32-bit is also a term given to a generation of computers in which 32-bit processors were the norm.The range of
integer values that can be stored in 32 bits is
0 through 4,294,967,295 or −2,147,483,648 through 2,147,483,647 using
two's complement encoding. Hence, a processor with 32-bit
memory addresses can directly access 4
GiB of
byte-addressable memory.The external address and data buses are often wider than 32 bits but both of these are stored and manipulated internally in the processor as 32-bit quantities. For example, the
Pentium Pro processor is a 32-bit machine, but the external address bus is 36 bits wide, and the external data bus is 64 bits wide.
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