quake style dropdown menu using virtual terminal to display chars
http://compsci.ca/v3/viewtopic.php?t=39585
inspired by 8086tiny emulator
https://github.com/MurphyMc/lilt https://github.com/MurphyMc/libtmt https://github.com/netpipe/emscripten-projects/tree/master/emulators/x86/8086tiny