Question

汇编语言程序设计：在屏幕上显示26个英文字母A~Z。

Answer 1

;BIOS调用实现

CODE SEGMENT
ASSUME CS:CODE
START:
MOV CX,26
MOV AX,0E41H;功能号e->AH,字符ASCII码->AL
LOP1:
INT 10H
INC AL
LOOP LOP1
MOV AH,4CH
INT 21H
CODE ENDS
END START

Answer 2

        CODE  SEGMENT
              ASSUME    CS:CODE
              ORG       100H
      START:
              MOV       CX,26
              MOV       DL,'A'
              MOV       AH,2
         @0:
              INT       21H
              INC       DL
              LOOP      @0
              MOV       AH,4CH
              INT       21H
        CODE  ENDS
              END       START

Answer 3

CODE SEGMENT
ASSUME CS:CODE
START: MOV CL,26
MOV DL,'A'
LOP1: MOV AH,2
INT 21H
INC DL
LOOP LOP1
MOV AH,4CH
INT 21H
CODE ENDS
END START

Answer 4

书上例题 应该自己看
dos调用那章