问题
Involving the Windows operating system, a lot of things use the number 32, especially with Win32. I see it in everything from system folders:
C:\Windows\System32\
to system files:
C:\Windows\System32\win32k.sys
to Windows app development:
Develop a Win32 Application
The significance of the number 32 and computers makes me think 32-bit processors, but, if this is correct, why is there a need to explicitly mention 32-bit systems?
Googling around brought me to the Win32 API. This is, I presume, the main cause of its frequent use, but that doesn't change my question. The Windows operating system works perfectly fine on 64-bit systems.
Is Windows specialized for 32-bit systems?
Or is this just a historical thing (i.e. Windows and its API were developed before the 64-bit system emerged)?
回答1:
Before Win32 there was Win16 (although perhaps maybe not using that name), and running 32-bit code was a special feature or it had special requirements, especially your CPU had to be able to do so.
- Intel 8086 was a 16-bit CPU with 20-bit address space.
- Intel 80286 was a 16-bit CPU with 24-bit address space.
- Intel 80386 was full 32-bit, both registers and address space.
来源：https://stackoverflow.com/questions/45436953/why-is-everything-named-win32