求助 帮忙看看哪错了啊
data segmentbuffer db 200 dup(?)
db1 db 1
db2 db 0
db3 db 00h
msg1 db 'THE TABLE: THE DRAWING AREA:(press "esc" key to exit)','$'
data ends
program segment
main proc far
assume cs:program,ds:data
start:
push ds
sub ax,ax
push ax
mov ax,data
mov ds,ax
mov ah,09
lea dx,msg1 ；显示信息
int 21h
mov bx,26
mov db1,0 ;显示分界线
mov db2,36
op:
mov ah,2
mov bh,0
mov dh,db1 ；初始化光标
mov dl,db2
int 10h
mov bh,0
mov cx,1
mov al,2ah
mov ah,0ah
int 10h
inc db1
dec bx
jnz op
mov db1,1
mov db2,0
mov si,0
op1: ；制作图形元素表
mov ah,2
mov bh,0
mov dh,db1 ；定位光标
mov dl,db2
int 10h
mov al,db3
mov buffer[si],al ；显示数字并存入ASCII码
push si
add si,30h
mov bh,0
mov ax,si
and ax,00ffh
mov cx,1
mov ah,0ah
int 10h
inc db2
cmp db2,39 ；判断是否过界
jna op2
inc db1
mov db2,0
op2: mov ah,2
mov bh,0
mov dh,db1 ；重定位光标
mov dl,db2
int 10h
mov ah,0ah
mov bh,0 ；显示字符
mov al,db3
mov cx,1
int 10h
pop si
inc si
inc db3
cmp db3,09h
ja over
add db2,7
cmp db2,39 ；判断是否过界
jna op1
inc db1
mov db2,0
jmp op1
over:
mov db1,1
mov db2,38
mov ah,2
mov bh,0
mov dh,1
mov dl,38 ;初始化光标
int 10h
opp0:
mov ah,0
int 16h ;判断输入键
cmp ah,48h ；方向键
je up
cmp ah,50h
je down
cmp ah,4dh
je right
cmp ah,4bh
je left
cmp ah,01h ；ESC键
jnz rr
ret
rr: cmp al,30h ；数字键
jnb opp2
jmp opp0
opp2:
cmp al,39h
ja opp0
and ax,00ffh
sub ax,30h
mov si,ax
mov al,buffer[si] ；显示相应字符
mov bh,0
mov cx,1
mov ah,0ah
int 10h
jmp opp0
up:
dec db1
jz edg_up
jmp opp1 ;定界线
edg_up:
mov db1,1
jmp opp1
down:
inc db1
cmp db1,24
ja edg_down
jmp opp1
edg_down:
mov db1,24
jmp opp1
right:
inc db2
cmp db2,78
ja edg_right
jmp opp1
edg_right:
mov db2,78
jmp opp1
left:
dec db2
cmp db2,38
jb edg_left
jmp opp1
edg_left:
mov db2,38
opp1:
mov ah,2
mov bh,0 ；重定位光标
mov dh,db1
mov dl,db2
int 10h
jmp opp0
exit:
ret ；返回DOS
main endp
program ends
end start
