《微机原理与接口技术》实验指导书(9)

七、程序源代码清单：

CON8279 EQU 0492H

DAT8279 EQU 0490H ASSUME CS:CODE CODE SEGMENT PUBLIC ORG 100H

START: MOV DI,OFFSET SEGCOD

MOV AX,08H ;工作方式，16位，左入 MOV DX,CON8279 OUT DX,AX

START1: MOV CX,06 ;循环次数 MOV BX,80H DISP: MOV AX,BX

MOV DX,CON8279

OUT DX,AX ;写显示RAM命令，地址自增 MOV DX,DAT8279 MOV AX,CS:[DI]

OUT DX,AX ;写RAM0 NOP NOP

INC DI

MOV AL,CS:[DI] CMP AL,0FFH

JNZ FLASH

MOV DI,OFFSET SEGCOD FLASH: PUSH CX

CALL DELAY ；延时

;call black ；全灭 CALL DELAY ；延时 POP CX INC BX LOOP DISP

CALL BLACK JMP START1 BLACK:

MOV DX,CON8279 MOV AX,0D1H

OUT DX,AX ;all clear and delay CALL DELAY RET DELAY:

MOV CX,8FFFH ;time delay DELAY1:

NOP NOP

LOOP DELAY1 RET

SEGCOD DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H

DB 7FH,6FH,77H,7CH,39H,5EH,79H,71H,0FFH CODE ENDS

END START ；全灭