求助!汇编程序设计!谢谢拉!

data segment
info1 db 0dh,0ah,'please choose the letter y,s,z:'
db 0dh,0ah,'input q to quit','$'
info2 db 0dh,0ah,'choose error!','$'
d3 dw 0
total db 12
dotyx db 50,160
db 60,135
db 60,185
db 75,115
db 75,205
db 95,110
db 95,210
db 110,114
db 110,210
db 130,135
db 130,195
db 145,165
data ends
stack segment stack
db 200 dup(0)
stack ends
code segment
assume cs:code,ds:data,ss:stack
main proc far
mov ax,data
mov ds,ax
mov ah,0
mov al,4
int 10h
input: lea dx,info1
mov ah,9
int 21h
mov ah,08
int 21h
cmp al,'s'
jz sa
cmp al,'z'
jz zhen
cm