mirror of
https://github.com/bsnes-emu/bsnes.git
synced 2025-02-24 07:02:27 +01:00
40abcfc4a5
byuu says: Changelog: - lots of code cleanups to processor/r6502 (the switch.cpp file is only halfway done ...) - lots of code cleanups to fc/cpu - removed fc/input - implemented fc/controller hex_usr, you may not like this, but I want to keep the controller port and expansion port interface separate, like I do with the SNES. I realize the NES' is used more for controllers, and the SNES' more for hardware expansions, but ... they're not compatible pinouts and you can't really connect one to the other. Right now, I've only implemented the controller portion. I'll have to get to the peripheral portion later. Also, the gamepad implementation there now may be wrong. It's based off the Super Famicom version obviously. I'm not sure if the Famicom has different behavior with latching $4016 writes, or not. But, it works in Mega Man II, so it's a start. Everyone, be sure to remap your controls, and then set port 1 -> gamepad after loading your first Famicom game with the new WIP.
73 lines
1.6 KiB
C++
73 lines
1.6 KiB
C++
struct APU : Thread {
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shared_pointer<Emulator::Stream> stream;
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APU();
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static auto Enter() -> void;
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auto main() -> void;
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auto tick() -> void;
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auto set_irq_line() -> void;
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auto set_sample(int16 sample) -> void;
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auto power() -> void;
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auto reset() -> void;
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auto readIO(uint16 addr) -> uint8;
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auto writeIO(uint16 addr, uint8 data) -> void;
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auto serialize(serializer&) -> void;
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struct Filter {
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auto run_hipass_strong(int sample) -> int;
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auto run_hipass_weak(int sample) -> int;
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auto run_lopass(int sample) -> int;
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auto serialize(serializer&) -> void;
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enum : int { HiPassStrong = 225574, HiPassWeak = 57593, LoPass = 86322413 };
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int64 hipass_strong;
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int64 hipass_weak;
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int64 lopass;
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};
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#include "envelope.hpp"
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#include "sweep.hpp"
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#include "pulse.hpp"
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#include "triangle.hpp"
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#include "noise.hpp"
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#include "dmc.hpp"
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struct FrameCounter {
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auto serialize(serializer&) -> void;
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enum : uint { NtscPeriod = 14915 }; //~(21.477MHz / 6 / 240hz)
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bool irq_pending;
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uint2 mode;
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uint2 counter;
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int divider;
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};
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auto clock_frame_counter() -> void;
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auto clock_frame_counter_divider() -> void;
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Filter filter;
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FrameCounter frame;
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uint8 enabled_channels;
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int16 cartridge_sample;
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int16 pulse_dac[32];
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int16 dmc_triangle_noise_dac[128][16][16];
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static const uint8 length_counter_table[32];
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static const uint16 ntsc_dmc_period_table[16];
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static const uint16 pal_dmc_period_table[16];
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static const uint16 ntsc_noise_period_table[16];
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static const uint16 pal_noise_period_table[16];
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};
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extern APU apu;
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