逆风编程精品
input: mov ah,02h
mov bh,00h
mov dh,22d
mov dl,33d
int 10h

mov ah,0ah
mov al," "
mov bh,00h
mov cx,01h
int 10h

mov ah,01h
int 21h
retry: cmp al,"1"
je speed1
cmp al,"2"
je speed2
cmp al,"3"
je speed3
cmp al,"4"
je speed4
cmp al,"5"
je speed5
cmp al,"6"
je speed6
cmp al,1bh
je to_over0
jmp input

to_over0:jmp over

speed1: mov ah,01h
int 21h
cmp al,0dh
jne otherkey
mov ax,speed 2
mov speed,ax
jmp begin

speed2: mov ah,01h
int 21h
cmp al,0dh
jne otherkey
mov ax,speed 4
mov speed,ax
jmp begin

speed3: mov ah,01h
int 21h
cmp al,0dh
jne otherkey
mov ax,speed 6
mov speed,ax
jmp begin

speed4: mov ah,01h
int 21h
cmp al,0dh
jne otherkey
mov ax,speed 8
mov speed,ax
jmp begin

speed5: mov ah,01h
int 21h
cmp al,0dh
jne otherkey
mov ax,speed 10
mov speed,ax
jmp begin

speed6: mov ah,01h
int 21h
cmp al,0dh
jne otherkey
mov ax,speed 12
mov speed,ax
jmp begin

otherkey: ; 处理重复输入的代码段

push ax
mov ah,02h
mov bh,00h
mov dh,22d
mov dl,34d
int 10h

mov ah,0ah
mov al," "
mov bh,00h
mov cx,01h
int 10h

mov ah,02h
mov bh,00h
mov dh,22d
mov dl,33d
int 10h
pop ax

mov dx,ax
mov ah,02h
int 21h

jmp retry

begin:

clear_screen 01d,01d,23d,78d

menu 08d,20d,hotkey
menu 10d,20d,hotkey1
menu 12d,20d,hotkey2
menu 14d,20d,hotkey4
menu 16d,20d,hotkey3

mov ah,07h
int 21h

clear_screen 01d,01d,23d,78d
Init_game 23d,01d,01h,dl,78d,nextsign5

mov ah,02h ;光标初始化
mov bh,00h
mov dh,01h
mov dl,01h
int 10h

mov cx,00h
lea si,letters
nextletter: ; 初始化屏幕上方的字母
mov ah,02h
mov dl,[si]
int 21h

inc si
inc cx
cmp cx,78d
je nextcycle
jmp nextletter

from_front: ; 相关循环的算法
sub present_position,78d
jmp gobackto_si

find_zero:cmp letter_counter,78d
je recycle

cmp present_position,78d
je from_one

mov ah,00h
nextsi: add present_position,01h
inc si
cmp [si],ah
je gobackto_di

cmp present_position,78d
je from_one

jmp nextsi

from_one:mov present_position,01h

jmp gobackto_si

recycle:mov letter_counter,00h
mov present_position,01d
lea si,position_flag
mov cx,00h

mov ah,00h
clearsi: mov [si],ah
inc cx
cmp cx,78d
je nextcycle
inc si
jmp clearsi

nextcycle:
lea di,letters
lea si,position_flag
add present_position,31d
cmp present_position,78
ja from_front

gobackto_si:
add si,word ptr present_position
dec si
mov ah,[si]
cmp ah,01h
je find_zero

gobackto_di:
mov ah,01h
mov [si],ah
add di,word ptr present_position
dec di
mov dl,present_position

mov ah,02h ; 字母下落的代码段部分
mov bh,00h
mov dh,01h
int 10h

mov cx,00h
nextrow:push cx ; 新的一行

mov cx,00h
out_cycle: ; 延迟
push cx
mov cx,00h
in_cycle:
add cx,01h
cmp cx,50000d
jne in_cycle

push dx
mov ah,06h
mov dl,0ffh
int 21h
pop dx

jz pass ; 如果键盘缓冲区部分为空,则跳转

cmp al,1bh ; 如果键入ESC，则返回主菜单
je to_start1

cmp al," " ;如果键入SPACE，则游戏暂停
je pause

cmp al,[di] ;输入字母正确！跳转!
je disappear

pass:
pop cx
inc cx