《計算機組成及彙編語言原理》學習第 13 天，p177-p177 總結，總計 1 頁。

一、技術總結

1.real mode

A programming model where the program has access to the entire capability of the machine, bypassing security and memory management. Useful primarily for operating systems and other supervisor-level programs(實模式是一種編程模型，其中程序可以繞過安全管理和內存管理去訪問機器的全部功能。實模式主要對操作系統和管理級程序有用)。

微軟的 DOS 系統運行在實模式下。

2.protected mode

A programming model where the capacity of the programs is typically limited by memory management and security issues; useful for user-level programs on a multiprocessing system(保護模式是一種編程模型，其中程序能力通常受內存管理和安全問題限制。保護模式對多進程系統上的用户級程序有用)。

微軟的 Windows 系統， Linux 系統運行在保護模式下。

二、英語總結(生詞：1)

1.interest

interest 除了有“興趣愛好”之意，也有另外一個意思：c/u. sth worth paying attention to or sth being significant(值得關注的xxx)。

p177, Two modes of particular interest are real mode, essentially a detailed recreation of the 8088 operating environment (one program running at a time, only 1 megabyte of memory available, and no memory protection), and protected mode, which incorporates the memory management system described later (section 8.4.1) with support for multitasking.

2.essentially

essentially 之前自己一直理解不到位，應理解為“adv. used to emphasize the basic nature(本質) of a person, thing, or situcation”

3.recreation

c. sth that has been made to be the same as sth that happended or existed in the past。

4.holdover

(1)holdover: hold("keep") + over("beyond")

c. sth kept beyond a designated time。

p177, Second, the complicated ones (from the programmer’s point of view) are, for the most part, holdovers from the old 8088 architecture.

三、其它

chapter 8 簡評：介紹 Pentium 電腦架構。

不熟悉的內容閲讀起來好慢，需要查資料的地方太多了。

四、參考資料

1. 編程

(1) Patrick Juola，《計算機組成及彙編語言原理》：https://book.douban.com/subject/3069889/

2. 英語

(1) Etymology Dictionary：https://www.etymonline.com

(2) Cambridge Dictionary：https://dictionary.cambridge.org

歡迎搜索及關注：編程人(a_codists)