Imported existing sources

2018-12-16 22:19:06 +01:00
parent b848581174
commit 619ec483e7
69 changed files with 7961 additions and 36 deletions
@@ -0,0 +1,59 @@
+#include "ffe.h"
+
+// Qt includes
+#include <QDataStream>
+
+// local includes
+#include "nesemulator.h"
+
+Ffe::Ffe(NesEmulator &emu, const Rom &rom) :
+    Board(emu, rom)
+{
+}
+
+Ffe::~Ffe()
+{
+}
+
+void Ffe::writeEx(quint16 address, quint8 value)
+{
+    switch (address)
+    {
+    case 0x4501:
+        m_irqEnable = false;
+        m_emu.interrupts().removeFlag(Interrupts::IRQ_BOARD);
+        break;
+    case 0x4502:
+        m_irqCounter = (m_irqCounter & 0xFF00) | value;
+        break;
+    case 0x4503:
+        m_irqEnable = true;
+        m_irqCounter = (m_irqCounter & 0x00FF) | (value << 8);
+        break;
+    }
+}
+
+void Ffe::onCpuClock()
+{
+    if (m_irqEnable)
+    {
+        m_irqCounter++;
+        if (m_irqCounter >= 0xFFFF)
+        {
+            m_irqCounter = 0;
+            m_emu.interrupts().addFlag(Interrupts::IRQ_BOARD);
+        }
+    }
+}
+
+void Ffe::readState(QDataStream &dataStream)
+{
+    Board::readState(dataStream);
+    dataStream >> m_irqEnable >> m_irqCounter;
+}
+
+void Ffe::writeState(QDataStream &dataStream) const
+{
+    Board::writeState(dataStream);
+    dataStream << m_irqEnable << m_irqCounter;
+}