EightBit/inc/Bus.h
Adrian Conlon 15e1258f40 Rearrange the 6809 code such that I can fire memory events.
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
2018-08-19 00:55:59 +01:00

55 lines
1.2 KiB
C++

#pragma once
#include <cstdint>
#include "Signal.h"
#include "Register.h"
#include "EventArgs.h"
namespace EightBit {
class Bus {
public:
virtual ~Bus() = default;
Signal<EventArgs> WritingByte;
Signal<EventArgs> WrittenByte;
Signal<EventArgs> ReadingByte;
Signal<EventArgs> ReadByte;
register16_t ADDRESS() const { return m_address; }
register16_t& ADDRESS() { return m_address; }
uint8_t DATA() const { return m_data; }
uint8_t& DATA() { return m_data; }
uint8_t peek() { return reference(); }
uint8_t peek(uint16_t address) { return reference(address); }
void poke(uint8_t value) { reference() = value; }
void poke(uint16_t address, uint8_t value) { reference(address) = value; }
uint16_t peekWord(uint16_t address);
uint8_t read();
template<class T> uint8_t read(const T address) {
ADDRESS() = address;
return read();
}
void write();
void write(uint8_t value);
template<class T> void write(const T offset, const uint8_t value) {
ADDRESS() = offset;
write(value);
}
protected:
virtual uint8_t& reference(uint16_t address) = 0;
uint8_t& reference() { return reference(ADDRESS().word); }
private:
uint8_t m_data = 0xff;
register16_t m_address = 0xffff;
};
}