Using assembly language, how can I switch on and off the Caps Lock LED, with开发者_JAVA技巧 its functionality?
I mean when it is off and on.
In DOS and versions of Windows that support FULL DOS functionality, you can twiddle the bits in the memory location and it will not only switch the state, but will also flip the LED (assuming AT style and newer keyboards).
Reference for more details on the location(s): http://mcs.uwsuper.edu/sb/324/Intro/memory.html
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是否在对方手机上显示已读，是由用户自行设置的。依次打开iPhone的“设置-信息”，会有一个“发送已读回执”的选项。将其打开，对方就能看到你，是否已经阅读了本条iMessage信息。将其关闭，对方就看不到。
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