binihex.asm

来自「这是一个电话号码程序」· 汇编 代码 · 共 61 行

decihex segment
assume cs:decihex
main proc far 
repeat:call decibin
	call crlf
	call binihex
	call crlf
	jmp repeat
main endp

decibin proc near
mov bx,0
newchar:
mov ah,1
int 21h
sub al,30h
jl exit
cmp al,9d
jg exit
cbw
xchg ax,bx
mov cx,10d
mul cx
xchg ax,bx
add bx,ax
jmp newchar
exit:
ret
decibin endp

binihex proc near
mov ch,4
rotate:
mov cl,4
rol bx,cl
mov al,bl
and al,0fh
add al,30h
cmp al,3ah
jl printit
add al,7h
printit:
mov dl,al
mov ah,2
int 21h
dec ch
jnz rotate
ret
binihex endp

crlf proc near
mov al,0dh
mov ah,2
int 21h
mov dl,0ah
mov ah,2
int 21h
ret 
crlf endp
decihex ends
end main