《汇编语言程序设计课程设计》指导书

mov lea

extletter:

mov

cx, 78

si, letters ah, 02h

; 显示字母

mov dl, [si]

int 21h

inc si

loop nextletter

start_game:

mov ah, 2ch

int 21h ; inc dl ; cmp dl, 78 jna sg1 sub dl, 78 sg1:

mov present_position, dl

lea di, letters

add di, word ptr present_position ; dec di ; mov dl, present_position ; mov ah, 02h mov bh, 00h mov dh, 01h

int 10h ;

mov cx, 21d ; nextrow:

push cx

mov cx, speed ;

wait_for_key:

delay:

; 延迟

push cx

mov cx,1000

loop delay push dx mov mov

ah, 06h dl, 0ffh

8

; 从键盘输入字符

《汇编语言程序设计课程设计》指导书

int pop jz cmp je cmp jne

21h dx pass al, 1bh to_start al, \ pass0

; 暂停处理

; 如果键入SPACE,则游戏暂停

; 如果键入ESC,则返回主菜单

pause: push dx mov mov int pop cmp jne jmp

to_start:

jmp

pass0: cmp

pass:

down:

je

ah, 06h dl, 0ffh 21h dx

al, \ pause pass

; ;

start al,[di] disappear

; ;

; 输入字母正确！则字母消失

pop cx LOOP wait_for_key

mov mov mov mov int inc mov mov int

ah, 0ah al, \bh, 00h cx, 01h 10h dh

; 在当前光标位置写空格

; ;

; 改变光标位置

ah, 02h bh, 00h 10h

9

《汇编语言程序设计课程设计》指导书

mov mov mov mov int pop

ah, 0ah al, [di] bh, 00h cx, 01h 10h cx

; 在当前光标位置写字母

;

loop nextrow

ah, 0ah al, \bh, 00h cx, 01h 10h dh ah, 02h bh, 00h 10h ah, 0ah al, \ bh, 00h cx, 01h 10h

; 下一行 ;

letter_over: mov mov mov mov int

inc mov mov int

mov mov mov mov int

jmp

disappear: pop pop mov mov mov mov int

next_letter:

mov

mov

; ;

;

;

next_letter

; 击中字母后输出空格

cx cx

ah, 0ah al, \ bh, 00h cx, 01h 10h

; ;

;

ah, 02h bh, 00h

10

; ;

《汇编语言程序设计课程设计》指导书

mov mov int mov

dh, 01h

dl, present_position 10h al, [di]

; ;

; 出现下一个新字母的算法 ;

add al, 7 cmp al, 7ah

jna next_letter1 sub al, 26 next_letter1:

mov ah, 0ah

mov bh, 00h mov cx, 01h

int 10h

mov [di], al jmp start_game

main endp code ends end start

;

11