- [NEW] Implementats registres de lectura del TIA

- [NEW] Registres d'escritura del TIA: Implementats VSYNC, VBLANK, WSYNC i RSYNC

atari2600.cpp

@@ -44,7 +44,11 @@ namespace atari2600
 //        } else {
             bool instruction_done = false;
             while (!instruction_done) {
-                instruction_done = m6502::tick();
+                if (!tia::is_rdy_low()) {
+                    instruction_done = m6502::tick();
+                } else {
+                    instruction_done = true;
+                }
                 tia::tick();
                 tia::tick();
                 tia::tick();