Add devel/rgbds
RGBDS is a free GBZ80 assembler/linker package for the Game Boy and
Game Boy Color. RGBDS additionally contains 2 extra tools to fix
ROM headers, and convert PNG files to the Game Boy's planar tile
format.
The binaries it provides are:
rgbasm(1) (assembler)
rgblink(1) (linker)
rgbfix(1) (checksum/header fixer)
rgbgfx(1) (PNG-to-Game Boy graphics converter)
PR: 243645
Submitted by: trigex@waifu.club (old version 0.3.9)