the most impressive part, to me, was how thoroughly he reverse engineered what looks to be a crazy complicated CPU architecture - the Saturn has four of them.
Also, I love that his original motivation was to use the sound processor for mixing chiptune, and basically opening up the entire system at metal level is a happy by product.
ALSO, the fact that he decided that his first working prototype was too hands on and finding a way to piggyback the video playback expansion card to make the mod orders of magnitude less complicated to install / execute.
Wasn't it only one of those CPU's though? He mentioned there is a CPU dedicated to disk operation and that's the one no one had been able to get a ROM dump of, which in turn enabled all the other stuff? Not trying to downplay his achievement or anything, I'm new to all this but it's easy to see that this is some truly amazing work.
2 CPUs, 2 GPUs, and there is a separate CPU dedicated to disk operation which was (almost) completely isolated. His achievement was getting access to that disk CPU, but that access allows access to the rest of the CPUs.
Also, I love that his original motivation was to use the sound processor for mixing chiptune, and basically opening up the entire system at metal level is a happy by product.
ALSO, the fact that he decided that his first working prototype was too hands on and finding a way to piggyback the video playback expansion card to make the mod orders of magnitude less complicated to install / execute.
Super impressive stuff