【汇编】课本第三章例题

课本第三章例题

例3-1

;p31,例3.1

DATA SEGMENT
;
DATA ENDS

CODE SEGMENT
	ASSUME CS:CODE
 START:	
	MOV AX,DATA
	MOV DS,AX

	MOV AH,1
	INT 21H
	MOV DL,AL
	ADD DL,1
	MOV AH,2
	INT 21H

	MOV AH,4CH
	INT 21H
CODE ENDS
 END START

例3.2

;p32,例3.2

DATA SEGMENT
	STRING DB 'HELLO,WORLD!$'
DATA ENDS

CODE SEGMENT
	ASSUME CS:CODE,DS:DATA
 START:	
	MOV AX,DATA
	MOV DS,AX

	MOV DX,OFFSET STRING        ;= lea dx,string
	MOV AH,9
	INT 21H

	MOV AH,4CH
	INT 21H
CODE ENDS
 END START

例3.3

;p43,例3.3

DATA SEGMENT
	BUF DB 9
	REAL DB ?
	STR DB 9 DUP(?)
DATA ENDS

CODE SEGMENT
	ASSUME CS:CODE,DS:DATA
 START:	
	MOV AX,DATA
	MOV DS,AX

;	LEA DX,BUF
	MOV DX,OFFSET BUF
	MOV AH,0AH
	INT 21H

	MOV AH,4CH
	INT 21H
CODE ENDS
 END START