編制顯示四位和兩位十六進位制數

1、顯示四位0A49H十六進位制數

DATA SEGMENT
	DATA1 DW 0A490H
DATA ENDS
CODE SEGMENT
	ASSUME CS:CODE,DS:DATA
START:
	MOV AX,DATA
	MOV DS,AX
	MOV AX,DATA1
	CALL DISP4
	INT 20H
DISP4 PROC NEAR
	PUSH BX
	PUSH CX
	PUSH DX
	PUSH AX
	MOV AL,AH
	CALL DISP2
	POP AX
	CALL DISP2
	POP DX
	POP CX
	POP BX
	RET
DISP4 ENDP
DISP2 PROC NEAR
	MOV BL,AL
	MOV DL,AL
	MOV CL,4
	ROL DL,CL
	AND DL,0FH
	CALL DISP1
	MOV DL,BL
	AND DL,0FH
	CALL DISP1
	RET
DISP2 ENDP
DISP1 PROC
	OR DL,30H
	CMP DL,3AH
	JB DDD
	ADD DL,07H
DDD:
	MOV AH,2
	INT 21H
	RET
DISP1 ENDP
CODE ENDS
	END START

2、顯示兩位0A4H十六進位制數

DATA SEGMENT
	DATA1 DB 0A4H
DATA ENDS
CODE SEGMENT
	ASSUME CS:CODE,DS:DATA
START:
	MOV AX,DATA
	MOV DS,AX
	MOV AX,DATA1
	CALL DISP2
	INT 20H
DISP2 PROC NEAR
	MOV BL,AL
	MOV DL,AL
	MOV CL,4
	ROL DL,CL
	AND DL,0FH
	CALL DISP1
	MOV DL,BL
	AND DL,0FH
	CALL DISP1
	RET
DISP2 ENDP
DISP1 PROC
	OR DL,30H
	CMP DL,3AH
	JB DDD
	ADD DL,07H
DDD:
	MOV AH,2
	INT 21H
	RET
DISP1 ENDP
CODE ENDS
	END START