IO Control Mechanism (Hardware Data Access)

I want to do data setting to address, for example, put data of ‘C5’ to address of ‘64H’.
Qt does not provide this IO Control mechanism, so the third party library is essential.
How can I get IO Control mechanism (hardware data access)?
How can I touch with this kind of the third party?

Thank you for your help.

Rüd

Quote:

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Originally Posted by rud_1023

I want to do data setting to address, for example, put data of ‘C5’ to address of ‘64H’.

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What kind of address? You mean an IO port? Then you need to go through the driver interface present in the kernel. Qt is not really suited for writing device drivers, if you're making one.[/QUOTE]

And I doubt any 3rd party could be of any help. You should still go through the kernel interface.

Are we talking here about embedded device? Is there any operating system? Does this device have MMU?

PS. Please, don't ask the same question multiple times.