It's been a while since I stalked B3D, but some of the old timers (if any still exist) might find this amusing/illuminating from a nostalgia POV:
"The original driver source code for the PowerVR Series 1 GPUs : Midas arcade, PCX1 and PCX2. This source code is provided as a reference, without any guarantees that it will compile, or function correctly when compiled."
https://github.com/powervr-graphics/PowerVR-Series1
All thanks to a small team at IMG who did an archaeological dig
"The original driver source code for the PowerVR Series 1 GPUs : Midas arcade, PCX1 and PCX2. This source code is provided as a reference, without any guarantees that it will compile, or function correctly when compiled."
https://github.com/powervr-graphics/PowerVR-Series1
All thanks to a small team at IMG who did an archaeological dig