sample.asm

汇编MASM5提供范例 用CMD进行操作 汇编的工具

; An asm sample for the student
;  YQS  2006.3

STACK   SEGMENT   STACK
        DW  100  DUP(?)
STACK   ENDS
DATA    SEGMENT
        BUFF  DW  3C6DH
DATA    ENDS
CODE    SEGMENT
        ASSUME  CS:CODE,DS:DATA,SS:STACK
START:  MOV  AX,DATA
        MOV  DS,AX
        LEA  SI,BUFF
        MOV  BX,[SI]
        MOV  CH,4
A1:     MOV  CL,4
        ROL  BX,CL
        MOV  AL,BL
        AND  AL,0FH
        ADD  AL,30H
        CMP  AL,3AH
        JL   A2
        ADD  AL,7H
A2:     MOV  DL,AL
        MOV  AH,2
        INT  21H
        DEC  CH
        JNZ  A1
        MOV  AH,4CH
        INT  21H
CODE    ENDS
        END  START