Access Atari OS variables by structure.

[cc65] / include / cbm510.h

diff --git a/include/cbm510.h b/include/cbm510.h
index 25ea0754039287a1f4cb5b2c4334cba0c20c7fc1..3d6ccd209e7b5ce6ace65331b0f937c1b67a54c9 100644 (file)
--- a/include/cbm510.h
+++ b/include/cbm510.h
@@ -92,6 +92,13 @@
 #define COLOR_LIGHTBLUE         0x0E
 #define COLOR_GRAY3             0x0F
 
+/* Masks for joy_read */
+#define JOY_UP_MASK             0x01
+#define JOY_DOWN_MASK           0x02
+#define JOY_LEFT_MASK           0x04
+#define JOY_RIGHT_MASK          0x08
+#define JOY_BTN_1_MASK          0x10
+
 /* Define hardware */
 #include <_vic2.h>
 #define VIC     (*(struct __vic2*)0xD800)