1 files changed, 70 insertions, 0 deletions
diff --git a/sid/sidplay-libs-2.1.0/libsidplay/src/c64/c64cia.h b/sid/sidplay-libs-2.1.0/libsidplay/src/c64/c64cia.h
new file mode 100644
index 00000000..b9626405
--- /dev/null
+++ b/sid/sidplay-libs-2.1.0/libsidplay/src/c64/c64cia.h
@@ -0,0 +1,70 @@
+/***************************************************************************
+                          c64cia.h  -  C64 CIAs
+                             -------------------
+    begin                : Fri Apr 4 2001
+    copyright            : (C) 2001 by Simon White
+    email                : s_a_white@email.com
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef _c64cia_h_
+#define _c64cia_h_
+
+// The CIA emulations are very generic and here we need to effectively
+// wire them into the computer (like adding a chip to a PCB).
+
+#include "c64env.h"
+#include "../mos6526/mos6526.h"
+
+/* CIA 1 specifics:
+   Generates IRQs
+*/
+class c64cia1: public MOS6526
+{
+private:
+    c64env &m_env;
+
+protected:
+    void interrupt (bool state)
+    {
+        m_env.interruptIRQ (state);
+    }
+
+public:
+    c64cia1 (c64env *env)
+    :MOS6526(&(env->context ())),
+     m_env(*env) {}
+    const char *error (void) {return "";}
+};
+
+/* CIA 2 specifics:
+   Generates NMIs
+*/
+class c64cia2: public MOS6526
+{
+private:
+    c64env &m_env;
+
+protected:
+    void interrupt (bool state)
+    {
+        if (state)
+            m_env.interruptNMI ();
+    }
+
+public:
+    c64cia2 (c64env *env)
+    :MOS6526(&(env->context ())),
+     m_env(*env) {}
+    const char *error (void) {return "";}
+};
+
+#endif // _c64cia_h_