{"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":310,"pdf_page":326,"physical_index":326,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"994c2fdd2b4195f962bdab3279db8ea32ba57224a0fdde3bf4b0a19a5e4cf59b"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"触发电磁铁，从而将字符打印在纸上。\n\n由于Baudot对每个字符采用5位编码，整个系统由32个编码所组成，这些编码的十六进制取值范围从00h到1Fh。下表给出了32个不同编码的十六进制形式及其所对应的字母表中的字符。\n\n编码00h被保留了下来，没有指派给任何值。剩下的31个编码中，字母表中的字符占了26个，其余5个用来调整格式，如上表中的楷体排版的语句所示。\n\n编码04h用来表示空格，通常用于分隔单词。编码02h和08h表示的是回车和换行。这些都是电传打字机中的专用术语。当使用电传打字机上打字，一旦到了一行的末尾时，我们通常会按下一个操作杆或按钮。这个操作其实包括两个动作：第一个动作是，使打印机的滑架回到起始位置，这样打印下一行时可以从纸的最左边开始，这就是回车。第二个动作是，将打印机的滑架移至正在使用中的位置的下一行，这就是换行。在Baudot编码系统中，这两个编码由专门的按键产生。Baudot电传打字机在打印的时候会响应这两个编码以完成相应的操作。\n\nBaudot系统里怎么没有数字和标点符号呢？其实这是因为编码1Bh中暗藏玄机，它的实际作用是数字转义（Figure Shift)。数字转义编码后的所有的编码都会被解释为数字或标点符号，直到遇到字符转义编码（1Fh)，一切就又被解释为字符。下表展示了十六进制编码以及所对应的数字和标点符号。\n\n编码—隐匿在计算机软硬件背后的语言\n\n310","previous_page":309,"next_page":311}