1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
% example_02.bc
%
% Very minimalistic demo. Writes a short message in graphics mode and lets you
% boot linux or start from local disk.
%
% Notes:
% - the only difference to example_01 is that we use graphics mode
%
% Test with (from top level dir [/usr/share/gfxboot]) 'gfxtest -t example_02'.
%
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
% Some constants we probably need.
%
/true 0 0 eq def
/false 0 0 ne def
% pointer type
/t_ptr 12 def
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
% Convert integer to pointer.
%
% ( int1 -- ptr1 )
%
/cvp { t_ptr settype } def
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
% Input event handling.
%
% ( key -- input_buffer menu_entry action )
%
% key
% bit 0-7 ascii
% bit 8-15 scan code
% bit 16-32 status bits (ctrl, shift...)
%
% action
% 0: ok, stay in input loop
% 1: switch to text mode (that is, continue with the non-gfxboot bootloader interface)
% >=2: boot
%
% Notes:
% - key = 0 indicates the bootloader timeout is up.
% - input_buffer is the command line that you would have normally entered in the bootloader.
% note that for syslinux it must start with the menu label string but not for grub
% - menu_entry is the number of the menu entry you want to boot
%
/KeyEvent {
/key exch def
% 'linux' & 'harddisk' are labels in our test bootloader config (created by 'gfxtest')
key 0xff and 'l' eq { "linux" 1 2 return } if
key 0xff and 'd' eq {
% return to text mode first so you can see the error message
3 setmode pop
"harddisk" 0 2 return
} if
"" 0 0
} def
% set graphics mode
% 0x114 = 800x600, 16 bit
0x114 setmode pop
% load and set font
"font.fnt" findfile setfont
% set default color, e.g. yellow
0xe8e800 setcolor
% write some message
70 280 moveto
"Press 'l' to start linux or 'd' to boot from disk." show
% say we're fine ('false' tells bootloader not to use gfxboot)
true
|
