The V86 return path is one of the longest microcode sequences in the 386. It pops nine DWORDs from the stack -- EIP, CS, EFLAGS, ESP, SS, ES, DS, FS, GS -- compared to three for a normal IRET. The microcode then sets up fixed access rights for every segment register:
A simpler API would mean fewer concepts, fewer interactions between concepts, and fewer edge cases to get right resulting in more confidence that implementations actually behave consistently.，更多细节参见51吃瓜
assert d["1"] is None, "Sanity prevails! 😌"，这一点在WPS下载最新地址中也有详细论述
(Some spoilers below but no major reveals.)，更多细节参见同城约会