We have names of the VERA registers CTRL, FX_MULT, etc, but we don't have defined names for the flags.
If we set both masks and values in the documentation we can use these in the various compiler constants files to give a unified set of names and values. These names would directly tie to the names in the docs. (like the register names would)
For example MAP_HEIGHT would be 0b11000000, and MAP_HEIGHT_64 could be 0b01000000, so we could use
lda L0_CONFIG
and #~MAP_HEIGHT
ora #MAP_HEIGHT_64
sta L0_CONFIG