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The article talks about how the processor can reference (or address) the memory. In all modern architectures memory is byte-addressable, which means that every byte-sized memory cell has a number (its address), which the CPU uses to identify that cell.
3 Αυγ 2022 · The electronics have unused values in counting through bits and bytes. If memory fetches are 32 bits, then 40-bit pointers always require two fetches; if memory fetches are 40 bits, then some of your 16-bit and 32-bit fetches require two fetch operations, and some of your 64-bit fetches need three.
28 Μαρ 2010 · In a 64bit processor, the processor can (in theory) use 64 bits to address memory, or 2^64 bytes of addressable memory. I believe that amounts to 16 Exo Bytes, which is a huge amount that is almost to the point of counting the amount of molecules in your machine.
28 Σεπ 2022 · A 32-bit process is still limited to the same constraints in a 64-bit OS. The issue is that memory pointers are only 32-bits wide, so the program can't assign/resolve any memory address larger than 32 bits.
20 Ιουλ 2022 · The x64 architecture can utilize a total of 2^64 bytes, equaling to 16 billion gigabytes (16 exabytes) of memory. The much greater resource utilization makes it suitable for powering supercomputers and machines that need access to vast resources.
11 Ιαν 2022 · A driver is a program that enables software to communicate with another software or hardware. Although VFS is responsible for providing a standard interface between programs and various file systems, computer programs don't interact with VFS directly.
Unless computers start using some break-through technologies which do not exist yet even in laboratories, having more than 2 64 addressable space is just not physically possible with current silicon technology.
