
DIAMOND FLOWER, INC.

486SX-20/25UNB AIO

Processor                 80486SX/80487SX
Processor Speed           20/25MHz
Chip Set                  UMC
Max. onboard DRAM         16MB
Cache                     None
BIOS                      AMI
Dimensions                330mm x 218mm
I/O Options               Floppy drive interface, IDE interface, parallel
                          port, PS/2 mouse port, serial port (2), VGA
                          feature connector, VGA port
NPU Options               None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  IDE interface               CN1      Turbo switch              J3 & J8

  Floppy drive interface      CN2      Reset switch              J4 & J9

  VGA feature connector       CN3      IDE interface LED           J5

  VGA port                    CN4      Power LED & keylock         J6

  Parallel port               CN5      Speaker                     J7

  Bus mouse port              CN6      External battery            J10

  Serial port (COM1)          CN7      Serial port (COM2)         JP31

  Keyboard connector          J1       Keyboard connector         KBD1

  Turbo LED                   J2       Riser card                  S1

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

     Battery select internal                  J11           pins 2 & 3
                                                              closed

      Battery select external                  J11           pins 1 & 2
                                                              closed

     Speaker select internal                  JP1            Closed

      Speaker select external                  JP1             Open

     Factory configured - do not alter        JP4             Open

     Factory configured - do not alter        JP5           pins 2 & 3
                                                              closed

      CPU speed select 20MHz                   JP6            Closed

      CPU speed select 25MHz                   JP6             Open

     Factory configured - do not alter        JP7             Open

     BIOS type select 27C256 (32KB)           JP8           pins 2 & 3
                                                              closed

      BIOS type select 27C512 (64KB)           JP8           pins 1 & 2
                                                              closed

     Factory configured - do not alter        JP10            Open

     Monitor type select color                JP11           Closed

      Monitor type select monochrome           JP11            Open

     Factory configured - do not alter        JP13            Open

     Factory configured - do not alter        JP14           Closed

     Floppy drive interface enabled           JP20          pins 1 & 2
                                                              closed

      Floppy drive interface disabled          JP20          pins 2 & 3
                                                              closed

     Factory configured - do not alter        JP21          pins 1 & 2
                                                              closed

     IDE interface enabled                    JP22          pins 1 & 2
                                                              closed

      IDE interface disabled                   JP22          pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB         (1) 256K x       NONE           NONE           NONE
                    36

     2MB         (1) 256K x    (1) 256K x        NONE           NONE
                    36             36

     3MB         (1) 256K x    (1) 256K x     (1) 256K x        NONE
                    36             36             36

     4MB         (1) 256K x    (1) 256K x     (1) 256K x    (1) 256K x 36
                    36             36             36

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

     5MB         (1) 256K x   (1) 1M x 36        NONE           NONE
                    36

     6MB         (1) 256K x    (1) 256K x    (1) 1M x 36        NONE
                    36             36

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

     9MB         (1) 256K x   (1) 1M x 36    (1) 1M x 36        NONE
                    36

     10MB        (1) 256K x    (1) 256K x    (1) 1M x 36     (1) 1M x 36
                    36             36

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

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

                         SERIAL PORT CONFIGURATION

   Port 1 (C2)      Port 2 (C1)      JP17          JP18          JP19

        COM1          COM2       pins 1 & 2     pins 1 & 2    pins 1 & 2
                                    closed        closed        closed

         COM1        Disabled     pins 1 & 2     pins 2 & 3    pins 1 & 2
                                    closed        closed        closed

       Disabled        COM2       pins 2 & 3     pins 1 & 2    pins 1 & 2
                                    closed        closed        closed

         `COM2       Disabled     pins 1 & 2     pins 2 & 3    pins 2 & 3
                                    closed        closed        closed

         COM2          COM1       pins 1 & 2     pins 1 & 2    pins 2 & 3
                                    closed        closed        closed

       Disabled        COM1       pins 2 & 3     pins 1 & 2    pins 2 & 3
                                    closed        closed        closed

       Disabled      Disabled     pins 2 & 3     pins 2 & 3      Open
                                    closed        closed

          SERIAL PORTS 1 &AMP; 2 NORMAL/FORCED TRUE CONFIGURATION

    Port 1       Port 2         JP24            JP25            JP26
    (CN7)        (JP31)

   Normal        Normal       pins 1 & 2      pins 1 & 2      pins 1 & 2
                               closed          closed          closed

    Forced     Forced true    pins 2 & 3      pins 2 & 3      pins 2 & 3
    true                       closed          closed          closed

                     SERIAL PORT DTE/DCE CONFIGURATION

                Function                                JP30

          Serial Port 1 (CN7) DTE          Pins 1 & 2, 3 & 4, and 5 & 6
                                                       closed

            Serial Port 1 (CN7)DCE          Pins 1 & 3, 2 & 4, and 6 & 8
                                                       closed

                     SERIAL PORT DTE/DCE CONFIGURATION

                Function                               JP23

         Serial Port 2 (JP23) DTE         Pins 7 & 8 and 9 & 10 closed

          Serial Port 2 (JP23) DCE         Pins 5 & 7 and 9 & 10 closed

                    PARALLEL PORT 1 (CN5) CONFIGURATION

     LPT        I/O Address    Interrupt       JP9      JP15       JP16

    LPT 1        3BC-3BEh         IRQ7        pins 1    pins 2   pins 1 &
                                               & 2       & 3        2

    LPT 2        378-37Ah         IRQ7        pins 1    pins 1   pins 1 &
                                               & 2       & 2        2

    LPT 3        278-27Ah         IRQ5        pins 2    pins 1   pins 2 &
                                               & 3       & 2        3

   Disabled        N/A            N/A          N/A      pins 2   pins 2 &
                                                         & 3        3

  Note:Pins designated should be in the closed position.

           VRAM CONFIGURATION

     Size         VRAM        Location

    512KB       (4) 44256      Bank 0

    1024KB      (8) 44256    Bank 0 & 1

                         ONBOARD VGA CONFIGURATION

        Mode            IRQ          JP2           JP3           JP12

        Enabled        2/9       pins 2 & 3    pins 1 & 2      Closed
                                   closed         closed

        Disabled        2/9        Closed          Open          Open

