3 files changed, 14 insertions, 2 deletions
diff --git a/qtmips_machine/peripheral.cpp b/qtmips_machine/peripheral.cpp
index 161f760..ac74c2a 100644
--- a/qtmips_machine/peripheral.cpp
+++ b/qtmips_machine/peripheral.cpp
@@ -50,13 +50,19 @@ bool SimplePeripheral::wword(std::uint32_t address, std::uint32_t value) {
     printf("SimplePeripheral::wword address 0x%08lx data 0x%08lx\n",
            (unsigned long)address, (unsigned long)value);
 #endif
+    emit write_notification(address, value);
+
     return true;
 }
 
 std::uint32_t SimplePeripheral::rword(std::uint32_t address) const {
+    std::uint32_t value = 0x12345678;
 #if 0
     printf("SimplePeripheral::rword address 0x%08lx\n",
            (unsigned long)address);
 #endif
-    return 0x12345678;
+
+    emit read_notification(address, &value);
+
+    return value;
 }
diff --git a/qtmips_machine/peripheral.h b/qtmips_machine/peripheral.h
index dfc4db7..92df1d7 100644
--- a/qtmips_machine/peripheral.h
+++ b/qtmips_machine/peripheral.h
@@ -51,6 +51,11 @@ public:
     SimplePeripheral();
     ~SimplePeripheral();
 
+signals:
+    void write_notification(std::uint32_t address, std::uint32_t value);
+    void read_notification(std::uint32_t address, std::uint32_t *value) const;
+
+public:
     bool wword(std::uint32_t address, std::uint32_t value);
     std::uint32_t rword(std::uint32_t address) const;
 };
diff --git a/qtmips_machine/qtmipsexception.h b/qtmips_machine/qtmipsexception.h
index e48bf1c..e592ef0 100644
--- a/qtmips_machine/qtmipsexception.h
+++ b/qtmips_machine/qtmipsexception.h
@@ -90,7 +90,8 @@ protected:
     EXCEPTION(UnalignedJump, Runtime) \
     EXCEPTION(UnknownMemoryControl, Runtime) \
     EXCEPTION(OutOfMemoryAccess, Runtime) \
-    EXCEPTION(Sanity,)
+    EXCEPTION(Sanity,) \
+    EXCEPTION(SyscallUnknown, Runtime) \
 
 #define EXCEPTION(NAME, PARENT) \
     class QtMipsException##NAME : public QtMipsException##PARENT { \