Can I read Real vs Protected Mode in x86 CPUs on EtoBox?

Real vs Protected Mode in x86 CPUs by Saqib Rao is a document available to read on EtoBox.

What is Real vs Protected Mode in x86 CPUs about?

Real mode is an operating mode of x86 CPUs characterized by a 1MiB segmented address space with direct access to memory and I/O. It provides no memory protection, multitasking, or privilege levels. All x86 CPUs start in real mode. Protected mode restricts programs to a 640KiB contiguous address space, ensuring data is not overwritten. It provides memory protection and is used by operating systems and applications, while real mode is for backward compatibility.

Author

Saqib Rao

Language

EN