19 lines
884 B
Text
19 lines
884 B
Text
{{basic data operation}}
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In systems programing it is sometimes required to place language objects at specific memory locations, like I/O registers, hardware interrupt vectors etc.
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;Task:
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Show how language objects can be allocated at a specific machine addresses.
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Since most [[OS]]es prohibit access to the physical memory if it is not mapped by the application, as an example, rather than a physical address, take the address of some existing object (using suitable [[Address Operations|address operations]] if necessary).
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For example:
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::* create an integer object
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::* print the machine address of the object
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::* take the address of the object and create another integer object at this address
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::* print the value of this object to verify that it is same as one of the origin
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::* change the value of the origin and verify it again
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<br><br>
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