【計概】CPU欲將資料寫入I/O需經過Memory嗎? - 考試
By Leila
at 2015-08-20T20:52
at 2015-08-20T20:52
Table of Contents
http://i.imgur.com/RTYNfQ2.jpg
上圖為interrupt io的範例,要從I/O讀取資料時需先將data寫入buffer register,再將d
ata由buffer register寫入memory中。
反過來的話,若要將data寫回I/O,是否也需經由memory呢?
還是直接將資料寫回buffer register?
因為I/O定址模式已有對buffer registet直接定址了,所以可直接寫回?
謝謝
Sorry 又忘記分類
--
Sent from my Android
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上圖為interrupt io的範例,要從I/O讀取資料時需先將data寫入buffer register,再將d
ata由buffer register寫入memory中。
反過來的話,若要將data寫回I/O,是否也需經由memory呢?
還是直接將資料寫回buffer register?
因為I/O定址模式已有對buffer registet直接定址了,所以可直接寫回?
謝謝
Sorry 又忘記分類
--
Sent from my Android
--
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考試
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