yumkam

FTR, I don't see anything wrong in above assembler code (it reads halfword at `0x80008ac`, ors with 4, writes resulting halfword at `0x80008ac`), so I doubt this is a compiler...

Also, why was not this bug (well, *first half* of this bug) caught in by static analysis (aka warning): it seems missing `-Wimplicit-fallthrough` (implied by `-Wextra` in gcc, but not...