da2.asm

汇编相关。D/A转换和A/D转换

DA0832  EQU  9C00H

CODE SEGMENT
	ASSUME CS:CODE

START:	MOV AL,00H
        MOV DX,DA0832
	OUT DX,AL
        CALL DALLY
        MOV AL,7FH
        MOV DX,DA0832
        OUT DX,AL
        CALL DALLY
        CALL BREAK
        JMP START

DALLY:	PUSH CX
	PUSH AX
        MOV CX,0050H
A3:     MOV AX,5000H
A4:	DEC AX
	JNZ A4
	LOOP A3
	POP AX
	POP CX
	RET

BREAK  PROC  NEAR 
        MOV AH,06H
        MOV DL,0FFH
        INT 21H
        JE  RETURN
        MOV AX,4C00H
        INT 21H
RETURN:RET
BREAK  ENDP

CODE ENDS
     END START