
DD & TT ENTERPRISE USA COMPANY

DT-LB2AL

Processor         80386DX/CX486DLC/80486SX/80487SX/80486DX

                  ODP486SX/80486DX2/ODP586SX
Processor Speed   20/25/33/40/50(internal)/50/66(internal) MHz
Chip Set          Symphony
Max. onboard DRAM 32MB
Cache             64/256KB
BIOS              AMI
Dimensions        330mm x 220mm
I/O Options       Floppy drive interface, game port, IDE interface,
                  parallel port,

                  PS/2 mouse port, serial ports (2), VGA feature
                  connector,

                  VGA port
NPU Options       80387DX/CX487DLC

[Image]

                                CONNECTIONS

  Purpose               Location       Purpose               Location

  VGA port                 C1          IDE interface            J12

  Parallel port            C2          Speaker             J13/pins 1, 3,
                                                               5, 7

  Serial port B            C3          Power LED &         J13/pins 2, 4,
                                       keylock               6, 8, 10

  Serial port A            C4          Reset switch       J14/pins 1 & 2

  PS/2 mouse port          C5          Turbo switch       J14/pins 3 & 4

  Game port                J9          Turbo LED          J14/pins 5 & 6

  VGA feature              J10         IDE interface LED  J14/pins 7 & 8
  connector

  Floppy drive             J11         Riser card               S1
  interface

                        USER CONFIGURABLE SETTINGS

              Function                    Jumper           Position

     PS/2 mouse port enabled               E9               Open

      PS/2 mouse port disabled              E9              Closed

     CMOS memory normal operation         E13               Open

      CMOS memory clear                    E13              Closed

     Onboard speaker enabled              J13         pins 1 & 3 closed

      Onboard speaker disabled             J13          pins 1 & 3 open

                     SERIAL PORT A (C4) CONFIGURATION

      COM         Interrupt   Address     E2/pins     E2/pins   E2/Pins 7
                                          1, 3, &     2, 4, &      & 8
                                             5          6

       COM1        IRQ4        3F8h      pins 3 &   pins 2 &    Closed
                                          5 closed   4 closed

        COM3        IRQ4        3E8h      pins 1 &   pins 4 &    Closed
                                          3 closed   6 closed

        COM4        IRQ3        2E8h      pins 3 &   pins 4 &     Open
                                          5 closed   6 closed

      Disabled       N/A        N/A       pins 1 &   pins 2 &     Open
                                          3 closed   4 closed

                     SERIAL PORT B (C3) CONFIGURATION

      COM         Interrupt   Address     E1/pins     E1/pins   E1/Pins 7
                                          1, 3, &     2, 4, &      & 8
                                             5          6

       COM2        IRQ3        2F8h      pins 3 &   pins 2 &    Closed
                                          5 closed   4 closed

        COM3        IRQ4        3E8h      pins 1 &   pins 4 &    Closed
                                          3 closed   6 closed

        COM4        IRQ3        2E8h      pins 3 &   pins 4 &     Open
                                          5 closed   6 closed

      Disabled       N/A        N/A       pins 1 &   pins 2 &     Open
                                          3 closed   4 closed

                       PARALLEL PORT (C2) CONFIGURATION

      LPT       Interrupt   Address   E4/1,3,&5   E4/2,4,&6   E4/7&8   E4/9&10

      LPT1       IRQ7       378h      pins 3 &    pins 2 &   Closed    Open
                                          5           4

       LPT1       IRQ5       378h      pins 3 &    pins 2 &   Open     Closed
                                          5           4

       LPT2       IRQ7       278h      pins 1 &    pins 2 &   Closed    Open
                                          3           4

       LPT2       IRQ5       278h      pins 1 &    pins 4 &   Open     Closed
                                          3           6

       LPT3       IRQ7       278h      pins 1 &    pins 4 &   Closed    Open
                                          3           6

       LPT3       IRQ5       278h      pins 1 &    pins 4 &   Open     Closed
                                          3           6

      Disabled     N/A        N/A      pins 1 &    pins 2 &   Open      Open
                                          3           4

      Notes:Pins designated should be in the closed position.

      In order for LPT3 to be selected, a Hercules monographics card with an
      active parallel port must be present.

                   FLOPPY DRIVE INTERFACE CONFIGURATION

              I/O Address                    E3/pins 1, 3, 5, 7, 9, 11

                  3F0-3F7                   pins 3 & 5, 7 & 9 closed

                   370-377                   pins 3 & 5, 9 & 11 closed

                  Disabled                       pins 1 & 3 closed

                        IDE INTERFACE CONFIGURATION

              I/O Address                   E3/pins 2, 4, 6, 8, 10, 12

             3F0-3F7, 1F0-1F7               pins 4 & 6, 8 & 10 closed

              370-377, 170-177              pins 4 & 6, 10 & 12 closed

                  Disabled                       pins 2 & 4 closed

                      ONBOARD VGA PORT CONFIGURATION

              Function                   Jumper            Position

     Onboard VGA enabled                  E6          pins 1 & 2, 3 & 4
                                                            closed

      Onboard VGA disabled                 E6          pins 1 & 2, 3 & 4
                                                             open

     Onboard VGA memory 512KB             E6         pins 13 & 14 closed

      Onboard VGA memory 1MB               E6          pins 13 & 14 open

         ONBOARD VGA VIDEO MODE CONFIGURATION (800X600 RESOLUTION)

   Refresh Rate           Mode         E6/pins 9 & 10    E6/pins 11 & 12

       56Hz          Non-Interlaced         Open               Open

       56Hz          Non-Interlaced        Closed             Closed

       60Hz          Non-Interlaced        Closed              Open

       72Hz          Non-Interlaced         Open              Closed

     ONBOARD VGA VIDEO MODE CONFIGURATION (1024 X 768 RESOLUTION)

   Refresh Rate         Mode          E6/pins 5 & 6    E6/pins 7 & 8

      43.5Hz         Interlaced           Open              Open

      43.5Hz         Interlaced          Closed            Closed

       60Hz        Non-Interlaced        Closed             Open

       70Hz        Non-Interlaced         Open             Closed

                            BIOS CONFIGURATION

              Function                   Jumper            Position

     BIOS ROM 1MB                         E5          pins 1 & 3 closed

      BIOS ROM 2MB                         E5          pins 3 & 5 closed

     Flash BIOS program mode              E5          pins 2 & 4, 7 & 9,
      enabled                                               8 & 10

      Flash BIOS program mode              E5         pins 4 & 5, 9 & 11,
      disabled                                              10 & 12

                      CACHE CONFIGURATION

      Size       Max Cachable        Cache           TAG

      64KB            8MB         (8) 8K x 8     (1) 32K x 8

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

                        CACHE JUMPER CONFIGURATION

                Size                                 E11

                64KB                       pins 3 & 5, 4 & 6 closed

               256KB                   pins 1 & 3, 2 & 4, 7 & 8, 9 & 10,
                                                11 & 12 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) 1M x 9     (4) 256K x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      17MB        (4) 256K x 9    (4) 4M x 9

      20MB        (4) 1M x 9      (4) 4M x 9

      32MB        (4) 4M x 9      (4) 4M x 9

                          CPU TYPE CONFIGURATION

         CPU Type                   E10                     E14

     80386DX PQFP/PGA        pins 3 & 4, 9 & 11,            N/A
                                  10 & 12

       80486SX PQFP          pins 1 & 2, 5 & 6,      pins 1 & 2 closed
                               7 & 9, 8 & 10

        80486SX PGA          pins 1 & 2, 5 & 6,      pins 2 & 3 closed
                               7 & 9, 8 & 10

        80487SX PGA          pins 1 & 2, 5 & 6,    pins 1 & 2, 3 & 4, 7 &
                               7 & 9, 8 & 10             8 closed

       ODP486SX PGA          pins 1 & 2, 5 & 6,    pins 1 & 2, 3 & 4, 7 &
                               7 & 9, 8 & 10             8 closed

       80486DX PQFP          pins 1 & 2, 5 & 6,    pins 1 & 2, 3 & 4, 5 &
                               7 & 9, 8 & 10             6 closed

        80486DX PGA          pins 1 & 2, 5 & 6,    pins 1 & 2, 3 & 4, 5 &
                               7 & 9, 8 & 10             6 closed

       80486DX2 PGA          pins 1 & 2, 5 & 6,    pins 1 & 2, 3 & 4, 5 &
                               7 & 9, 8 & 10             6 closed

       ODP586SX PGA          pins 1 & 2, 5 & 6,    pins 1 & 2, 3 & 4, 5 &
                               7 & 9, 8 & 10             6 closed

  Note:Pins designated should be in the closed position.

                          CPU SPEED CONFIGURATION

     CPU Speed              E7               E8                E12

       20MHz            pins 1 & 2       pins 1 & 2       pins 3 & 5, 4 &
                                                                6

       25MHz            pins 1 & 2     pins 3 & 4, 5 &    pins 3 & 5, 4 &
                                              6                 6

       33MHz            pins 1 & 2       pins 3 & 4       pins 3 & 5, 4 &
                                                                6

       40MHz            pins 1 & 2       pins 5 & 6       pins 3 & 5, 4 &
                                                                6

       50MHz            pins 2 & 3     pins 3 & 4, 5 &    pins 1 & 3, 2 &
                                              6                 4

  Note:Pins designated should be in the closed position.

