There had been library API on PS1, PS2 had been an exception with the DMA chains and VU code exposed to developers but Xbox 1 and all later consoles come with l

There had been library API on PS1, PS2 had been an exception with the DMA chains and VU code exposed to developers but Xbox 1 and all later consoles come with libraries and no poking into registers business. So you can already try your idea by writing an Xbox 1 emulator (which is as much a PC as PS4 or Xbone). Spoiler alert: these libraries are statically linked on top of developers going around them all the time. Ultra High Level emulation seems to work only on Nintendo consoles, see https://en.wikipedia.org/wiki/UltraHLE https://en.wikipedia.org/wiki/UltraHLE https://en.wikipedia.org/wiki/Dolphin_%28emulator%29 https://en.wikipedia.org/wiki/Dolphin_%28emulator%29