I know that the GB-Z80 port is unsupported. But does
that mean that its pragmas and compiler options are not
documented in the official SDCC manual and that the
compiler does not show them in the usage information?
There are options/pragmas for ROM and RAM bank
switching which are very helpful for large Gameboy
programs. Also the keywords "banked"
and "nonbanked" flag specific calling conventions.
If there still is some interest in completing the
documentation and the usage help, I am willing to
contribute the appropriate sections.