
COMPUTREND SYSTEMS, INC.

PCI486 AL2

Processor  UMC486SX/80486SX/SL80486SX/UMC486DX/AM486DX/80486DX/
           SL80486DX/CX486DX2/AM486DX2/80486DX2/SL80486DX2/AM486DX4/ 80486DX4/P24D/P24T
Processor  25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)MHz
Speed
Chip Set   ALI
Max.       64MB
Onboard
DRAM
Cache      128/256/512KB
BIOS       AMI
Dimensions 270mm x 220mm
I/O        32-bit PCI slots (3), floppy drive interface, green PC connector, IDE
Options    interfaces (2), parallel port, serial ports (2)
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose               Location      Purpose                 Location

  Serial port 1            CN1        Turbo LED             JFP pins 12 &
                                                                 13

  Serial port 2            CN2        Turbo switch          JFP pins 15 -
                                                                 17

  Parallel port            CN3        Reset switch          JFP pins 19 &
                                                                 20

  Floppy drive             CN4        IDE interface LED         JFPA
  interface

  IDE interface 2          CN5        Chassis fan power         JFAN

  IDE interface 1          CN6        Green PC connector        JG1
                                      (monitor)

  External battery         JB1        Green PC LED              JG2

  Power LED &          JFP pins 1 -   Green PC connector        JG3
  keylock                   5

  Speaker              JFP pins 7 -   32-bit PCI slots       PC1 - PC3
                           10

  Note: The location of JFAN is unidentified.

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     Battery type select internal            JB1           Pins 2 & 3
                                                              closed

      Battery type select external            JB1             Closed

                            DRAM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2         Bank 3

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

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

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

     12MB       (1) 1M x 36    (1) 1M x 36    (1) 1M x 36       None

     24MB       (1) 1M x 36    (1) 1M x 36    (1) 4M x 36       None

     16MB       (1) 1M x 36    (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

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

     16MB       (1) 4M x 36        None          None           None

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

     48MB       (1) 4M x 36    (1) 4M x 36    (1) 4M x 36       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/32 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

       512KB         (4) 128K x 8          None           (1) 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

      512KB           Pins 2 & 3        Pins 1 & 2      Pins 1 & 2 closed
                       closed             closed

                          CPU TYPE CONFIGURATION

       Type             JC1           JC2          JC3            JC4

     UMC486SX          2 & 3         2 & 3         Open          1 & 2

      80486SX           Open         2 & 3         Open          Open

     SL80486SX          Open         2 & 3         Open          2 & 3

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

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

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

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

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

  AM486DX2 (V8B)       2 & 3       1 & 2, 3 &   1 & 2 5 & 6      2 & 3
                                       4

  AM486DX2 (V8T)       2 & 3       1 & 2, 3 &      Open          Open
                                       4

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

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

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

  SL80486DX2 (OD)      1 & 2       1 & 2, 3 &      Open          2 & 3
                                       4

  AM486DX4 (V8B)       2 & 3       1 & 2, 3 &   1 & 2 5 & 6      2 & 3
                                       4

  AM486DX4 (V8T)       2 & 3       1 & 2, 3 &      Open          Open
                                       4

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

       P24D            2 & 3       1 & 2, 3 &     1 & 2          2 & 3
                                       4

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

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

       Type          JC5        JC6        JC7        JC8          JC9

     UMC486SX       1 & 2      1 & 2      1 & 2      Closed       Open

     80486SX        1 & 2       Open      1 & 2       Open        Open

    SL80486SX       2 & 3      2 & 3      1 & 2      Closed       Open

     UMC486DX       1 & 2      1 & 2      1 & 2      Closed       Open

     AM486DX        1 & 2       Open      1 & 2       Open        Open

     80486DX        1 & 2       Open      1 & 2       Open        Open

    SL80486DX       2 & 3      2 & 3      1 & 2      Closed       Open

     CX486DX2       4 & 5      4 & 5      1 & 2      Closed       Open

  AM486DX2 (V8B)    2 & 3      2 & 3      2 & 3,     Closed       Open
                                          4 & 5

  AM486DX2 (V8T)    1 & 2       Open      1 & 2       Open        Open

     AM486DX2       1 & 2       Open      1 & 2       Open        Open

     80486DX2       1 & 2       Open      1 & 2       Open        Open

    SL80486DX2      2 & 3      2 & 3      1 & 2      Closed       Open

  SL80486DX2 (OD)   2 & 3      2 & 3      1 & 2      Closed       Open

  AM486DX4 (V8B)    2 & 3      2 & 3      2 & 3,     Closed       Open
                                          4 & 5

  AM486DX4 (V8T)    1 & 2       Open      1 & 2       Open        Open

     80486DX4       2 & 3      2 & 3      1 & 2      Closed       Open

       P24D         2 & 3      2 & 3      2 & 3,     Closed       Open
                                          4 & 5

       P24T         2 & 3      2 & 3      2 & 3,     Closed       Open
                                          4 & 5

  Note: Pins designated should be in the closed position.

                          CPU SPEED CONFIGURATION

      Speed               JK1                JK2                JK3

      25MHz              Open             Pins 2 & 3           Open
                                           closed

      33MHz         Pins 1 & 2, 3 &       Pins 2 & 3           Open
                       4 closed            closed

      40MHz            Pins 1 & 2         Pins 1 & 2          Closed
                        closed             closed

      50iMHz             Open             Pins 2 & 3           Open
                                           closed

      66iMHz        Pins 1 & 2, 3 &       Pins 2 & 3           Open
                       4 closed            closed

      75iMHz             Open             Pins 2 & 3           Open
                                           closed

      80iMHz           Pins 1 & 2         Pins 1 & 2          Closed
                        closed             closed

     100iMHz        Pins 1 & 2, 3 &       Pins 2 & 3           Open
                       4 closed            closed

                         CPU VOLTAGE CONFIGURATION

         Voltage                    J4                       JP8

            3.45v          Pins 4 & 10, 5 & 11, 6           Open
                                & 12 closed

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

            5v            Pins 1 & 7, 2 & 8, 3 &           Open
                                 9 closed

                DMA CONFIGURATION

   DMA       JP17     JP18      JP23      JP24

  DMA 1     Closed   Closed     Open      Open

  DMA 3      Open     Open     Closed    Closed

