Compiling C++ to asm.js with Emscripten is another weird architecture you might actually use these days.

Unaligned accesses don't trap with a SIGBUS or anything, they just round the pointer value down to an aligned address and read whatever that is.

Reading from and writing to NULL will generally succeed (just as on SGI).

Function pointers are just indices into tables of functions, one table per "function type" (number of arguments, whether the arguments are int or float, whether it returns an argument or not). Thus, two different function pointers may have the same bit pattern.