具體要求：基于8086芯片實(shí)現(xiàn)。按鍵要求能夠?qū)崿F(xiàn)對(duì)二極管的點(diǎn)亮與熄滅的控制，用S1～S4組成的鍵盤(pán)分別控制4個(gè)發(fā)光二極管的點(diǎn)亮，S5按鍵來(lái)熄滅各二極管。按鍵具有防抖動(dòng)功能，例如：S1點(diǎn)亮1號(hào)燈，按S5可以將其熄滅。S2點(diǎn)亮2號(hào)燈，按S5可以將其熄滅。這是我網(wǎng)上找的其他魔改的，只能到這一步了，請(qǐng)各位大哥門(mén)請(qǐng)教指正一下看看圖，看看代碼能不能簡(jiǎn)化，小弟拜上。

CODE SEGMENT

ASSUME CS:CODE

IOCON   EQU 8006H

IOA     EQU 8000H

IOB     EQU 8002H

START:

MOV AL, 90H ;

MOV DX, IOCON ;

OUT DX, AL ;

MOV DX, IOA ;

MOV AL, 0FFH

OUT DX, AL

MOV AL, 0FFH ;

MOV DX, IOB

OUT DX, AL

MOV BL,0FFH

TIMER:

MOV DX, IOA ;

IN AL, DX ;

CALL DELAY_MS ;

IN AL, DX ;

CMP AL, 0FEH ;

JE LED0

CMP AL, 0FDH

JE LED1

CMP AL, 0FBH

JE LED2

CMP AL, 0F7H

JE LED3

CMP AL, 07FH

JE LED_OFF

JMP TIMER ;

LED0:

AND AL, BL

MOV DX, IOB

OUT DX, AL

MOV BL,AL

JMP TIMER

LED1:

AND AL, BL

MOV DX, IOB

OUT DX, AL

MOV BL,AL

JMP TIMER

LED2:

AND AL, BL

MOV DX, IOB

OUT DX, AL

MOV BL,AL

JMP TIMER

LED3:

AND AL, BL

MOV DX, IOB

OUT DX, AL

MOV BL,AL

JMP TIMER

LED_OFF:

MOV AL, 0FFH

MOV BL,0FFH

MOV DX, IOB

OUT DX, AL

JMP TIMER

DELAY_MS:

PUSH CX

MOV CX, 1000

JMP DELAY_LOOP

DELAY_LOOP:

DEC CX ;

JNZ DELAY_LOOP

POP CX

RET ;

CODE ENDS

END START