
COMPUTREND SYSTEMS, INC.

VLB486 AL5 (ALI-486G)

Processor  80486SX/SL80486SX/80486DX/SL80486DX/CXM7/AM486DX2/80486DX2/
           SL80486DX2/AM486DX4/80486DX4/P24D/P24T
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed      100(internal)MHz
Chip Set   ALI
Max.       64MB
Onboard
DRAM
Cache      128/256KB
BIOS       AMI
Dimensions 250mm x 220mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose              Location      Purpose                  Location

  External battery        JB         Reset switch           JFP pins 19 &
                                                                 20

  Power LED &         JFP pins 1 -   Green PC connector         JG1
  keylock                  5         (monitor)

  Speaker             JFP pins 7 -   Green PC LED               JG2
                          10

  Turbo LED          JFP pins 12 &   Green PC connector         JG3
                          13

  Turbo switch       JFP pins 15 -   32-bit VESA local       SL1 - SL3
                          17         bus slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Battery type select internal             JB           Pins 2 & 3
                                                              closed

      Battery type select external             JB             Closed

     Factory configured - do not             JC2              N/A
      alter

     Factory configured - do not             JC3              N/A
      alter

     Monitor type select monochrome          JP1           Pins 2 & 3
                                                              closed

      Monitor type select color               JP1           Pins 1 & 2
                                                              closed

                            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) 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) 1M x 36        None           None
                    36

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

     8MB        (1) 2M x 36       None           None           None

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

     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) 512K x   (1) 1M x 36    (1) 1M x 36        None
                    36

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

     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) 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) 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) 1M x 36        None           None

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

     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) 4M x 36        None           None

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

     32MB       (1) 8M x 36       None           None           None

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

     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

     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

     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) 2M x 36   (1) 4M x 36    (1) 4M x 36        None

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

     52MB       (1) 1M x 36   (1) 4M x 36    (1) 4M x 36     (1) 4M x 36

     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

                            CACHE CONFIGURATION

       Size             Bank 0           Bank 1               TAG

       128KB         (4) 32K x 8          None        (1) 8K/16K/32K x 8

     256KB (A)       (4) 32K x 8      (4) 32K x 8       (1) 16K/32K x 8

     256KB (B)       (4) 64K x 8          None          (1) 16K/32K x 8

                        CACHE JUMPER CONFIGURATION

      Size               JS1               JS2                 JS3

      128KB           Pins 2 & 3        Pins 2 & 3      Pins 2 & 3 closed
                       closed             closed

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

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

                          CPU TYPE CONFIGURATION

         Type                JC4              JC5               JC6

       80486SX            Pins 2 & 3       Pins 4 & 5          Open
                           closed            closed

      SL80486SX           Pins 2 & 3       Pins 5 & 6          Open
                           closed            closed

       80486DX          Pins 1 & 2, 3      Pins 4 & 5        Pins 3 & 4
                         & 4 closed          closed           closed

      SL80486DX         Pins 1 & 2, 3      Pins 5 & 6        Pins 3 & 4
                         & 4 closed          closed           closed

         CXM7           Pins 1 & 2, 3     Pins 1 & 2, 4      Pins 3 & 4
                         & 4 closed        & 5 closed         closed

  AM486DX2-80 (3.3v)    Pins 1 & 2, 3     Pins 2 & 3, 4      Pins 3 & 4
                         & 4 closed        & 5 closed         closed

   AM486DX2-80 (5v)     Pins 1 & 2, 3      Pins 4 & 5        Pins 3 & 4
                         & 4 closed          closed           closed

       80486DX2         Pins 1 & 2, 3      Pins 4 & 5        Pins 3 & 4
                         & 4 closed          closed           closed

      SL80486DX2        Pins 1 & 2, 3      Pins 5 & 6        Pins 3 & 4
                         & 4 closed          closed           closed

       AM486DX4         Pins 1 & 2, 3      Pins 4 & 5        Pins 3 & 4
                         & 4 closed          closed           closed

       80486DX4         Pins 1 & 2, 3      Pins 5 & 6        Pins 3 & 4
                         & 4 closed          closed           closed

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

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

                      CPU TYPE CONFIGURATION (CON'T)

        Type                JC7               JC8              JC10

       80486SX              Open           Pins 4 & 5          Open
                                            closed

      SL80486SX          Pins 5 & 6        Pins 4 & 5          Open
                           closed           closed

       80486DX              Open           Pins 4 & 5          Open
                                            closed

      SL80486DX          Pins 5 & 6        Pins 4 & 5          Open
                           closed           closed

        CXM7           Pins 2 & 3, 4 &     Pins 4 & 5          Open
                          5 closed          closed

  AM486DX2-80 (3.3v)        Open           Pins 4 & 5          Open
                                            closed

  AM486DX2-80 (5v)          Open           Pins 4 & 5          Open
                                            closed

      80486DX2              Open           Pins 4 & 5          Open
                                            closed

     SL80486DX2          Pins 5 & 6        Pins 4 & 5          Open
                           closed           closed

      AM486DX4              Open           Pins 4 & 5          Open
                                            closed

      80486DX4           Pins 5 & 6        Pins 4 & 5          Open
                           closed           closed

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

        P24T             Pins 5 & 6        Pins 4 & 5          Open
                           closed           closed

[Image]

                      CPU TYPE CONFIGURATION (CON'T)

                Type                               JC5/6/7/8

              SL80486SX                   JC5 pin 1/JC6 pin 1 & JC7 pin
                                                  1/JC8 pin 1

              SL80486DX                   JC5 pin 1/JC6 pin 1 & JC7 pin
                                                  1/JC8 pin 1

             SL80486DX2                   JC5 pin 1/JC6 pin 1 & JC7 pin
                                                  1/JC8 pin 1

              80486DX4                    JC5 pin 1/JC6 pin 1 & JC7 pin
                                                  1/JC8 pin 1

                P24D                      JC5 pin 1/JC6 pin 1 & JC7 pin
                                                  1/JC8 pin 1

                P24T                      JC5 pin 1/JC6 pin 1 & JC7 pin
                                                  1/JC8 pin 1

  Note: See above figure for jumper placement.

      CPU TYPE CONFIGURATION

      Type             JK5

  All CPU types       Closed

    P24C only          Open

          CPU TYPE CONFIGURATION

        Type                 JC1

    All CPU types     Pins 1 & 2 closed

     CX M7 only       Pins 2 & 3 closed

                          CPU SPEED CONFIGURATION

      Speed           JK1        JK2         JK3              JK4

      25MHz          1 & 2      2 & 3       2 & 3      1 & 6, 4 & 9, 5 &
                                                              10

      33MHz          1 & 2      2 & 3       2 & 3      1 & 6, 2 & 7, 3 &
                                                       8, 4 & 9, 5 & 10

      40MHz          2 & 3      4 & 5       2 & 3        2 & 7, 4 & 9

      50iMHz         1 & 2      2 & 3       2 & 3      1 & 6, 4 & 9, 5 &
                                                              10

    50iMHz (CX       2 & 3      4 & 5       2 & 3        4 & 9, 5 & 10
      only)

      50MHz          2 & 3      1 & 2       1 & 2        1 & 6, 4 & 9

      66iMHz         1 & 2      2 & 3       2 & 3      1 & 6, 2 & 7, 3 &
                                                       8, 4 & 9, 5 & 10

      75iMHz         1 & 2      2 & 3       2 & 3      1 & 6, 4 & 9, 5 &
                                                              10

      80iMHz         2 & 3      4 & 5       2 & 3        2 & 7, 4 & 9

     100iMHz         1 & 2      2 & 3       2 & 3      1 & 6, 2 & 7, 3 &
                                                       8, 4 & 9, 5 & 10

  Note: Pins designated should be in the closed position.

                         CPU VOLTAGE CONFIGURATION

               Voltage                                J50

          With auto detect              Pins 1 & 7, 2 & 8, 3 & 9 closed

                3.3v                    Pins 1 & 7, 2 & 8, 3 & 9 closed

                 5v                    Pins 4 & 10, 5 & 11, 6 & 12 closed

