Ugh...mobile link, this should work:

http://research.microsoft.com/en-us/people/smcdirm/managedti...

There is an inspiration from synchronous reactive languages, which are in turn inspired by hardware design (not sure if they predate or post date vhdl); you can read the related work section of the essay-linked conference paper if you are interested about lineage.

Glitch is a bit weirder in that all statements execute at the same time within a tick, their order isn't just unfixed: they are guaranteed to see all of each other's effects (except event handlers, which execute more hardware-like discretely to do state transitions).