From 9b3d46b2d8b6b229b33226620b6bd9546955ed87 Mon Sep 17 00:00:00 2001
From: "K.Ohta" <whatisthis.sowhat@gmail.com>
Date: Mon, 16 Mar 2015 19:34:57 +0900
Subject: [PATCH] [VM][FM7][MC6809] Add BUSLINE determines MPU is (not) halted.

---
 source/src/vm/mc6809.cpp | 12 ++++++++----
 source/src/vm/mc6809.h   | 11 ++++++++++-
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/source/src/vm/mc6809.cpp b/source/src/vm/mc6809.cpp
index 5b9005b29..e74b04828 100644
--- a/source/src/vm/mc6809.cpp
+++ b/source/src/vm/mc6809.cpp
@@ -280,7 +280,8 @@ void MC6809::reset()
 	icount = 0;
 	int_state = 0;
 	extra_icount = 0;
-	
+	busreq = false;
+   
 	DPD = 0;	/* Reset direct page register */
 	CC = 0;
 	D = 0;
@@ -421,10 +422,13 @@ void MC6809::run_one_opecode()
 {
 
 	if ((int_state & MC6809_HALT_BIT) != 0) {	// 0x80
-		icount = 0;
-	        extra_icount = 0;
+		if(icount > 0) icount -= 8;  // OK?
+	   	if(!busreq) write_signals(&outputs_bus_halt, 0xffffffff);
+		busreq = true;
 		return;
-	} else
+	}
+	if(busreq) write_signals(&outputs_bus_halt, 0x00000000);
+	busreq = false;
         if(int_state & MC6809_NMI_BIT) {
 		int_state &= ~MC6809_NMI_BIT;
 		int_state &= ~MC6809_SYNC_IN; /* clear SYNC flag */
diff --git a/source/src/vm/mc6809.h b/source/src/vm/mc6809.h
index 4e179a8a8..82167cc82 100644
--- a/source/src/vm/mc6809.h
+++ b/source/src/vm/mc6809.h
@@ -20,6 +20,7 @@ class MC6809 : public DEVICE
 private:
 	// context
 	DEVICE *d_mem;
+	outputs_t outputs_bus_halt; // For sync
 	
 	// registers
 	pair pc; 	/* Program counter */
@@ -32,6 +33,7 @@ private:
 	pair ea;	/* effective address */
 	
 	uint8 int_state;
+	bool busreq;
 	int icount;
 	int extra_icount;
 	inline uint32 RM16(uint32 Addr);
@@ -343,7 +345,10 @@ private:
 
 	
 public:
-	MC6809(VM* parent_vm, EMU* parent_emu) : DEVICE(parent_vm, parent_emu) {}
+	MC6809(VM* parent_vm, EMU* parent_emu) : DEVICE(parent_vm, parent_emu) 
+	{
+		init_output_signals(&outputs_bus_halt);
+	}
 	~MC6809() {}
 	
 	// common functions
@@ -360,6 +365,10 @@ public:
 	{
 		d_mem = device;
 	}
+	void set_context_bus_halt(DEVICE* device, int id, uint32 mask)
+	{
+		register_output_signal(&outputs_bus_halt, device, id, mask);
+	}
 };
 
 #endif
-- 
2.11.0