OSDev.org

The term System Memory Map means, for example, if the address bus is 32-bit, it means all the addresses the processor can handle are, for instance, 4 GB of addresses. Then the Memory Map comes in, which divides these addresses into ranges on the motherboard. So, the Memory Map is what allocates these addresses on the motherboard, and the motherboard manufacturers are the ones who do this. Is there anything wrong with what I’m saying because these terms are confusing me?

The memory map is just information. It tells you which component will respond to each address.

Do you know what an address decoder is?