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#include "nes/sys/nes.hh"
#include "nes/sys/types/snapshot.hh"
namespace nes::sys
{
nes::nes(display& display, span<u8 const> const rom_data)
: cartridge_{ rom_data }
, display_{ display }
, ppu_{ cpu_, cartridge_, display_ }
, cpu_{ ppu_, cartridge_, controller_1_, controller_2_ }
, status_{ cartridge_.get_status() }
{
}
auto nes::step(std::chrono::microseconds const delta) -> void
{
step(cycle_count::from_duration(delta));
}
auto nes::step() -> void
{
if (get_status() != status::success) { return; }
status_ = cpu_.step();
while (ppu_.get_cycles() < cpu_.get_cycles())
{
ppu_.step();
}
}
auto nes::step(cycle_count const delta) -> void
{
current_cycles_ += delta;
while (cpu_.get_cycles() < current_cycles_ && get_status() == status::success)
{
step();
}
}
auto nes::step_to_nmi() -> void
{
while (cpu_.is_nmi_pending())
{
step();
}
while (!cpu_.is_nmi_pending())
{
step();
}
}
auto nes::get_snapshot() -> snapshot
{
auto res = snapshot{};
res.sram = std::vector(cartridge_.get_ram().begin(), cartridge_.get_ram().end());
cpu_.build_snapshot(res);
ppu_.build_snapshot(res);
return res;
}
} // namespace nes::sys
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