Right (on x86-32 and -64, because you can’t have 64KB pages there, though larger page sizes do exist and get used). You still cannot (e.g.) MapViewOfFile() on an address not divisible by 64KB, because Alpha[1]. As far as I understand, Windows is mostly why the docs for the Blink emulator[2] (a companion project of Cosmopolitan libc) tell you any programs under it need to use sysconf(_SC_PAGESIZE) [aka getpagesize() aka getauxval(AT_PAGESZ)] instead of assuming 4KB.

[1] https://devblogs.microsoft.com/oldnewthing/20031008-00/?p=42...

[2] https://github.com/jart/blink/blob/master/README.md#compilin...