From 21bd8a06e684af2272d78c71a30e073d1cfe6651 Mon Sep 17 00:00:00 2001
From: Adrian Conlon <Adrian.conlon@gmail.com>
Date: Thu, 18 Jan 2018 17:50:15 +0000
Subject: [PATCH] Power on conditions are chip specific and *not* directly
 related to construction/destruction.

Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
---
 M6502/inc/mos6502.h   | 11 ++++++-----
 M6502/src/mos6502.cpp |  6 +++++-
 inc/Processor.h       |  2 +-
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/M6502/inc/mos6502.h b/M6502/inc/mos6502.h
index 20d4c44..21f9a5a 100644
--- a/M6502/inc/mos6502.h
+++ b/M6502/inc/mos6502.h
@@ -31,6 +31,7 @@ namespace EightBit {
 
 		virtual int execute(uint8_t opcode) final;
 		virtual int step() final;
+		virtual void powerOn() override;
 
 		uint8_t& X() { return x; }
 		uint8_t& Y() { return y; }
@@ -316,11 +317,11 @@ namespace EightBit {
 		const uint8_t RSTvector = 0xfc;
 		const uint8_t NMIvector = 0xfa;
 
-		uint8_t x;		// index register X
-		uint8_t y;		// index register Y
-		uint8_t a;		// accumulator
-		uint8_t s;		// stack pointer
-		uint8_t p;		// processor status
+		uint8_t x = 0;		// index register X
+		uint8_t y = 0;		// index register Y
+		uint8_t a = 0;		// accumulator
+		uint8_t s = 0;		// stack pointer
+		uint8_t p = 0;		// processor status
 
 		PinLevel m_soLine = Low;
 	};
diff --git a/M6502/src/mos6502.cpp b/M6502/src/mos6502.cpp
index f6ba620..57984e2 100644
--- a/M6502/src/mos6502.cpp
+++ b/M6502/src/mos6502.cpp
@@ -2,7 +2,9 @@
 #include "mos6502.h"
 
 EightBit::MOS6502::MOS6502(Bus& bus)
-: Processor(bus) {
+: Processor(bus) {}
+
+void EightBit::MOS6502::powerOn() {
 
 	X() = Bit7;
 	Y() = 0;
@@ -11,6 +13,8 @@ EightBit::MOS6502::MOS6502(Bus& bus)
 	S() = Mask8;
 
 	raise(SO());
+
+	Processor::powerOn();
 }
 
 int EightBit::MOS6502::step() {
diff --git a/inc/Processor.h b/inc/Processor.h
index cc6859f..9449140 100644
--- a/inc/Processor.h
+++ b/inc/Processor.h
@@ -76,7 +76,7 @@ namespace EightBit {
 		PinLevel& POWER() { return m_powerLine; }	// In
 
 		bool powered() { return raised(POWER()); }
-		void powerOn() { raise(POWER()); raise(HALT()); reset(); }
+		virtual void powerOn() { raise(POWER()); raise(HALT()); reset(); }
 		void powerOff() { lower(POWER()); }
 
 		int run(int limit);