changed hw_lcd to use ARM core correct tick counter instead of [what was actually] just an instruction count. this seems to fix timing issues with the 3DS_Homebrew_Pong3Dv2 demo.

src/core/src/arm/arm_interface.h

@@ -24,32 +24,65 @@
 
 #pragma once
 
+#include "common.h"
 #include "common_types.h"
 
 /// Generic ARM11 CPU interface
 class ARM_Interface {
 public:
     ARM_Interface() {
+        num_instructions_ = 0;
     }
 
     ~ARM_Interface() {
     }
 
+    /// Step CPU by one instruction
     void Step() {
         ExecuteInstruction();
-        ticks_++;
+        num_instructions_++;
     }
-    
-    virtual void SetPC(u32 pc) = 0;
+ 
+    /**
+     * Set the Program Counter to an address
+     * @param addr Address to set PC to
+     */
+    virtual void SetPC(u32 addr) = 0;
+
+    /*
+     * Get the current Program Counter
+     * @return Returns current PC
+     */
     virtual u32 PC() = 0;
+
+    /**
+     * Get an ARM register
+     * @param index Register index (0-15)
+     * @return Returns the value in the register
+     */
     virtual u32 Reg(int index) = 0;
+
+    /**
+     * Get the current CPSR register
+     * @return Returns the value of the CPSR register
+     */
     virtual u32 CPSR() = 0;  
 
-    u64 ticks() { return ticks_; }
+    /**
+     * Returns the number of clock ticks since the last rese
+     * @return Returns number of clock ticks
+     */
+    virtual u64 GetTicks() = 0;
+
+    /// Getter for num_instructions_
+    u64 num_instructions() { return num_instructions_; }
 
 private:
     
+    /// Execture next instruction
     virtual void ExecuteInstruction() = 0;
 
-    u64 ticks_;
+    u64 num_instructions_;  ///< Number of instructions executed
+
+    DISALLOW_COPY_AND_ASSIGN(ARM_Interface);
 };