VIA (should have been checked in)

diff --git a/src/SystemVIA.cpp b/src/SystemVIA.cpp
new file mode 100644 (file)
index 0000000..7aa1bd7
--- /dev/null
+++ b/src/SystemVIA.cpp
@@ -0,0 +1,188 @@
+#include "SystemVIA.h"
+#include <QDebug>
+
+SystemVIA::SystemVIA(Memory *inside):
+  MemoryMap(inside) {
+
+  inside->hookMemoryMap(0xFE40, 0xFE5F, this);
+
+  mPinLevelA = 0xFF;
+  mPinLevelB = 0xFF;
+
+  // Set (almost) everything to zero.
+
+  mIRA = 0;
+  mIRB = 0xF0;  // The top bit is set hig
+  mORA = 0;
+  mORB = 0;
+  mDDRA = 0;
+  mDDRB = 0;
+  mACR = 0;
+  mTimer1 = 0;
+  mTimer2 = 0;
+  mT1LL = 0;
+  mT1LH = 0;
+  mT2LL = 0;
+  mT2LH = 0;
+  mSR = 0;
+
+}
+
+int SystemVIA::read(int address) {
+  qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+
+  switch (address) {
+  case 0xfe40:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe41:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe42:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe43:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe44:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe45:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe46:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe47:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe48:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe49:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe4a:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe4b:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe4c:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe4d:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe4e:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  case 0xfe4f:
+    qDebug() << QString("System VIA read from %1").arg(address, 4, 16);
+    break;
+
+  }
+  return 0;
+}
+
+void SystemVIA::write(int address, int value) {
+  switch (address)
+    {
+    case 0xfe40:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe41:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe42:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe43:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe44:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe45:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe46:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe47:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe48:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe49:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe4a:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe4b:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe4c:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe4d:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe4e:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+
+    case 0xfe4f:
+      qDebug() << QString("System VIA write to %1").arg(address, 4, 16);
+      break;
+    }
+}
+
+// Stubs for now:
+
+void SystemVIA::keyDown(int row, int col) {
+  Q_UNUSED(row);
+  Q_UNUSED(col);
+  // ...
+}
+
+void SystemVIA::keyUp(int row, int col) {
+  Q_UNUSED(row);
+  Q_UNUSED(col);
+  // ...
+}
+
+void SystemVIA::allKeysUp() {
+  // ...
+}

diff --git a/src/SystemVIA.h b/src/SystemVIA.h
new file mode 100644 (file)
index 0000000..5093ec6
--- /dev/null
+++ b/src/SystemVIA.h
@@ -0,0 +1,80 @@
+#ifndef SYSTEMVIA_H
+#define SYSTEMVIA_H 1
+
+#include "Memory.h"
+#include "MemoryMap.h"
+
+class SystemVIA: public MemoryMap {
+
+  Q_OBJECT
+
+ public:
+  SystemVIA(Memory *inside);
+
+  int read(int address);
+  void write(int address, int value);
+
+  public slots:
+
+  /**
+   * Received when a key is pressed.
+   *
+   * \param key  The key.  Multiply the
+   *             row number by 100 and add
+   *             the column number.
+   */
+  void keyDown(int key);
+
+  /**
+   * Received when a key is released.
+   *
+   * \param key  The key.  Multiply the
+   *             row number by 100 and add
+   *             the column number.
+   */
+  void keyUp(int key);
+
+  /**
+   * Received to cause all keys to be
+   * released.
+   */
+  void allKeysUp();
+
+ signals:
+  /**
+   * Sent to turn the Caps Lock LED on or off.
+   *
+   * \param on    Whether it's on.
+   */
+  void CapsLED(bool caps, bool on);
+
+  /**
+   * Sent to turn the Shift Lock LED on or off.
+   *
+   * \param on    Whether it's on.
+   */
+  void ShiftLED(bool caps, bool on);
+
+ protected:
+
+  // These are the registers of the 6522 VIA.
+
+  int mORB;
+  int mORA;
+  int mDDRB;
+  int mDDRA;
+  int mT1CL;
+  int mT1CH; // maybe do these as one?
+  int mT1LL;
+  int mT1LH;
+  int mT2CL;
+  int mT2CH;
+  int mSR;
+  int mACR;
+  int mPCR;
+  int mIFR;
+  int mIER;
+
+};
+
+#endif