Introduce an IntelProcessor base class to allow known good implementation to be shared.

Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>

src/IntelProcessor.cpp

@@ -0,0 +1,36 @@
+#include "stdafx.h"
+#include "IntelProcessor.h"
+
+EightBit::IntelProcessor::IntelProcessor(Memory& memory)
+: Processor(memory) {
+	MEMPTR().word = 0;
+}
+
+EightBit::IntelProcessor::~IntelProcessor() {
+}
+
+void EightBit::IntelProcessor::initialise() {
+	Processor::initialise();
+	MEMPTR().word = 0;
+}
+
+
+void EightBit::IntelProcessor::push(uint8_t value) {
+	m_memory.ADDRESS().word = --sp.word;
+	m_memory.reference() = value;
+}
+
+void EightBit::IntelProcessor::pushWord(register16_t value) {
+	push(value.high);
+	push(value.low);
+}
+
+uint8_t EightBit::IntelProcessor::pop() {
+	m_memory.ADDRESS().word = sp.word++;
+	return m_memory.reference();
+}
+
+void EightBit::IntelProcessor::popWord(register16_t& output) {
+	output.low = pop();
+	output.high = pop();
+}