This: >If we divide this by 1024 (because we're stubborn and sticking to the old definition of a kilobyte), we get 64. That's the 64KB of RAM that can be addre

This: >If we divide this by 1024 (because we're stubborn and sticking to the old definition of a kilobyte), we get 64. That's the 64KB of RAM that can be addressed by the 6502 processor. A kilobyte should be 1024 bytes, and it all comes down to address lines and powers of two. That other unit, Kib? That is a storage unit, and I sort of get it. Block devices do not have the strong relationship to the powers of two seen between a CPU and RAM / address space. Author mentioned stubborn. I see it as either a mass storage unit, or CPU addressing.