鎿嶄綔绯荤粺璇惧悗浣滀笟浜?/p>
绗簲绔狅細璁惧绠＄悊
1
锛庤绠楁満绯荤粺涓?/p>
I/O
璁惧鏈夊摢浜涘垎绫绘柟寮忥紵
绛旓細鏈夌▼搴?/p>
I/O
锛堣疆璇級
銆佷腑鏂�?/p>
DMA
銆侀�氶亾銆傚墠涓夌鍦ㄥ井鏈轰腑寰堝父瑙併�?/p>
2
锛庢搷浣滅郴缁熻澶囩鐞嗙殑涓昏浠诲姟鏄粈涔堬紵
绛旓細
鎿嶄綔绯荤粺鏄敤浠ユ帶鍒跺拰绠＄悊璁＄畻鏈虹‖浠跺拰杞欢璧勬簮銆?/p>
鍚堢悊鍦扮粍缁囪绠楁満宸ヤ綔
娴佺▼浠ュ強鏂逛究鐢ㄦ埛浣跨敤璁＄畻鏈虹殑涓�缁勭▼搴忥紝
鎵�浠ユ搷浣滅郴缁熸槸涓�涓祫婧愮鐞嗗櫒锛?/p>
鍩?/p>
涓昏浠诲姟鏄鐞嗙郴缁熻祫婧愩�?/p>
3
锛庨�氶亾鍒嗕负鍑犵被锛熷悇鏈変粈涔堢壒鐐癸紵
绛旓細
鏍规嵁閫氶亾鐨勫伐浣滄柟寮忥紝閫氶亾鍒嗕负閫夋嫨閫氶亾銆佹暟鎹璺�氶亾銆佸瓧鑺傚璺�氶亾
3
绉嶇被鍨嬨�?/p>
锛?/p>
1
锛夐�夋嫨閫氶亾鍙堢О涓洪珮閫熼�氶亾锛屽湪鐗╃悊涓婂彲浠ヨ繛鎺ュ涓澶囷紝浣嗘煇娈垫椂闂村唴鍙厑璁镐竴涓
澶囧伐浣溿�?/p>
锛?/p>
2
锛?/p>
鏁扮粍澶氳矾閫氶亾鏄閫夋嫨閫氶亾鐨勬敼杩涖�?/p>
褰撴煇璁惧杩涜鏁版嵁浼犻�佹椂锛?/p>
閫氶亾鍙负璇ヨ澶囨湇鍔★紱
褰撹澶囧湪鎵ц瀵诲潃绛夋帶鍒舵搷浣滄椂锛?/p>
閫氶亾鍙互鏆傛椂鏂紑涓庤璁惧鐨勮繛鎺ワ紝
鍘绘墽琛屽叾浠栬澶囩殑閫?/p>
閬撶▼搴忋�?/p>
锛?/p>
3
锛?/p>
瀛楄妭澶氳矾閫氶亾涓庢暟缁勫璺�氶亾鐩哥被浼硷紝
鍙互鍦ㄤ竴涓椂闂存鍐呮墽琛屽涓澶囩殑閫氶亾绋嬪簭銆?/p>
浣嗕篃鏈変笉鍚岋細
瀛楄妭澶氳矾閫氶亾鍏佽澶氫釜璁惧鍚屾椂杩涜浼犺緭鎿嶄綔锛?/p>
鑰屾暟缁勫璺�氶亾鍒欎笉鍏佽锛?/p>
瀛?/p>
鑺傚璺�氶亾鐨勪紶杈撳崟浣嶆槸瀛楄妭锛屾暟缁勫璺�氶亾鐨勪紶杈撳崟浣嶆槸鏁版嵁鍧椼�?/p>
4
锛庣畝瑕佸彊杩板洓绉?/p>
I/O
鎺у埗鏂瑰紡鐨勫伐浣滆繃绋嬨�?/p>
绛旓細
锛?/p>
1
锛夌▼搴?/p>
I/O
鏂瑰紡
澶勭悊鏈哄
I/O
璁惧鐨勬帶鍒讹紝
閲囧彇绋嬪簭
I/O
锛?/p>
Programmed I/O
锛?/p>
鏂瑰紡鎴栫О涓哄繖涓�绛夊緟鏂瑰紡銆?/p>
鍗筹細
鈶犲湪澶勭悊鏈虹浉鎺у埗鍣ㄥ彂鍑轰竴鏉?/p>
I/O
鎸囦护鍚姩杈撳叆璁惧杈撳叆鏁版嵁鏃讹紝
瑕佸悓鏃舵妸鐘舵�佸瘎瀛樺櫒鐨勫繖
/
闂叉爣蹇?/p>
busy
缃负
1
锛岀劧鍚庝笉鏂湴寰幆娴嬭瘯
busy
锛?/p>
鈶″啀鍘诲惎鍔ㄨ涓嬩竴涓暟鎹紝骞剁疆
busy=1
銆?/p>
锛?/p>
2
锛変腑鏂┍鍔?/p>
I/O
鎺у埗鏂瑰紡
瀵?/p>
I/O
璁惧鐨勬帶鍒讹紝褰撴煇杩涚▼瑕佸惎鍔ㄦ煇涓?/p>
I/O
璁惧宸ヤ綔鏃讹紝渚跨敱
CPU
鍚戠浉搴旂殑璁惧鎺у埗鍣?/p>
鍙戝嚭涓�鏉?/p>
I/O
鍛戒护锛?/p>
鐒跺悗绔嬪嵆杩斿洖缁х画鎵ц鍘熸潵鐨勪换鍔°�?/p>
璁惧鎺у埗鍣ㄤ究鎸夌収璇ュ懡浠ょ殑瑕佹眰鍘?/p>
鎺у埗
I/O
璁惧銆?/p>
锛?/p>
3
锛夌洿鎺ュ瓨鍌ㄥ櫒璁块棶
DMA
鎺у埗鏂瑰紡
鈶?/p>
CPU
浠庣鐩樿鍏ヤ竴涓暟鎹潡鏃讹紝鍚戠鐩樻帶鍒跺櫒鍙戦�佷竴鏉¤鍛戒护銆傝鍛戒护琚�佸埌鍏朵腑鐨勫懡
浠ゅ瘎瀛樺櫒
CR
涓紱灏嗗彂閫佹暟鎹殑鍐呭瓨濮嬪潃鏀惧埌
MAR
涓紱瑕佽鐨勬暟鎹殑瀛楄妭鏁伴�佸叆
DC
涓紝
灏嗙鐩樹腑鐨勬簮鍦板潃閫佸埌
I/O
鎺у埗閫昏緫涓娿�?/p>