{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","id":"38270854-596f-4a26-8183-db8c968c6020","uuid":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","normalized_title":"编码隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","isbns":["9787121181184","0123456789","6044921875","3039331000","0000000000","0000000000000"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":438,"navigation_url":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020","title_url":"https://workshop.closeclaw.top/ai/title/%E7%BC%96%E7%A0%81%20%E9%9A%90%E5%8C%BF%E5%9C%A8%E8%AE%A1%E7%AE%97%E6%9C%BA%E8%BD%AF%E7%A1%AC%E4%BB%B6%E8%83%8C%E5%90%8E%E7%9A%84%E8%AF%AD%E8%A8%80","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/38270854-596f-4a26-8183-db8c968c6020","page_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/page","search_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/search"},"page":{"printed_page":311,"pdf_page":327,"physical_index":327,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"df5074f4af2c17d444833be926799ad3e0a0e21018e95f654d0d4dc2dddd2308"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"其实在ITU规范化的编码方案中，05h、0Bh和16h是留做他用的，官方说法为“国内使用”。表中列出的是这几个编码在美国使用时的含义。某些欧洲国家将这些编码代表重音符号。响铃编码令电传打字机发出清脆的铃声。“WhoAreYou”编码用来让打字员激活身份识别机制。\n\n像莫尔斯码一样，这种5位的编码并没有提供区分大、小写的方法。下面这个句子：\n\n$$\nI S P E N T S 2 5 T O D A Y .\n$$\n\n表示成编码的十六进制数据流就是：\n\n$$\n\\mathrm { O C ~ O 4 ~ 1 4 ~ O D ~ 1 0 ~ O 6 ~ O 1 ~ O 4 ~ 1 8 ~ 1 6 ~ 1 9 ~ 0 1 ~ 1 F ~ 0 4 ~ O 1 ~ O 3 ~ 1 2 ~ 1 8 ~ 1 5 ~ 1 8 ~ O 7 ~ 0 2 ~ 0 8 ~ }\n$$\n\n请注意三个转义码的使用：1Bh出现在数字之前，1Fh出现在数字之后，而数字结束之后又出现了1Bh。这一行编码以回车、换行符结尾。\n\n问题出来了，如果把相同的数据流再一次输入到电传打印机，情况就大不一样了，\n\n20 ASCII 码和字符转换\n\n311","previous_page":310,"next_page":312}