[zAy0LfpBZLC8mAC]

> (note that the size of short isn't guaranteed to be anything specifically, other than 2 <= sizeof(short) <= sizeof(int)).

That isn't guaranteed. sizeof(short) and sizeof(int) are both allowed to be 1 on a system with chars at least 16 or 32 bits wide, respectively.

[int_19h]

Yep, you're right.

Which just goes to show that these are not the types you want to be using for any kind of portable binary I/O.