Virtual Game Boy is the Nintendo GameBoy(tm) emulator on X-Window.
Test your VGB installation with the command(default):
vgb /usr/X11R6/share/vgb/CART.GB
Virtual GameBoy (VGB) is a portable emulator of the Nintendo GameBoy
handheld videogame console. It allows to run most of GameBoy software
on a personal computer, as well as debug this software. As VGB is
written in a portable C programming language, it runs on many
different platforms and operating systems
WWW: http://www.komkon.org/fms/VGB/
https://www.lant.com.tw/~lantw44/git/freebsd-ports-gnome' title='freebsd-ports-gnome Git repository'/>