Add examples how to use the terminal emulation code in /boot/loader to

create nice startup menus. Improvements are warmly welcome. :-)

1 files changed, 74 insertions, 0 deletions

diff --git a/share/examples/bootforth/menu.4th b/share/examples/bootforth/menu.4th
new file mode 100644
index 000000000000..ad98029426e9
--- /dev/null
+++ b/share/examples/bootforth/menu.4th
@@ -0,0 +1,74 @@
+\ Simple greeting screen, presenting basic options.
+\ XXX This is far too trivial - I don't have time now to think
+\ XXX about something more fancy... :-/
+\ $Id$
+
+: title
+	f_single
+	60 11 10 4 box
+	29 4 at-xy 15 fg 7 bg
+	." Welcome to BootFORTH!"
+	me
+;
+
+: menu
+	2 fg
+	20 7 at-xy 
+	." 1.  Start FreeBSD /kernel."
+	20 8 at-xy
+	." 2.  Interact with BootFORTH."
+	20 9 at-xy
+	." 3.  Reboot."
+	me
+;
+
+: prompt
+	14 fg
+	20 11 at-xy
+	." Enter your option (1,2,3): "
+	key
+	dup emit
+	me
+;
+
+: help_text
+	10 18 at-xy ." * Choose 1 if you just want to run FreeBSD."
+	10 19 at-xy ." * Choose 2 if you want to use bootloader facilities."
+	12 20 at-xy ." See '?' for available commands, and 'words' for"
+	12 21 at-xy ." complete list of Forth words."
+	10 22 at-xy ." * Choose 3 in order to warm boot your machine."
+;
+
+: main_menu
+	begin 1 while
+		clear
+		f_double
+		79 23 1 1 box
+		title
+		menu
+		help_text
+		prompt
+		cr cr cr
+		dup 49 = if
+			drop
+			1 25 at-xy cr
+			." Loading kernel. Please wait..." cr
+			boot
+		then
+		dup 50 = if
+			drop
+			1 25 at-xy cr
+			exit
+		then
+		dup 51 = if
+			drop
+			1 25 at-xy cr
+			reboot
+		then
+		20 12 at-xy
+		." Key " emit ."  is not a valid option!"
+		20 13 at-xy
+		." Press any key to continue..."
+		key drop
+	repeat
+;