I should have, for those who do not know binary numbers, shown how to
see this.  Binary numbers are similar to base-10 numbers, in that each
digit to the left is 2-times as large as the digit to the right.  In
base-10, each digit to the left is ten-times as large, for example 10
vs. 100.  In binary numbers all digits are a one or a zero, so two would
be 10.  

The easiest way to see the 4 GB limit of a 32-bit binary number is to
use a spread sheet.  In the first cell, type a 1 (one).  In the next 31
cells enter 2*<previous cell address>.  Then sum the 32 cells and you
can see the binary equivalent of four gigabytes.  Te sum represents a
binary number consisting of 32 ones, its maximum value.

Thank you,

Mark Snyder
-----Original Message-----


Do you understand binary numbers, Tony?  A 32-bit binary number cannot
go beyond 4,294,967,296 (4 gigabytes, 4*1024*1024*1024), so a 32-bit
system cannot address more than 4 GB.


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