mirror of
https://github.com/TomHarte/CLK.git
synced 2024-10-31 18:04:37 +00:00
92 lines
2.0 KiB
Plaintext
92 lines
2.0 KiB
Plaintext
//
|
|
// MOS6522Bridge.m
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 18/06/2016.
|
|
// Copyright 2016 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#import "MOS6522Bridge.h"
|
|
|
|
#include "6522.hpp"
|
|
#include <memory>
|
|
|
|
@class MOS6522Bridge;
|
|
|
|
class VanillaVIAPortHandler: public MOS::MOS6522::PortHandler {
|
|
public:
|
|
MOS6522Bridge *bridge;
|
|
bool irq_line;
|
|
uint8_t port_a_value;
|
|
uint8_t port_b_value;
|
|
bool control_line_values[2][2];
|
|
|
|
/*
|
|
All methods below here are to replace those defined by
|
|
MOS::MOS6522::PortHandler.
|
|
*/
|
|
void set_interrupt_status(bool new_status) {
|
|
irq_line = new_status;
|
|
}
|
|
|
|
uint8_t get_port_input(MOS::MOS6522::Port port) {
|
|
return port ? port_b_value : port_a_value;
|
|
}
|
|
|
|
void set_control_line_output(MOS::MOS6522::Port port, MOS::MOS6522::Line line, bool value) {
|
|
control_line_values[int(port)][int(line)] = value;
|
|
}
|
|
};
|
|
|
|
@implementation MOS6522Bridge {
|
|
VanillaVIAPortHandler _viaPortHandler;
|
|
std::unique_ptr<MOS::MOS6522::MOS6522<VanillaVIAPortHandler>> _via;
|
|
}
|
|
|
|
- (instancetype)init {
|
|
self = [super init];
|
|
if(self) {
|
|
_via = std::make_unique<MOS::MOS6522::MOS6522<VanillaVIAPortHandler>>(_viaPortHandler);
|
|
_viaPortHandler.bridge = self;
|
|
}
|
|
return self;
|
|
}
|
|
|
|
- (void)setValue:(uint8_t)value forRegister:(NSUInteger)registerNumber {
|
|
_via->write((int)registerNumber, value);
|
|
}
|
|
|
|
- (uint8_t)valueForRegister:(NSUInteger)registerNumber {
|
|
return _via->read((int)registerNumber);
|
|
}
|
|
|
|
- (void)runForHalfCycles:(NSUInteger)numberOfHalfCycles {
|
|
_via->run_for(HalfCycles((int)numberOfHalfCycles));
|
|
}
|
|
|
|
- (BOOL)irqLine {
|
|
return _viaPortHandler.irq_line;
|
|
}
|
|
|
|
- (void)setPortAInput:(uint8_t)portAInput {
|
|
_viaPortHandler.port_a_value = portAInput;
|
|
}
|
|
|
|
- (uint8_t)portAInput {
|
|
return _viaPortHandler.port_a_value;
|
|
}
|
|
|
|
- (void)setPortBInput:(uint8_t)portBInput {
|
|
_viaPortHandler.port_b_value = portBInput;
|
|
}
|
|
|
|
- (uint8_t)portBInput {
|
|
return _viaPortHandler.port_b_value;
|
|
}
|
|
|
|
- (BOOL)valueForControlLine:(MOS6522BridgeLine)line port:(MOS6522BridgePort)port {
|
|
return _viaPortHandler.control_line_values[port][line];
|
|
}
|
|
|
|
@end
|