評論
打印
Okay, let's look at a sample problem.
好 讓我們看一個樣本問題
Suppose we're given a computer with a 16bit virtual address
假設(shè)我們有一臺計算機(jī) 16位虛擬地址系統(tǒng)
and a page size of 256 bytes.
頁面大小為256字節(jié)
The system uses onelevel page tables that start at address hex 400.
系統(tǒng)采用單層頁面表 起始地址為0x400
Maybe you want DMA on your 16bit system. Who knows?
也許這個系統(tǒng)有直接存儲器存取功能 隨便啦
The first few pages are reserved for hardware flags, etc.
前幾頁用于硬盤標(biāo)記儲存 等等
Assume pagetable entries have eight status bits.
假設(shè)一個頁面表共有八個狀態(tài)位
The eight status bits would then be...
這八個狀態(tài)位將會被...
Anybody?
有人知道嗎?
And I see we have our first surrender.
我看到了第一個逃兵
Don't worry, Mr. Zuckerberg.
別擔(dān)心 Zuckerberg先生
Brighter men than you have tried and failed this class.
比你聰明的人也在這門課上掛了
One valid bit, one modified bit, one reference bit and five permission bits.
一個有效位 一個修改位 一個參考位 五個許可位
That is correct.
他答對了
Does everybody see how he got there?
誰知道他怎么算的嗎?
Mark?
Mark?
You Mark Zuckerberg? Yeah.
你是Mark Zuckerberg嗎? 是啊
Cameron Winklevoss. Hi.
我是Cameron Winklevoss 嗨...
Tyler Winklevoss.
我是Tyler Winklevoss
Are you guys related?
你們兩個有親戚關(guān)系嗎?
That's good. Funny.
問的好 有趣
We never heard that before.
沒有人這樣問過我們
So, what can I do for you? Did I insult your girlfriends?
我要為你們做什么? 我侮辱你們的女友了嗎?
No. You didn't. Actually, I don't know.
不 沒有 說實(shí)話...我不知道
Yeah, we never asked. We should do that.
我們從來沒問過 也許我們該問問呢...
No.
沒有啦
We have an idea we want to talk to you about.
我們想找你談點(diǎn)事
You got a minute?
有空嗎?
You guys look like you spend some time at the gym.
你們貌似花了大功夫健身啊
We have to. Why?
我們不得不這么做 為什么?
We row crew.
我們要劃賽艇
Yeah, I've got a minute. Great.
好 我有空 太好了
