微机原理课设字幕机代码.doc

PUBLIC L_CON ;定义公共变量 M8255_A EQU 0640H ;定义8255A口、B口、C口和控制口地址 M8255_B EQU 0642H M8255_C EQU 0644H M8255_CON EQU 0646H SSTACK SEGMENT STACK ;定义堆栈段 DW 32 DUP(?) ;定义一个32位的字型存储空间 SSTACK ENDS DATA SEGMENT TAB1 DB 4fH,00H,00H,00H,00H,00H,00H,00H ;组成“中华”二字的 TAB2 DB 48H, 4fH,00H,00H,00H,00H,00H,00H 数字代码 TAB3 DB 7eH, 48H,4fH,00H,00H,00H,00H,00H TAB4 DB 0feH, 7eH,48H,4fH,00H,00H,00H,00H TAB5 DB 7eH,0feH,7eH,48H,4fH,00H,00H,00H TAB6 DB 49H,7eH,0feH,7eH,48H,4fH,00H,00H TAB7 DB 4fH,49H,7eH,0feH,7eH,48H,4fH,00H TAB8 DB 00H,4fH,49H,7eH,0feH,7eH,48H,4fH TAB9 DB 48H,00H,4fH,49H,7eH,0feH,7eH,48H TAB10 DB 2AH,48H,00H,4fH,49H,7eH,0feH,7eH TAB11 DB 1CH,2AH,48H,00H,4fH,49H,7eH,0feH TAB12 DB 78H,1CH,2AH,48H,00H,4fH,49H,7eH TAB13 DB 1CH,78H,1CH,2AH,48H,00H,4fH,49H TAB14 DB 2AH,1CH,78H,1CH,2AH,48H,00H,4fH TAB15 DB 48H,2AH,1CH,78H,1CH,2AH,48H,00H L_CON DB ? DATA ENDS CODE SEGMENT ASSUME CS:CODE, DS:DATA START: MOV AX, DATA ;初始化语句 MOV DS, AX MOV L_CON, 7FH MOV DX, M8255_CON MOV AL, 80H ;写8255控制字 OUT DX, AL AA0: MOV BL, 0D0H ;定义外循环次数 AA1: MOV SI, OFFSET TAB1 ; 循环显示第一个图形 MOV CX, 0008H ;定义内循环次数8次 DIS1: MOV DX, M8255_A MOV AL, L_CON OUT DX, AL MOV DX, M8255_B MOV AL, [SI] OUT DX, AL ROR L_CON, 1 ;列右移一位 INC SI ;行自动加1 CALL DELAY ;调用延时子程序 LOOP DIS1 DEC BL CMP BL, 00H JNE AA1 MOV BL, 0D0H AA2: MOV SI, OFFSET TAB2 ; 循环显示第二个图形； MOV CX, 0008H DIS2: MOV DX, M8255_A MOV AL, L_CON OUT DX, AL MOV DX, M8255_B MOV AL, [SI] OUT DX, AL ROR L_CON, 1 INC SI CALL DELAY LOOP DIS2 DEC BL CMP BL, 00H JNE AA2 MOV BL, 0D0H AA3: MOV SI, OFFSET TAB3 ;循环显示第三个图形 MOV CX, 0008H DIS3: MOV DX, M8255_A MOV AL, L_CON OUT DX, AL MOV DX, M8255_B MOV AL, [SI] OUT DX, AL