1 files changed, 74 insertions, 0 deletions
diff --git a/lib/nes/nes.cc b/lib/nes/nes.cc
new file mode 100644
index 0000000..01e339d
--- /dev/null
+++ b/lib/nes/nes.cc
@@ -0,0 +1,74 @@
+#include "nes/nes.hh"
+#include "nes/mapper.hh"
+#include "nes/display.hh"
+#include "nes/util/rgb.hh"
+#include "nes/util/snapshot.hh"
+#include <iostream>
+
+namespace nes
+{
+	nes::nes(cartridge cartridge, display& display)
+		: cartridge_{ std::move(cartridge) }
+		, display_{ display }
+		, mapper_{ mapper::select(cartridge_) }
+		, ppu_{ cpu_, mapper_, display_ }
+		, cpu_{ ppu_, mapper_, controller_1_, controller_2_ }
+	{
+		if (!cartridge_.is_valid())
+		{
+			std::cerr << "Cartridge not valid!" << std::endl;
+			std::abort();
+		}
+
+		display_.clear(rgb{});
+		display_.switch_buffers();
+		display_.clear(rgb{});
+	}
+
+	auto nes::step(std::chrono::microseconds const delta) -> void
+	{
+		step(cycle_count::from_duration(delta));
+	}
+
+	auto nes::step(cycle_count const delta) -> void
+	{
+		current_cycles_ += delta;
+		while (cpu_.get_cycles() < current_cycles_)
+		{
+			cpu_.step();
+			while (ppu_.get_cycles() < cpu_.get_cycles())
+			{
+				ppu_.step();
+			}
+		}
+	}
+
+	auto nes::step_to_nmi() -> void
+	{
+		while (cpu_.is_nmi_pending())
+		{
+			cpu_.step();
+			while (ppu_.get_cycles() < cpu_.get_cycles())
+			{
+				ppu_.step();
+			}
+		}
+		while (!cpu_.is_nmi_pending())
+		{
+			cpu_.step();
+			while (ppu_.get_cycles() < cpu_.get_cycles())
+			{
+				ppu_.step();
+			}
+		}
+	}
+
+	auto nes::get_snapshot() -> snapshot
+	{
+		auto res = snapshot{};
+		res.sram = std::vector(cartridge_.get_ram(), cartridge_.get_ram() + cartridge_.get_ram_length());
+		cpu_.build_snapshot(res);
+		ppu_.build_snapshot(res);
+		return res;
+	}
+} // namespace nes
+\ No newline at end of file