各位帮忙啊，汇编语言程序
音乐点播程序，要求写出程序开发中遇到的问题，并写出解决方案，其实就是自问自答，问题要两个，并写出相应的解决方案。不多解释了，各位帮忙啊，不胜感激，程序如下：
;**************************************************
STACK SEGMENT PARA STACK 'STACK'
DB 64 DUP('STACK...')
STACK ENDS
;**************************************************
DSEG SEGMENT PARA 'DATA'
MESS1 DB 50 DUP(' '),'Now the music is <<Happy birthday to you>> ',13,10,'$'
MESS2 DB 50 DUP(' '),'Now the music is <<Mary had a little lamb>>',13,10,'$'
MESS3 DB 50 DUP(' '),'Now the music is <<Taihu boat>> ',13,10,'$'
MENU DB 5 DUP(13,10)
DB 5 DUP(' '),'Class:Computer 05-6 Name:lixia NO.:14 ',13,10
DB 5 DUP(''),' ',13,10
DB 5 DUP(''),' ',13,10
DB 5 DUP(' '),' ',13,10
DB 5 DUP(' '),' ~~~~~ ~~~~~~ ',13,10
DB 5 DUP(' '),' ~~~~~~~~~~~ ~~~~~~~~~~~~ ',13,10
DB 5 DUP(' '),' ~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~ ',13,10
DB 5 DUP(' '),'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ',13,10
DB 5 DUP(' '), '~~~~~~ 1:Happy birthday to you; ~~~~ ',13,10
DB 5 DUP(' '),' ~~~~~~ 2:Mary had a little lamb; ~~~~ ',13,10
DB 5 DUP(' '),' ~~~~~ 3:Taihu boat; ~~~ ',13,10
DB 5 DUP(' '),' ~~~ 4:Exit; ~~~~~~~~~~~ ',13,10
DB 5 DUP(' '),' ~~ ~~~~~~~~~~~~~~~~ ',13,10
DB 5 DUP(' '),' ~~~~~~~~~~~~~~~~~~~~~~~~ ',13,10
DB 5 DUP(' '),' ~~~~~~~~~~~~~~~~~~~~ ',13,10
DB 5 DUP(' '),' ~~~~~~~~~~~~~~~~ ',13,10
DB 5 DUP(' '),' ~~~~~~~~~~~~ ',13,10
DB 5 DUP(' '),' ~~~~~~~~ ',13,10
DB 5 DUP(' '),' ~~~~ ',13,10
DB 5 DUP(' '),' ',13,10
DB 5 DUP(' '),' ',13,10
DB 5 DUP(' '),'please chioce the number of music:','$',13,10
change DB 125 DUP(' '),'error! please change anther NO.: ','$'
MUS_FREG dw 262,262,294,262,349,330
dw 262,262,294,262,392,349
dw 262,262,523,440,349,330,294
dw 466,466,440,262,392,349
dw -1
MUS_TIME dw 50,50,100,100,100,200
dw 50,50,100,100,100,200
dw 50,50,100,100,100,100,300
dw 50,50,100,100,100,200
mus_freg1 dw 330,294,262,294,330,330,330
dw 294,294,294,330,392,392
dw 330,294,262,294,330,330,330,330
dw 294,294,330,294,262
dw -1
mus_time1 dw 6 dup(25),50
dw 2 dup(25,25,50)
dw 12 dup(25),100
mus_freg2 dw 330,392,330,294,330,392,330,294,330
dw 330,392,330,294,262,294,330,292,294
dw 262,262,220,196,196,220,262,294,330,262
dw -1
mus_time2 dw 50,50,50,25,25,50,25,25,100
dw 50,50,50,50,25,25,25,25,100
dw 50,50,50,25,25,25,25,25,25,25,100
DSEG ENDS
;**************************************************
CODE SEGMENT PARA 'DATA'
assume cs:code,ds:dseg,ss:stack
music proc far
mov ax,dseg
mov ds,ax
rotate:
call clearscreen
LEA DX,MENU
mov ah, 9

int 21h
chg:
mov ah,1
int 21h
cmp al,'1'
je one
cmp al,'2'
je two
cmp al,'3'
je three
cmp al,'4'
je endmus
LEA DX,change
mov ah, 9
int 21h
jmp chg
ONE: call clearscreen
lea dx,mess1
mov ah,09
int 21h
LEA SI,MUS_FREG
LEA BP,DS:MUS_TIME
JMP SOUND
TWO:call clearscreen
lea dx,mess2
mov ah,09
int 21h
LEA SI,MUS_FREG1
LEA BP,DS:MUS_TIME1
JMP SOUND
THREE:call clearscreen
lea dx,mess3
mov ah,09
int 21h
LEA SI,MUS_FREG2
LEA BP,DS:MUS_TIME2
SOUND:
; call q0
freq:
mov di,[si]
cmp di,-1
je rotate
mov bx,ds:[bp]
call soundf
add si,2
add bp,2
jmp freq
JMP rotate
ENDMUS:
mov ax,4c00h
int 21h
music endp
;***************************************************
soundf proc near
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 61h,al
wait1:
mov cx,663
call waitf
delay:
loop delay
dec bx
jnz wait1
mov al,ah
out 61h,al
pop di
pop dx
pop cx
pop bx
pop ax
ret
soundf endp

CLEARSCREEN PROC NEAR
MOV AH,6
MOV AL,0
MOV DL,79
MOV BH,7
MOV CH,0
MOV CL,0
MOV DH,24
int 10h
MOV DX,0
MOV AH,2
INT 10H
RET
CLEARSCREEN ENDP
q0 proc near
mov ah,2
sub bh,bh
mov dh,0
mov dl,0
int 10h
ret
q0 endp
waitf proc near
push ax
waitf1: in al,61h
and al, 10h
cmp al, ah
je waitf1
mov ah,al
loop waitf1
pop ax
ret
waitf endp
;***************************************************
code ends
end music


[解决办法]
你遇到什么问题
[解决办法]
额，这个嘛……
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