王爽《汇编语言》实验十(3)

assem_exp10_3.asm

assume cs:code, ss:stack, ds:data

data segment
  dd 10h dup (0)
data ends


stack segment
  dd 10h dup (0)
stack ends


code segment
 start:	
 	mov ax, stack
 	mov ss, ax
 	mov sp, 40h
 	
 	mov ax, 12666
 	mov bx, data
 	mov ds, bx
 	mov si, 0
 	mov di, si
 	call dtoc
 	
 	mov dh, 8
 	mov dl, 3
 	mov cl, 2
 	
 	call show_str
 	
 	mov ah, 4ch
 	int 21h
 	
 dtoc:	;push si
 	mov bx, 10
 	mov dx, 0
 	mov ch, 0
 change:
 	div bx
 	add dx, 30h
 	mov byte ptr ds:[si], dl
 	mov dx, 0
 	;push ax
 	mov cl,al
 	jcxz ok_convert
 	inc si
 	jmp change
 ok_convert:	
 	;pop si
 	;push si
 	mov si, di
 	mov ax, 0
 	push ax
 reverse_push:
 	mov al, ds:[si]
 	mov ah, 0
 	mov cx, ax
  	jcxz ok_rpop
  	push ax
 	inc si
 	jmp reverse_push
 ok_rpop:
 	mov si, di
 reverse_pop:
 	pop ax
 	mov byte ptr ds:[si], al
 	mov cx, ax
 	jcxz ok_all
 	inc si
 	jmp reverse_pop
 ok_all:	
 	ret
 
 show_str:
 	ret
code ends
end start