  Note: The location of pin 1 is unidentified.

