Add C support for Atari 2600 (VCS)

include/_tia.h

@@ -0,0 +1,100 @@
+/*****************************************************************************/
+/*                                                                           */
+/* Atari VCS 2600 TIA registers addresses                                    */
+/*                                                                           */
+/* Source: DASM - vcs.h                                                      */
+/*                                                                           */
+/* Florent Flament (contact@florentflament.com), 2017                        */
+/*                                                                           */
+/*****************************************************************************/
+
+/* TIA write / read registers */
+struct __tia {
+    union {
+	unsigned char vsync;
+	unsigned char cxm0p;
+    };
+    union {
+	unsigned char vblank;
+	unsigned char cxm1p;
+    };
+    union {
+	unsigned char wsync;
+	unsigned char cxp0fb;
+    };
+    union {
+	unsigned char rsync;
+	unsigned char cxp1fb;
+    };
+    union {
+	unsigned char nusiz0;
+	unsigned char cxm0fb;
+    };
+    union {
+	unsigned char nusiz1;
+	unsigned char cxm1fb;
+    };
+    union {
+	unsigned char colup0;
+	unsigned char cxblpf;
+    };
+    union {
+	unsigned char colup1;
+	unsigned char cxppmm;
+    };
+    union {
+	unsigned char colupf;
+	unsigned char inpt0;
+    };
+    union {
+	unsigned char colubk;
+	unsigned char inpt1;
+    };
+    union {
+	unsigned char ctrlpf;
+	unsigned char inpt2;
+    };
+    union {
+	unsigned char refp0;
+	unsigned char inpt3;
+    };
+    union {
+	unsigned char refp1;
+	unsigned char inpt4;
+    };
+    union {
+	unsigned char pf0;
+	unsigned char inpt5;
+    };
+    unsigned char pf1;
+    unsigned char pf2;
+    unsigned char resp0;
+    unsigned char resp1;
+    unsigned char resm0;
+    unsigned char resm1;
+    unsigned char resbl;
+    unsigned char audc0;
+    unsigned char audc1;
+    unsigned char audf0;
+    unsigned char audf1;
+    unsigned char audv0;
+    unsigned char audv1;
+    unsigned char grp0;
+    unsigned char grp1;
+    unsigned char enam0;
+    unsigned char enam1;
+    unsigned char enabl;
+    unsigned char hmp0;
+    unsigned char hmp1;
+    unsigned char hmm0;
+    unsigned char hmm1;
+    unsigned char hmbl;
+    unsigned char vdelp0;
+    unsigned char vdelp1;
+    unsigned char vdelbl;
+    unsigned char resmp0;
+    unsigned char resmp1;
+    unsigned char hmove;
+    unsigned char hmclr;
+    unsigned char cxclr;
+};