Enables the features of the requested Chip Set if available, and updates the graphics database accordingly.
INPUTS
ChipRev
Chip Rev that you would like to be enabled.
RESULT
chiprevbits
Actual bits set in GfxBase->ChipRevBits0.
NOTES
This routine should only be called once. It will be called by the system in the startup-sequence, but is included in the autodocs for authors of bootblock-games that wish to take advantage of post-ECS features.