On synchronous systems

In a VHDL-based mixed hardware/software system such as Controlix, it is necessary to get used to the idea that the software side, even when running on top of a software emulation layer such as POSIX, must also run synchronously using an external clock provided by either software such as GTKWave, a simple POSIX timer daemon of some sort, or a hardware-provided pulse from a custom device driver or bare interrupt handler/distributor. Device drivers will need to run using polling mode or an emulated equivalent which uses some sort of I/O buffer FIFO - my current thinking is that Controlix itself will not expose interrupt or any other sort of async notification abstraction.