4 ms·
The IBM PC's 20-bit addressing was 16 times the size of 16-bit addresses. From 20-bit to 32-bit, 4096 times larger. 32 to 64 is 4,294,967,296 times larger (!).
by shadowofneptune 4y ago
The IBM PC's 20-bit addressing was 16 times the size of 16-bit addresses. From 20-bit to 32-bit, 4096 times larger. 32 to 64 is 4,294,967,296 times larger (!). The scale alone makes using all this space unlikely on a PC.