1
0
mirror of https://github.com/TomHarte/CLK.git synced 2024-11-10 23:05:01 +00:00
CLK/Processors/6502Esque/6502Selector.hpp
Thomas Harte 18e8d6ce06 Makes an effort to factor out the 6502's [lazy] flags.
This is preparatory to deciding which instructions, if any, are worth factoring out.
2020-10-05 22:23:33 -04:00

47 lines
1.7 KiB
C++

//
// 6502Selector.hpp
// Clock Signal
//
// Created by Thomas Harte on 28/09/2020.
// Copyright © 2020 Thomas Harte. All rights reserved.
//
#ifndef _502Selector_h
#define _502Selector_h
#include "../6502/6502.hpp"
#include "../65816/65816.hpp"
namespace CPU {
namespace MOS6502Esque {
enum class Type {
TNES6502, // the NES's 6502, which is like a 6502 but lacks decimal mode (though it retains the decimal flag)
T6502, // the original [NMOS] 6502, replete with various undocumented instructions
TSynertek65C02, // a 6502 extended with BRA, P[H/L][X/Y], STZ, TRB, TSB and the (zp) addressing mode and a few other additions
TRockwell65C02, // like the Synertek, but with BBR, BBS, RMB and SMB
TWDC65C02, // like the Rockwell, but with STP and WAI
TWDC65816, // the slightly 16-bit follow-up to the 6502
};
/*
Machines that can use either a 6502 or a 65816 can use CPU::MOS6502Esque::Processor in order to select the proper
class in much the same way that a raw user of CPU::MOS6502::Processor would set the personality. Just provide one
of the type enums as above as the appropriate template parameter.
*/
template <Type processor_type, typename BusHandler, bool uses_ready_line> class Processor:
public CPU::MOS6502::Processor<CPU::MOS6502::Personality(processor_type), BusHandler, uses_ready_line> {
using CPU::MOS6502::Processor<CPU::MOS6502::Personality(processor_type), BusHandler, uses_ready_line>::Processor;
};
template <typename BusHandler, bool uses_ready_line> class Processor<Type::TWDC65816, BusHandler, uses_ready_line>:
public CPU::WDC65816::Processor<BusHandler> {
using CPU::WDC65816::Processor<BusHandler>::Processor;
};
}
}
#endif /* _502Selector_h */