Stievieb- thank you for trying the code on your systems.

I am using altera-ltsi 4.1.33 on an armv7l (32-bit) and perl 5.2.22.

I understand that the Perl code isn't doing the same thing as the C-code. My question really is whether there is something with my Perl build (or code) that would prevent me from accessing memory outside the system ram. Other processes can access that ram without an issue.

In reply to Re^6: Accessing Memory-mapped I/O by Anonymous Monk
in thread Accessing Memory-mapped I/O by Anonymous Monk

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