
HYUNDAI ELECTRONICS, INC.

CORPORATE SERIES 386/486 (VER. E & LATER)

Processor            80386DX/80486SX/80486DX
Processor Speed      20/25/33/40/50MHz
Chip Set             Northport/VLSI
Max. Onboard DRAM    64MB
Cache                64/256KB (on CPU card)
BIOS                 AMI
Dimensions           355.6mm x 304.8mm
I/O Options          Serial ports (2), parallel port, floppy drive
                     interface, IDE interface, proprietary CPU card slot
NPU Options          80387/3167/4167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                 Location

  Proprietary CPU card      CPU1       Serial port 1              J9

  External battery           J2        Serial port 2             J10

  Turbo LED                  J4        Parallel port             J15

  Power LED & keylock        J5        Floppy drive              J16
                                       interface

  Reset switch               J6        IDE interface             J17

  IDE interface LED          J8        Speaker                   J19

  Note: Although the CPU card supports a 50MHz processor, only a 40MHz
  386DX, a 20MHz 486SX, and a 33MHz 486DX version are sold by Hyundai.

                        USER CONFIGURABLE SETTINGS

               Function                   Jumper/Switch       Position

     Factory configured - do not        SW1 pins 1 & 2         Open
      alter

     Factory configured - do not        SW1 pins 3 & 4        Closed
      alter

     Factory configured - do not        SW1 pins 5 & 6        Closed
      alter

     Video BIOS shadowing enabled       SW1 pins 7 & 8        Closed

      Video BIOS shadowing disabled      SW1 pins 7 & 8         Open

     SCSI BIOS shadowing disabled       SW1 pins 9 & 10        Open

      SCSI BIOS shadowing enabled        SW1 pins 9 & 10       Closed

     ROM BIOS shadowing enabled        SW1 pins 11 & 12       Closed

      ROM BIOS shadowing disabled       SW1 pins 11 & 12        Open

     Serial port 2 interrupt select     SW2 pins 1 & 2        Closed
      IRQ3

      Serial port 2 interrupt select     SW2 pins 1 & 2         Open
      none

     Serial port 1 interrupt select     SW2 pins 3 & 4        Closed
      IRQ4

      Serial port 1 interrupt select     SW2 pins 3 & 4         Open
      none

     Floppy drive interface enabled     SW3 pins 1 & 2         Open

      Floppy drive interface enabled     SW3 pins 1 & 2        Closed

     Serial port 2 select COM2/2F8h     SW3 pins 3 & 4         Open

      Serial port 2 disabled             SW3 pins 3 & 4        Closed

     Serial port 1 select COM1/3F8h     SW3 pins 5 & 6         Open

      Serial port 1 disabled             SW3 pins 5 & 6        Closed

     BIOS cache location select              SW4/3              On
      486DX internal cache

      BIOS cache location select              SW4/3              Off
      external cache

     BIOS (E000-EFFFh) shadowing             SW4/4              On
      enabled

      BIOS (E000-EFFFh) shadowing             SW4/4              Off
      disabled

     DRAM transparent refresh                SW4/5              On
      enabled

      DRAM transparent refresh                SW4/5              Off
      disabled

     Factory configured - do not             SW5/1              Off
      alter

     Factory configured - do not             SW5/2              On
      alter

     IDE interface interrupt select          SW21               On
      IRQ14

      IDE interface interrupt select          SW21               Off
      none

     Floppy drive precompensation             W2             pins 2 & 3
      select standard                                          closed

      Floppy drive precompensation             W2             pins 1 & 2
      select alternate                                         closed

     CPU speed select                         W3             pins 2 & 3
      fast/switchable from keyboard                            closed

      CPU speed select fast                    W3               Open

      CPU speed select slow                    W3             pins 1 & 2
                                                               closed

     Monitor type select color                W4             pins 2 & 3
                                                               closed

      Monitor type select monochrome           W4             pins 1 & 2
                                                               closed

     CMOS memory normal operation             W7               Open

      CMOS memory clear                        W7              Closed

     Parallel port mode select                W13            pins 2 & 3
      bi-directional                                           closed

      Parallel port mode select                W13            pins 1 & 2
      input only                                               closed

     Floppy drive type select                 W18            pins 1 & 2
      single-speed                                             closed

      Floppy drive type select                 W18            pins 2 & 3
      dual-speed                                               closed

                    USER CONFIGURABLE SETTINGS (CON'T)

              Function                  Jumper/Switch         Position

     BIOS type select 27256                 W19             pins 2 & 3
                                                               closed

      BIOS type select 27512                 W19             pins 1 & 2
                                                               closed

     IDE interface enabled                  W20                Open

      IDE interface disabled                 W20               Closed

  Note: The locations of SW4 & SW5 are unidentified.

                            DRAM CONFIGURATION

    Size         Bank 0         Bank 1          Bank 2         Bank 3

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

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

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

    6MB       (4) 256K x 9    (4) 256K x 9    (4) 1M x 9        NONE

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

    10MB      (4) 256K x 9    (4) 256K x 9    (4) 1M x 9     (4) 1M x 9

    12MB       (4) 1M x 9     (4) 1M x 9      (4) 1M x 9        NONE

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

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

    24MB       (4) 1M x 9     (4) 1M x 9      (4) 4M x 9        NONE

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

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

    40MB       (4) 1M x 9     (4) 1M x 9      (4) 4M x 9     (4) 4M x 9

    48MB       (4) 4M x 9     (4) 4M x 9      (4) 4M x 9        NONE

    64MB       (4) 4M x 9     (4) 4M x 9      (4) 4M x 9     (4) 4M x 9

                         DRAM JUMPER CONFIGURATION

    Size            SW1             W5       W6        W28         W29

    1MB       13 & 14, 15 & 16,   2 & 3    2 & 3      Open        Open
              17 & 18, 19 & 20

    2MB       13 & 14, 17 & 18,   2 & 3    2 & 3      Open        Open
                  19 & 20

    4MB       13 & 14, 15 & 16,   1 & 2    2 & 3      Open        Open
                  17 & 18

    6MB       15 & 16, 17 & 18,   2 & 3    2 & 3      1 & 2       2 & 3
                  19 & 20

    8MB       13 & 14, 17 & 18    1 & 2    2 & 3      Open        Open

    10MB      17 & 18, 19 & 20    2 & 3    2 & 3      1 & 2       2 & 3

    12MB      15 & 16, 17 & 18    1 & 2    2 & 3      1 & 2       2 & 3

    16MB          17 & 18         1 & 2    2 & 3      1 & 2       2 & 3

    16MB      13 & 14, 15 & 16    1 & 2    2 & 3      Open        Open

    24MB      15 & 16, 19 & 20    1 & 2    2 & 3      1 & 2       1 & 2

    32MB          13 & 14         1 & 2    1 & 2      Open        Open

    36MB          15 & 16         1 & 2    1 & 2      1 & 2       2 & 3

    40MB          19 & 20         1 & 2    2 & 3      1 & 2       1 & 2

    48MB          15 & 16         1 & 2    1 & 2      1 & 2       1 & 2

    64MB            Open          1 & 2    1 & 2      1 & 2       1 & 2

  Note: Pins designated should be in the closed position.

     PARALLEL PORT IRQ CONFIGURATION

         IRQ                 SW2

        IRQ7          pins 7 & 8 closed

        IRQ5          pins 5 & 6 closed

               PARALLEL PORT CONFIGURATION

             IRQ                         SW3

          LPT1/378h                      Open

          LPT1/3BCh               pins 9 & 10 closed

          LPT2/278h               pins 7 & 8 closed

          Disabled            pins 7 & 8, 9 & 10 closed

                   NONCACHEABLE CONFIGURATION

       Setting                SW4/1                SW4/2

         None                  Off                  Off

  256KB (3D80-3E80)            Off                 Closed

  512KB (3C80-3E80)          Closed                 Off

  1024KB (3A80-3E80)           Off                  Off

  Note: The location of SW4 is unidentified.

                   BUS SPEED CONFIGURATION

       Setting               W14                  W15

     CPU speed/2       pins 2 & 3 closed        Closed

     CPU speed/4       pins 1 & 2 closed         Open

[Image]

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

     Factory configured - do not alter         W2            closed

                            SRAM CONFIGURATION

  Size     Cache     TAG      U9     SW5/switch 3   SW5/switch 4    W1

  64KB      (8)      (2)      (1)       open           open         pins
           16K x    16K x    16K x                                  1&2
             4        4       4                                     and
                                                                    3&4

  256KB     (8)      (2)      (1)      closed         closed       open
           64K x    64K x    16K x
             4        4       4

  Note: The location of SW5 on the mainboard is unknown.

  Pins designated should be in the closed position.

[Image]

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

      CPU type select 80486SX                   W6           pins 1 & 2
                                                              closed

      CPU type select 80486DX                   W6           pins 2 & 3
                                                              closed

     Factory configured - do not alter         W7            Closed

            CACHE CONFIGURATION

     Size          Bank 0          U21

     64KB        (8) 16K x 4   (1) 16K x 4

     256KB       (8) 64K x 4      NONE

                        CACHE JUMPER CONFIGURATION

     Size         SW5/3        SW5/4         W1        W2          W5

     64KB          Off          Off        2 & 3      2 & 3       Open

    256KB          On            On        1 & 2      1 & 2    3 & 4, 5 &
                                                                   6

  Note: The location of SW5 on the mainboard is unidentified. Pins
  designated should be in the closed position.

                         BURST MODE CONFIGURATION

      Setting              W3                W4                 W5

      Enabled          pins 2 & 3         pins 2 & 3        pins 1 & 2
                         closed            closed             closed

     Disabled          pins 1 & 2         pins 1 & 2           Open
                         closed            closed

