511   tty_esc("?1049h");  in vi_main()
512   tty_esc("H");  in vi_main()
651   tty_esc("?1049l");  in vi_main()
667   tty_esc("2J");  in draw_page()
668   tty_esc("H");  in draw_page()
767     tty_esc("30;44m");  in draw_page()
771     tty_esc("30;42m");  in draw_page()
775     tty_esc("30;41m");  in draw_page()
781   tty_esc("47m");  in draw_page()
782   tty_esc("30m");  in draw_page()
793   tty_esc("37m");  in draw_page()
794   tty_esc("40m");  in draw_page()
796     tty_esc("1m");  in draw_page()
799     tty_esc("0m");  in draw_page()
810     tty_esc("30m"); //foreground black  in draw_char()
811     tty_esc("47m"); //background white  in draw_char()
824   tty_esc("0m");  in draw_rune()
826     tty_esc("30m"); //foreground black  in draw_rune()
827     tty_esc("47m"); //background white  in draw_rune()
831   tty_esc("0m");  in draw_rune()