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<!DOCTYPE HTML PUBLIC "-//W3O//DTD W3 HTML 2.0//EN"><!-- This collection of hypertext pages is Copyright 1995-2005 by Steve Summit. --><!-- Content from the book "C Programming FAQs: Frequently Asked Questions" --><!-- (Addison-Wesley, 1995, ISBN 0-201-84519-9) is made available here by --><!-- permission of the author and the publisher as a service to the community. --><!-- It is intended to complement the use of the published text --><!-- and is protected by international copyright laws. --><!-- The on-line content may be accessed freely for personal use --><!-- but may not be published or retransmitted without explicit permission. --><!-- --><!-- this page built Sat Dec 24 21:47:47 2005 by faqproc version 2.7 --><!-- from source file miscbits.sgml dated Wed Dec 21 13:02:12 2005 --><!-- corresponding to FAQ list version 4.0 --><html><!-- Mirrored from c-faq.com/misc/sd28.html by HTTrack Website Copier/3.x [XR&CO'2008], Sat, 14 Mar 2009 08:02:52 GMT --><head><meta name=GENERATOR content="faqproc"><link href="http://www.eskimo.com/notfound.html" rev=subdocument><title></title></head><body bgcolor="#ffffff"> <a href="../index-2.html"><img src="../images/buttontop.gif" alt="top/contents"></a><a href="../search.html"><img src="../images/buttonsrch.gif" alt="search"></a><hr>[This self-explanatory example was sent to be by Bill Finke.]<br><br><pre>#define Ob(x) ((unsigned)Ob_(0 ## x ## uL))#define Ob_(x) (x & 1 | x >> 2 & 2 | x >> 4 & 4 | x >> 6 & 8 | \ x >> 8 & 16 | x >> 10 & 32 | x >> 12 & 64 | x >> 14 & 128)#define PORT_SYSCTLA 0x092 /* PS2 system control port A */#define SYSCTLA_DSK Ob(10000000) /* lights the fixed dsk activity led */#define SYSCTLA_DSK0 Ob(01000000) /* also lights fixed disk actvty led */#define SYSCTLA_TMOT Ob(00010000) /* watchdog timer has timed-out */#define SYSCTLA_LOCK Ob(00001000) /* CMOS password area is locked */#define SYSCTLA_A20 Ob(00000010) /* alternate address line 20 gating */#define SYSCTLA_RST Ob(00000001) /* alternate hot reset */</pre><hr><p><a href="base2.html" rev=subdocument>back</a></p><hr><p><a href="../questions.html"><img src="../images/buttontop.gif" alt="contents"></a><a href="../search.html"><img src="../images/buttonsrch.gif" alt="search"></a><br><a href="../about.html">about this FAQ list</a> <a href="../eskimo.html">about eskimo</a> <a href="../search.html">search</a> <a href="../feedback.html">feedback</a> <a href="copyright.html">copyright</a><p>Hosted by<a href="http://www.eskimo.com/"><img src="../../www.eskimo.com/img/link/eskitiny.gif" alt="Eskimo North"></a></p></body><!-- Mirrored from c-faq.com/misc/sd28.html by HTTrack Website Copier/3.x [XR&CO'2008], Sat, 14 Mar 2009 08:02:52 GMT --></html>⌨️ 快捷键说明
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