{"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":356,"pdf_page":372,"physical_index":372,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"29697b9ebe88d76066bf80bd8740698b5bcba8318ed0a5c750b72437de76f464"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"也可以用如下的形式来表示包含这三个数的ASCI文本文件：\n\n$$\n\\texttt { 3 2 } 3 3 3 1 3 1 3 2 0 0 0 0 \\texttt { 3 3 } 3 0 3 9 3 3 1 0 0 0 \\texttt { 3 6 } 3 2 \\texttt { 3 7 } 3 3 3 6 0 0 \\texttt { 0 }\n$$\n\n这是用十进制数的ASCI码形式来表示上述三个数，这两种表示形式是等价的，如下所示：\n\n23112   \n30911   \n62736\n\n显然，文本文件更易于人们阅读，同样，与十六进制相比，十进制更符合人们的习惯，没理由使用十六进制而拒绝十进制。\n\n前面曾提到过，磁盘最开始的两个磁道存储CP/M系统本身，而CP/M在磁盘上是无法运行的，必须将其加载到内存里。只读存储器（ROM）在CP/M计算机中使用得并不多，只需要用它来存放一小段称为引导程序（bootstraploader，操作系统的其余部分可以通这段代码的自举操作被高效地引导）的代码即可。开机启动时，磁盘上最开始的128字节的扇区内容，会首先由引导程序加载到内存并运行，这个扇区包含有特定的代码，可以把CP/M中的其余部分加载到内存中，整个过程称为操作系统的引导（booting)。\n\n操作系统的引导过程完成后，随机存储器（RAM）的最高地址区域用来存放CP/M，加载完CP/M后，整个内存空间的组织结构如下所示。\n\n编码—隐匿在计算机软硬件背后的语言\n\n356","previous_page":355,"next_page":357}