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There is a GEL file associated with your target configuration. The file is specifying what memory is present on your board and what its properties are. In this case you are trying to access 0x7910EA08 on the Data page. The memory map either doesn't have memory as being defined there or has it as non-readable.
You can view the memory map when you are in a debug session by going to the Tools menu and selecting Memory Map. This will open a new view. In the memory map section you should see tabs for the Program, Data and I/O pages.
Pointers are interpreted differently on the C28x and the CLA. The C28x treats them as 32-bit data types (address bus size being 22-bits wide can only fit into a 32-bit data type) while the CLA only has an address bus size of 16 bits.
