Add conio example for Atari

src/test/kc/examples/atarixl/conio-test.c

@@ -0,0 +1,53 @@
+#pragma encoding(atascii)
+#pragma zp_reserve(0x00..0x7f)
+
+#include <atari-xl.h>
+#include <printf.h>
+#include <conio.h>
+
+void main() {
+	// hide the cursor
+	cursor(0);
+
+	// change colors
+	bgcolor(DARK_ORANGE);
+	bordercolor(MEDIUM_BLUE);
+	textcolor(WHITE);
+
+	// print some text at a location
+	cputsxy(0, 1, "Hello, World!\n");
+
+	// skip a line
+	gotoxy(0, 3);
+
+	// set inverse text and use printf to output a string
+	revers(1);
+	char *name = "Mark";
+	printf("Hello, %s - press a key!\n", name);
+
+	// wait for user keypress
+	waitkey();
+
+	// clear screen
+	clrscr();
+
+	// reset reverse and do some scrolling lines.
+	revers(0);
+	for(int i: 0..50) {
+		printf("Scrolling lines ... %d\n", i);
+	}
+	waitkey();
+
+	// turn scroll off and do more lines
+	scroll(0);
+	for(int i: 51..200) {
+		printf("Some wrapping lines ... %d\n", i);
+	}
+	waitkey();
+
+}
+
+void waitkey() {
+	while(!kbhit()) ;
+	clrkb();
+}