
DEICO ELECTRONICS, INC.

486DSX

Processor              80486SX/80486DX
Processor Speed        20/25/33MHz
Chip Set               OPTI
Max. Onboard DRAM      32MB
Cache                  64/256KB
BIOS                   AMI
Dimensions             330mm x 218mm
I/O Options            Parallel port, serial ports (2), floppy drive
                       interface, IDE interface
NPU Options            4167

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  Reset switch              J1         Serial port 1            J21

  Turbo LED            J2 pins 1 & 2   Serial port 2            J22

  Turbo switch         J2 pins 3 & 4   Power LED &              J23
                                       keylock

  External battery         J10         Speaker                  J24

  Floppy drive             J19         Parallel port            J27
  interface

  IDE interface            J20         IDE interface LED        J28

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color                JP1           pins 1 & 2
                                                              closed

      Monitor type select monochrome           JP1           pins 2 & 3
                                                              closed

     CMOS battery select internal             JP2           pins 1 & 2
                                                              closed

      CMOS battery select external             JP2           pins 2 & 3
                                                              closed

     Factory configured - do not alter        JP3           pins 1 & 2
                                                              closed

     System clock speed select OSC/2          JP4           pins 2 & 3
                                                              closed

      System clock speed select OSC/1          JP4           pins 1 & 2
                                                              closed

     CMOS memory normal operation            JP14           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP14           pins 2 & 3
                                                              closed

     IRQ4 select serial port 1 (J21)         JP15           pins 2 & 3
                                                              closed

      IRQ4 select serial port 2 (J22)         JP15           pins 1 & 2
                                                              closed

      IRQ4 disabled                           JP15           pins 3 & 4
                                                              closed

      IRQ3 select serial port 1 (J21)         JP16           pins 2 & 3
                                                              closed

     IRQ3 select serial port 2 (J22)         JP16           pins 1 & 2
                                                              closed

      IRQ3 disabled                           JP16           pins 3 & 4
                                                              closed

      IRQ9 select serial port 1 (J21)         JP17           pins 2 & 3
                                                              closed

      IRQ9 select serial port 2 (J22)         JP17           pins 1 & 2
                                                              closed

     IRQ9 disabled                           JP17           pins 3 & 4
                                                              closed

      IRQ5 select serial port 1 (J21)         JP18           pins 2 & 3
                                                              closed

      IRQ5 select serial port 2 (J22)         JP18           pins 1 & 2
                                                              closed

     IRQ5 disabled                           JP18           pins 3 & 4
                                                              closed

     Parallel port (J27) select IRQ7         JP19           pins 1 & 2
                                                              closed

      Parallel port (J27) select IRQ5         JP19           pins 2 & 3
                                                              closed

      Parallel port (J27) select no           JP19           pins 3 & 4
      interrupt                                               closed

     IDE on-board interface enabled          JP25           pins 1 & 2
                                                              closed

      IDE on-board interface disabled         JP25           pins 2 & 3
                                                              closed

     Floppy on-board interface enabled       JP26           pins 1 & 2
                                                              closed

      Floppy on-board interface               JP26           pins 2 & 3
      disabled                                                closed

     Serial port 1 (J21) select COM1         JP27           pins 1 & 2
                                                              closed

      Serial port 1 (J21) select COM3         JP27           pins 2 & 3
                                                              closed

      Serial port 1 (J21) disabled            JP27           pins 3 & 4
                                                              closed

     Serial port 2 (J22) select COM2         JP28           pins 1 & 2
                                                              closed

      Serial port 2 (J22) select COM4         JP28           pins 2 & 3
                                                              closed

      Serial port 2 (J22) disabled            JP28           pins 3 & 4
                                                              closed

     Parallel port (J27) select LPT1         JP29           pins 1 & 2
                                                              closed

      Parallel port (J27) select LPT2         JP29           pins 2 & 3
                                                              closed

      Parallel port (J27) disabled            JP29           pins 3 & 4
                                                              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) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

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

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

     CACHE CONFIGURATION

     Size          Bank 0

     64KB        (8) 8K x 8

     256KB      (8) 32K x 8

                  CACHE JUMPER CONFIGURATION

        Size                 JP9                  JP10

        64KB           pins 2 & 3 closed   pins 2 & 3 closed

        256KB          pins 1 & 2 closed   pins 1 & 2 closed

                          CPU TYPE CONFIGURATION

       Type               JP5               JP6                JP7

     80486SX           pins 3 & 4        pins 3 & 4         pins 3 & 4
                        closed             closed             closed

     80487SX           pins 2 & 3        pins 2 & 3         pins 2 & 3
                        closed             closed             closed

     80486DX           pins 1 & 2        pins 1 & 2         pins 1 & 2
                        closed             closed             closed

