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Slow walks further towards a functioning Spectrum.

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This commit is contained in:
Thomas Harte
2021-03-18 10:18:17 -04:00
parent 5a1bda1d82
commit 97249b0edd
4 changed files with 109 additions and 5 deletions
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Machines/Sinclair/ZXSpectrum/ZXSpectrum.cpp
+65 -4
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@@ -10,15 +10,76 @@
#include "../../MachineTypes.hpp"
#include "../../../Analyser/Static/StaticAnalyser.hpp"
#include "../../../Analyser/Static/ZXSpectrum/Target.hpp"
#include <array>
namespace {
const unsigned int ClockRate = 3'500'000;
}
namespace Sinclair {
namespace ZXSpectrum {
using Model = Analyser::Static::ZXSpectrum::Target::Model;
template<Model model> class ConcreteMachine:
public MachineTypes::ScanProducer,
public MachineTypes::TimedMachine,
public Machine {
public:
ConcreteMachine(const Analyser::Static::ZXSpectrum::Target &target, const ROMMachine::ROMFetcher &rom_fetcher)
{
set_clock_rate(ClockRate);
// With only the +2a and +3 currently supported, the +3 ROM is always
// the one required.
const auto roms =
rom_fetcher({ {"ZXSpectrum", "the +2a/+3 ROM", "plus3.rom", 64 * 1024, 0x96e3c17a} });
if(!roms[0]) throw ROMMachine::Error::MissingROMs;
memcpy(rom_.data(), roms[0]->data(), std::min(rom_.size(), roms[0]->size()));
// TODO: insert media, set up memory map.
(void)target;
}
// MARK: - TimedMachine
void run_for(const Cycles cycles) override {
// TODO.
(void)cycles;
}
// MARK: - ScanProducer
void set_scan_target(Outputs::Display::ScanTarget *scan_target) final {
(void)scan_target;
}
Outputs::Display::ScanStatus get_scaled_scan_status() const final {
// TODO.
return Outputs::Display::ScanStatus();
}
private:
std::array<uint8_t, 64*1024> rom_;
std::array<uint8_t, 128*1024> ram_;
};
}
}
using namespace Sinclair::ZXSpectrum;
Machine *Machine::ZXSpectrum(const Analyser::Static::Target *target, const ROMMachine::ROMFetcher &rom_fetcher) {
/* TODO */
(void)target;
(void)rom_fetcher;
const auto zx_target = dynamic_cast<const Analyser::Static::ZXSpectrum::Target *>(target);
switch(zx_target->model) {
case Model::Plus2a: return new ConcreteMachine<Model::Plus2a>(*zx_target, rom_fetcher);
case Model::Plus3: return new ConcreteMachine<Model::Plus3>(*zx_target, rom_fetcher);
}
return nullptr;
}