{"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":138,"pdf_page":154,"physical_index":154,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"ba1a459b6dfe0f4a37bad3643da2a963efc7095832bc18fac8d2cd79fdeadcbf"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"8位二进制数的相加结果可能是一个9位的二进制数。\n\n加法器的其他部分是以各种形式连接起来的逻辑门。开关将触发逻辑门中的继电器来点亮相应的灯泡。例如，如果我们要将0110-0101和1011-0110（之前例子中的两个数）相加，则要将相应的开关置于下图所示位置。\n\n灯泡发光显示结果为：1-0001-1011（然而，这只是一个希望的结果，因为我们还没有将加法器真正搭建出来！)\n\n在上一章中提到过，本书中我们将会用到许多继电器。这个8位二进制加法器中所用到的继电器不少于144个，其中我们用来相加的8对二进制位，每对都需要18个继电器。如果将全部电路展示出来，你一定会崩溃的。没有人能看懂以各种方式连接起来的144个继电器所表达的意义。相反地，我们要利用逻辑门来分阶段地处理这个问题。当看到进位（两个1相加就会产生一个进位）结果表的时候，或许你已经看出来逻辑门和二进制加法的一些相关性了。\n\n你可能意识到了，这和上一章中与门的输出结果是一样的。\n\n因此，利用与门可以计算两个二进制数加法的进位。\n\n到此，我们着实取得了一些进展。下面我们要做的就是利用继电器来实现下表。\n\n编码——隐匿在计算机软硬件背后的语言\n\n138","previous_page":137,"next_page":139}