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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/*
** Fancy hello world program using cc65.
**
** Ullrich von Bassewitz (ullrich@von-bassewitz.de)
**
** TEST version for atari5200 conio, using all four colors
*/
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#include <joystick.h>
/*****************************************************************************/
/* Data */
/*****************************************************************************/
static const char Text [] = "Hello world!";
static unsigned char colors[] = { COLOR_WHITE, COLOR_GREEN, COLOR_RED, COLOR_BLACK };
/*****************************************************************************/
/* Code */
/*****************************************************************************/
int main (void)
{
unsigned char XSize, YSize;
unsigned char PosY;
unsigned char i = 0;
/* Set screen colors */
(void) textcolor (COLOR_WHITE);
(void) bordercolor (COLOR_BLACK);
(void) bgcolor (COLOR_BLACK);
/* Clear the screen, put cursor in upper left corner */
clrscr ();
/* Ask for the screen size */
screensize (&XSize, &YSize);
/* Install joystick driver */
joy_install (joy_static_stddrv);
while (1) {
/* Draw a border around the screen */
/* Top line */
cputc (CH_ULCORNER);
chline (XSize - 2);
cputc (CH_URCORNER);
/* Vertical line, left side */
cvlinexy (0, 1, YSize - 2);
/* Bottom line */
cputc (CH_LLCORNER);
chline (XSize - 2);
cputc (CH_LRCORNER);
/* Vertical line, right side */
cvlinexy (XSize - 1, 1, YSize - 2);
/* Write the greeting in the mid of the screen */
gotoxy ((XSize - strlen (Text)) / 2, YSize / 2);
cprintf ("%s", Text);
PosY = wherey ();
textcolor (colors[i]); /* switch to color #0 */
cputsxy(3, ++PosY, "COLOR 0");
textcolor ((colors[i] + 1) & 3); /* switch to color #1 */
cputsxy(3, ++PosY, "COLOR 1");
textcolor ((colors[i] + 2) & 3); /* switch to color #2 */
cputsxy(3, ++PosY, "COLOR 2");
textcolor ((colors[i] + 3) & 3); /* switch to color #3 */ /* color #3 is the background color. So written text isn't visible. */
cputsxy(3, ++PosY, "COLOR 3");
/* Wait for the user to press and release a button */
while (!joy_read (JOY_1))
;
while (joy_read (JOY_1))
;
i = (i + 1) & 3;
/* Change colors */
textcolor (colors[i]);
bgcolor ((colors[i] + 3) & 3);
/* Clear the screen again */
clrscr ();
}
/* not reached */
joy_uninstall ();
/* Done */
return EXIT_SUCCESS;
}
|
