32 And 64 bit Programs

[polish husaria]

can some one help me with understand 32 bit and 64 bit becuase i im trying to do my research on it and im not really turn up anything usfull and i know that there 64 bit programs but what about the 64 hardwere, can some one straten me out becuase im buggen

[Corbs]

Well, I'm definately not an expert, but one small comparison could be with registers.

For example, in assembly, there exist a restricted number of variables.

In 16 bits assembly, the registers would be:

CS, DS, ES, SS
AX, BX, CX, EX
IP, SP, BP
SI, DI

Note that all registers with a 'X' as the suffixe consist of two "sub" registers. ex: AX = AL + AH.

Basically, 32 bits brings in more registers and so does 64 bits. Why would we want more registers? It means we can keep more local information stored in those registers (vital information) and have less access to the memory. Therefore, memory access is reduced thus speeding the process.

Also, I believe the size of an integer, for instance, passes from 32 bits to 64 bits. Hence, more information can be stored in a single occurrence.

That's probably as far as I know concerning the 64 bits architecture. As I said, I'm definately not an expert.

Try searching in wikipedia or google or if you're looking for something heavier, try looking at http://computer.howstuffworks.com/microprocessor6.htm

Great website if you're wondering how stuff works

P.S.: If I posted any errors, please do rectify the errors!

[polish husaria]

thank you for the help