如何用汇编实现ASCII码输出？

Question

输入一个字符，输出其ASCII码，求助各位计算机大侠。。

Answer 1

code segment public
assume cs:code,ds:code
jmp start
msg db ’This program can show you the ASCII of characters or key combinations’,0dh,0ah
db ’ I hope it would help you’,0dh,0ah
db ’ press ESC(ASCII 1bh) to exit!~~’,0dh,0ah
db ’ kinglin 03.11.27’,0dh,0ah
db 0dh,0ah,24h
save db ?
start:
mov ax,cs
mov ds,ax
lea dx,msg
mov ah,09h
int 21h
loop1:
mov ah,07h ;input character
int 21h
mov save,al
cmp save,01bh ;is ESC??
jz done ;yes,jmp done
cmp save,00h ;is key combination?
jnz show ;no,jmp
mov ah,07h
int 21h
mov save,al
show:
mov bl,save ;save al
mov cl,04h ;get high 4 bit
shr bl,cl
cmp bl,09h ;is greater than 09h?
jbe changdec ;below or equal,then jmp
add bl,07h ;greater then add 07h
changdec:
add bl,30h ;show
mov dl,bl
mov ah,02h
int 21h
mov al,save
and al,0fh ;get low 4 bit
cmp al,09h
jbe chdec
add al,07h
chdec:
add al,30h
mov dl,al
mov ah,02h
int 21h mov dl,’ ’
mov ah,02h
int 21h
loop loop1
done:
mov ah,4ch
int 21h
code ends
end start本回答被提问者采纳