bootsel

Names = {"shell","voidOS","jupiterOS"}
Folder ={"/rom/programs/shell","/voidOS","/jupiterOS"}
selected = 1
function render(sel_OS)
   term.clear()
   term.setCursorPos(1,1)
   print("Select OS to boot:")
   For  i=1,3 do
      If sel_OS == i then
         print("["..Names[i].."]")
      else
         print" "..Names[i].." ")
      end
   end
end

while true do
   e = { os.pullEvent("key")}
   if e[2] == 200 then
      if selected <= 2 then
         selected = selected + 1
      end
   elseif e[2] == 208 then
      if selected >= 1 then
         selected = selected - 1
      end
   elseif e[2] == 28 then
      shell.run(Folder[selected])
   end
   render(selected)
   sleep(0.25)
end