I've programmed for DOS and BIOS before, and using the `h` suffix for `int 21h` and `int 20h` and `int 10h` and `int 13h` still feels natural. I never wrote `h`

I've programmed for DOS and BIOS before, and using the `h` suffix for `int 21h` and `int 20h` and `int 10h` and `int 13h` still feels natural. I never wrote `h` literals for anything but a few interrupt numbers, though. And when I programmed for 32-bit Linux, `int 0x80` felt more natural.