nxr3.asm

包含很多有用的程序

cseg    segment para'code'
        assume   cs:cseg
gensound   proc   far
            push   ax
            push   bx
            push   cx
            push   dx
            push   di
            mov   al,0b6h
            out   43h,al
            mov    dx,12h
            mov    ax,348ch
            div   di
            out   42h,al
            mov    al,ah
            out   42h,al
            in   al,61h
            mov   ah,al
            or    al,3
            out   62h,al
wait1:        mov   cx,2800
delay:       loop   delay
             dec    bx
             jnz   wait1
             mov    al,ah
             out   61h,al
             pop   di
             pop   dx
             pop   cx
             pop   bx
             pop   ax
             ret
  gensound   endp
  cseg      ends
               end