音樂(lè)點(diǎn)播系統(tǒng)畢業(yè)設(shè)計(jì)


本文共計(jì)14頁(yè)，2060余字；


1摘要
這個(gè)程序利用計(jì)算機(jī)發(fā)生原理,編寫(xiě)的樂(lè)曲的程序. 樂(lè)曲是按照一定的高

低、長(zhǎng)短和強(qiáng)弱關(guān)系組成的音調(diào)。在一首樂(lè)曲中，每個(gè)音符的音高、音長(zhǎng)與頻

率有關(guān)和節(jié)拍有關(guān),音符和頻率也形成一種對(duì)應(yīng)關(guān)系. 這些都是通過(guò)BIOS中的

BEEP子程序來(lái)實(shí)現(xiàn)的。BEEP子程序能根據(jù)BX中給出的計(jì)數(shù)值控制8253/54

定時(shí)器，產(chǎn)生的頻率為896 Hz的聲音。BX中的計(jì)數(shù)值由ERROR_BEEP子程

序設(shè)置為533H，然后BEEP程序又將8225的輸出寄存器（I/O端的61H）的

PB0和PB1置1，使揚(yáng)聲器接通并發(fā)出音頻為896 Hz的聲音。

Abstract：Make use of the language tool masm 5.0 that edit
collected materials the music edit and translate to order to sow the system, using the loudspeaker that it control calculator gives musical performance the melody.Melody is according to certainly high and low, length with strong or weak the tone that relation constitute.In a melody, the sound of each note is high, the sound is long to have something to do with frequency to have relation with rhythm, these are all to passes the sub- procedure of BEEP in the BIOS to realize of.The sub- procedure of BEEP can according to give in the BX of count the value control 8253/54 settle machine, the output frequency is the voice of the 896 Hzs. The BX inside counts the value establisheses to 533 Hs from the sub- procedure of ERROR_BEEP, then the procedure of BEEP again will 8225 of the exportation deposits the PB0 of the machine( the 61 Hs that I/ O carry) to place with the PB1 1, make the loudspeaker connect the to erupt sound of requency as the voice of the 896 Hzs.
目 錄

１、摘要………………………………………………………… 1
２、設(shè)計(jì)內(nèi)容…………………………………………………… 3
2.1題目意義………………………………………………… 4
2.2功能……………………………………………………… 4
2.3軟件運(yùn)行環(huán)境…………………………………………… 4
2.4程序說(shuō)明………………………………………………… 4
2.5程序流程圖……………………………………………… 7
３、總結(jié)………………………………………………………… 8
3.1關(guān)鍵字………………………………………… 8
3.2設(shè)計(jì)中遇到的問(wèn)題及解決方法………………………… 8
3.3設(shè)計(jì)體會(huì)………………………………………………… 8
４、程序源代碼…………………………………………………9
５、參考文獻(xiàn)……………………………………………………13
5參考文獻(xiàn)

IBM PC匯編語(yǔ)言程序設(shè)計(jì) （第二版） 沈美明 清華大學(xué)出版社
IBM PC匯編語(yǔ)言程序設(shè)計(jì) 實(shí)驗(yàn)教程 沈美明 溫冬嬋 張赤紅