搞不懂了,没道理出问题的,老大帮忙看看(关于控制8253发声)
code segment
assume cs:code,ds:code
ORG 100h
start:
mov di,262h
mov bx,20h
mov al,0b6h
out 43h,al
mov dx,12h
mov ax,34dch
div di
out 42h,al
mov al,ah
out 42h,al
in al,61h
mov ah,al
or al,3
out 61h,al
wai:
mov cx,2801h
delay: loop delay
dec bx
jnz wai
mov al,ah
out 61h,al
code ends
end start