微機(jī)原理與接口技術(shù)課程設(shè)計--簡易電子琴設(shè)計(編輯修改稿)
2025-07-03 19:29 本頁面
【文章內(nèi)容簡介】 E1 。發(fā)音1 CALL FY CALL DELAY JMP A0 F2: MOV BX, OFFSET TABLE1 。發(fā)音2 INC BX CALL FY CALL DELAY JMP A0 F3: MOV BX, OFFSET TABLE1 。發(fā)音3 ADD BX,2 CALL FY CALL DELAY JMP A0 F4: MOV BX, OFFSET TABLE1 。發(fā)音4 ADD BX,3 CALL FY CALL DELAY JMP A0 F5: MOV BX, OFFSET TABLE1 。發(fā)音5 ADD BX,4 CALL FY CALL DELAY JMP A0 F6: MOV BX, OFFSET TABLE1 。發(fā)音6 ADD BX,5 CALL FY CALL DELAY JMP A0 F7: MOV BX, OFFSET TABLE1 。發(fā)音7 ADD BX,6 CALL FY CALL DELAY JMP A0 FY PROC 。發(fā)音子程序 A7: MOV AL, 0B6H 。8253初始化 OUT 43H, AL MOV AL, [BX] MOV AH, 00H MOV DL, 25H MUL DL OUT 42H, AL MOV AL, AH OUT 42H, AL RET FY ENDP DELAY PROC 。延時子程序 PUSH CX PUSH AX MOV CX,0040H A5: MOV AX,056CH A6: DEC AX JNZ A6 LOOP A5 POP AX POP CX MOV AL,0BAH 。改變8253的控制字1011 1010,工作于方式5 MOV DX,43H OUT DX,AL RET DELAY ENDP CODE ENDS END START 自動播放預(yù)存琴譜功能程序設(shè)計 DATA SEGMENT TABLE2 DB 4DH,4DH,33H,33H,2DH,2DH,33H,01H DB 39H,39H,3DH,3DH,45H,45H,4DH,01H DB 33H,33H,39H,39H,3DH,3DH,45H,01H DB 33H,33H,39H,39H,3DH,3DH,45H,01H DATA ENDS STACK SEGMENT STACK DW 64 DUP(?) STACK ENDS CODE SEGMENT ASSUME CS:CODE,DS:STACK START: MOV AX, DATA MOV DS, AX MOV AL,82H 。8255初始化 OUT 63H,AL CMP AL,01H 。擴(kuò)展功能 JZ F0 F0: MOV BX, OFFSET TABLE2 JZ A1 A1: IN AL,61H CMP AL,01H JNZ A4 CALL FY
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