mirror of
https://github.com/TomHarte/CLK.git
synced 2024-07-04 18:29:40 +00:00
90 lines
2.1 KiB
C++
90 lines
2.1 KiB
C++
//
|
|
// State.hpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 13/05/2020.
|
|
// Copyright © 2020 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#ifndef State_hpp
|
|
#define State_hpp
|
|
|
|
#include "../../../Reflection/Enum.hpp"
|
|
#include "../../../Reflection/Struct.hpp"
|
|
#include "../Z80.hpp"
|
|
|
|
namespace CPU {
|
|
namespace Z80 {
|
|
|
|
/*!
|
|
Provides a means for capturing or restoring complete Z80 state.
|
|
|
|
This is an optional adjunct to the Z80 class. If you want to take the rest of the Z80
|
|
implementation but don't want any of the overhead of my sort-of half-reflection as
|
|
encapsulated in Reflection/[Enum/Struct].hpp just don't use this class.
|
|
*/
|
|
struct State: public Reflection::StructImpl<State> {
|
|
/*!
|
|
Provides the current state of the well-known, published internal registers.
|
|
*/
|
|
struct Registers: public Reflection::StructImpl<Registers> {
|
|
uint8_t a;
|
|
uint8_t flags;
|
|
uint16_t bc, de, hl;
|
|
uint16_t bcDash, deDash, hlDash;
|
|
uint16_t ix, iy, ir;
|
|
uint16_t program_counter, stack_pointer;
|
|
uint16_t memptr;
|
|
int interrupt_mode;
|
|
bool iff1, iff2;
|
|
|
|
Registers();
|
|
} registers;
|
|
|
|
/*!
|
|
Provides the current state of the processor's various input lines that aren't
|
|
related to an access cycle.
|
|
*/
|
|
struct Inputs: public Reflection::StructImpl<Inputs> {
|
|
bool irq;
|
|
bool nmi;
|
|
bool bus_request;
|
|
bool wait;
|
|
|
|
Inputs();
|
|
} inputs;
|
|
|
|
/*!
|
|
Contains internal state used by this particular implementation of a 6502. Most of it
|
|
does not necessarily correlate with anything in a real 6502, and some of it very
|
|
obviously doesn't.
|
|
*/
|
|
struct ExecutionState: public Reflection::StructImpl<ExecutionState> {
|
|
bool is_halted;
|
|
|
|
uint8_t requests;
|
|
uint8_t last_requests;
|
|
uint8_t temp8;
|
|
uint8_t operation;
|
|
uint16_t temp16;
|
|
unsigned int flag_adjustment_history;
|
|
uint16_t pc_increment;
|
|
|
|
ExecutionState();
|
|
} execution_state;
|
|
|
|
/// Default constructor; makes no guarantees as to field values beyond those given above.
|
|
State();
|
|
|
|
/// Instantiates a new State based on the processor @c src.
|
|
State(const ProcessorBase &src);
|
|
|
|
/// Applies this state to @c target.
|
|
void apply(ProcessorBase &target);
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
#endif /* State_hpp */
|