I don't remember which tools the Super FX chip was designed with but maybe some other ex-Argonauts can chime in on that. I know it was pretty basic gate level stuff and wasn't designed with a high level language (Ben Cheese was an old skool chip designer)... we started using VHDL later on, when we designed the ARC etc.

@Dang, really strange to see the dead comments (sibling to this, and elsewhere) as they are 100% relevant and straight from the source.

If I missed something then apologies.