Programming complete digital display program, his school after the 8-bit number displayed on the digital pipe. (Circuit in the circuit as shown in Proteus folder) programming to complete the external buttons on the digital subtraction operation on the digital implementation, the program can use the break to do, or do with the way the query can be. Programming completed 4* 4 key determinant of the detection process, press the key number will be displayed on the digital pipe.

program\Display\Display
.......\.......\Display.hex
.......\.......\Display.lnp
.......\.......\Display.M51
.......\.......\Display.Opt
.......\.......\Display.plg
.......\.......\Display.Uv2
.......\.......\Display_Opt.Bak
.......\.......\Display_Uv2.Bak
.......\.......\main.asm
.......\.......\main.LST
.......\.......\main.OBJ
.......\Display
.......\Ex_int\EX_Int
.......\......\EX_Int.hex
.......\......\EX_Int.lnp
.......\......\EX_Int.M51
.......\......\EX_Int.Opt
.......\......\EX_Int.plg
.......\......\EX_Int.Uv2
.......\......\EX_Int_Uv2.Bak
.......\......\keyint.asm
.......\......\keyint.LST
.......\......\keyint.OBJ
.......\Ex_int
.......\Keyboard\Keyboard
.......\........\Keyboard.hex
.......\........\Keyboard.lnp
.......\........\Keyboard.M51
.......\........\Keyboard.Opt
.......\........\Keyboard.plg
.......\........\Keyboard.Uv2
.......\........\Keyboard_Uv2.Bak
.......\........\key_scan.asm
.......\........\key_scan.LST
.......\........\key_scan.OBJ
.......\Keyboard
program

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