{"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":270,"pdf_page":286,"physical_index":286,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"c205dda003216c87234043c5821a124e0bfb3467653b3f205bb262fd5726b510"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"然而，纳秒使计算机成为可能。正如在第17章中看到的，计算机处理器迟钝地做着简单的事情一从存储器中取出一个字节放到寄存器中，再将两个字节相加，然后将结果存放回存储器。迅速地完成这些操作是计算机（并非第17章中的计算机，而是当今使用的计算机）能完成任何实际工作的唯一原因。诺依斯说过：“当更好地认识了纳秒后，从概念上来讲计算机操作是相当简单的”。\n\n继续阅读《TTL数据手册》会发现书中很多熟悉的小条目。7402芯片有4个双输入或非门，7404芯片有6个反相器，7408芯片有4个双输入与门，7432芯片有4个双输入或门，以及7430芯片有一个8输入与非门，如下图所示。\n\n缩写 Nc 表示无连接（no connection)。\n\n7474芯片是另一个较为熟悉的芯片。它是一个“带预置和清零的双D型正边沿触发器”，如下图所示。\n\n编码—隐匿在计算机软硬件背后的语言\n\n270","previous_page":269,"next_page":271}