The theoretical memory limits in 16, 32 and 64 bit machines are as follows:
16 bit = 65,536 bytes (64 Kilobytes)
32 bit = 4,294,967,296 bytes (4 Gigabytes)
64 bit = 18,446,744,073,709,551,616 (16 Exabytes)
I remember from DOS / Windows 3.11 days, that 16 bit memory could be separated into segments, so that a 16 bit machine could access a greater amount of memory than 64 Kilobytes.
I have a machine with 16GB of memory, and am dual booting a 32bit operating system and a 64bit operating system. I can access all 16GB from 64bit, but only 3.21GB in 32bit.
So, my question is, if: If 16bit operating systems allowed greater thatthan 64KB memory access due to memory segmenting, why do 32bit machines not follow the same pricipalprinciple?