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
|
# Cursor-based motions.
#
# To build a disk image:
# ./translate_mu_baremetal baremetal/ex7.mu # emits disk.img
# To run:
# qemu-system-i386 disk.img
# Or:
# bochs -f baremetal/boot.bochsrc # boot.bochsrc loads disk.img
#
# Expected output: an interactive game a bit like "snakes". Try pressing h, j,
# k, l.
fn main {
var space/eax: grapheme <- copy 0x20
set-cursor-position 0/screen, 0, 0
{
show-cursor 0/screen, space
var key/eax: byte <- read-key 0/keyboard
{
compare key, 0x68/h
break-if-!=
var g/eax: grapheme <- copy 0x2d/dash
draw-grapheme-at-cursor 0/screen, g, 0x31
cursor-left 0
}
{
compare key, 0x6a/j
break-if-!=
var g/eax: grapheme <- copy 0x7c/vertical-bar
draw-grapheme-at-cursor 0/screen, g, 0x31
cursor-down 0
}
{
compare key, 0x6b/k
break-if-!=
var g/eax: grapheme <- copy 0x7c/vertical-bar
draw-grapheme-at-cursor 0/screen, g, 0x31
cursor-up 0
}
{
compare key, 0x6c/l
break-if-!=
var g/eax: grapheme <- copy 0x2d/dash
draw-grapheme-at-cursor 0/screen, g, 0x31
cursor-right 0
}
loop
}
}
|