{"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":174,"pdf_page":190,"physical_index":190,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"62dba5ccf9b1ca4fe329318f65c8a08a84772ef41376ada04ba2051f3bbdbd69"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"通常(先不考虑上一章讲到的减法器)，8个A输入端和8个B输入端连接到开关上，CI（进位输入）接地，而8个S（计算和）输出以及CO（进位输出）端连接到灯泡上。\n\n经过改进，8位加法器的8个S输出端既与灯泡相连，又连接到8位锁存器的数据(D)输入端。标记为“保存”（Save）的开关是锁存器的时钟输入，用来存放加法器的运算结果。\n\n标识为2-1选择器的方块是让你用一个开关来选择加法器的 B端输入是取自第2排开关还是取自锁存器的Q端输出。当开关闭合时，就选择了用8位锁存器的输出作为B端输入。2-1选择器使用了8个如下所示的电路。\n\n编码隐匿在计算机软硬件背后的语言\n\n174","previous_page":173,"next_page":175}