汇编ah=2输出字符

.model small
.stack 256      ;默认为1kb
.data
    bufx db 66
    bufy db 67
    bufz db ?
.code
.startup
    mov al,bufx
    mov bl,bufy
    cmp al,bl
    ja next
    mov bufz,bl
    jmp done
next:
    mov bufz,al
    jmp ans
done:
    jmp ans
ans:
    mov ah,2
    mov dl,bufz
    int 21h
    .exit 0
end

 

.model small
.code
mov ax,10
mov cx,ax
xor al,al
again:
    add al,7
    loop again
mov ah,2
mov dl,al
int 21h
.exit 0
end