Update to v105r1 release.

byuu says:

Changelog:

  - higan: readded support for soft-reset to Famicom, Super Famicom,
    Mega Drive cores (work in progress)
      - handhelds lack soft reset obviously
      - the PC Engine also lacks a physical reset button
      - the Master System's reset button acts like a gamepad button, so
        can't show up in the menu
  - Mega Drive: power cycle wasn't initializing CPU (M68K) or APU (Z80)
    RAM
  - Super Famicom: fix SPC700 opcode 0x3b regression; fixes Majuu Ou
    [Jonas Quinn]
  - Super Famicom: fix SharpRTC save regression; fixes Dai Kaijuu
    Monogatari II's real-time clock [Talarubi]
  - Super Famicom: fix EpsonRTC save regression; fixes Tengai Makyou
    Zero's real-time clock [Talarubi]
  - Super Famicom: removed `*::init()` functions, as they were never used
  - Super Famicom: removed all but two `*::load()` functions, as they
    were not used
  - higan: added option to auto-save backup RAM every five seconds
    (enabled by default)
      - this is in case the emulator crashes, or there's a power outage;
        turn it off under advanced settings if you want
  - libco: updated license from public domain to ISC, for consistency
    with nall, ruby, hiro
  - nall: Linux compiler defaults to g++; override with g++-version if
    g++ is <= 4.8
      - FreeBSD compiler default is going to remain g++49 until my dev
        box OS ships with g++ >= 4.9

Errata: I have weird RAM initialization constants, thanks to hex_usr
and onethirdxcubed for both finding this:
http://wiki.nesdev.com/w/index.php?title=CPU_power_up_state&diff=11711&oldid=11184

I'll remove this in the next WIP.

higan/emulator/emulator.hpp

@@ -12,7 +12,7 @@ using namespace nall;
 
 namespace Emulator {
   static const string Name    = "higan";
-  static const string Version = "105 (tr1)";
+  static const string Version = "105.01";
   static const string Author  = "byuu";
   static const string License = "GPLv3";
   static const string Website = "https://byuu.org/";

higan/emulator/interface.hpp

@@ -6,7 +6,8 @@ struct Interface {
   struct Information {
     string manufacturer;
     string name;
-    bool overscan;
+    bool overscan = false;
+    bool resettable = false;
   } information;
 
   struct Medium {
@@ -59,6 +60,7 @@ struct Interface {
   //system interface
   virtual auto connect(uint port, uint device) -> void {}
   virtual auto power() -> void {}
+  virtual auto reset() -> void {}
   virtual auto run() -> void {}
 
   //time functions

higan/fc/apu/apu.cpp

@@ -71,7 +71,7 @@ auto APU::setSample(int16 sample) -> void {
   cartridgeSample = sample;
 }
 
-auto APU::power() -> void {
+auto APU::power(bool reset) -> void {
   create(APU::Enter, system.frequency());
   stream = Emulator::audio.createStream(1, frequency() / rate());
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 90.0);

higan/fc/apu/apu.hpp

@@ -12,7 +12,7 @@ struct APU : Thread {
   auto setIRQ() -> void;
   auto setSample(int16 sample) -> void;
 
-  auto power() -> void;
+  auto power(bool reset) -> void;
 
   auto readIO(uint16 addr) -> uint8;
   auto writeIO(uint16 addr, uint8 data) -> void;

higan/fc/cpu/cpu.cpp

@@ -24,16 +24,16 @@ auto CPU::step(uint clocks) -> void {
   for(auto peripheral : peripherals) synchronize(*peripheral);
 }
 
-auto CPU::power() -> void {
+auto CPU::power(bool reset) -> void {
   MOS6502::BCD = 0;
   MOS6502::power();
   create(CPU::Enter, system.frequency());
 
-  for(auto addr : range(0x0800)) ram[addr] = 0xff;
-  ram[0x0008] = 0xf7;
-  ram[0x0009] = 0xef;
-  ram[0x000a] = 0xdf;
-  ram[0x000f] = 0xbf;
+  if(!reset) for(auto& data : ram) data = 0xff;
+  ram[0x008] = 0xf7;  //todo: what is this about?
+  ram[0x009] = 0xef;
+  ram[0x00a] = 0xdf;
+  ram[0x00f] = 0xbf;
 
   r.pc.byte(0) = bus.read(0xfffc);
   r.pc.byte(1) = bus.read(0xfffd);

higan/fc/cpu/cpu.hpp

@@ -6,7 +6,7 @@ struct CPU : Processor::MOS6502, Thread {
   auto main() -> void;
   auto step(uint clocks) -> void;
 
-  auto power() -> void;
+  auto power(bool reset) -> void;
 
   //memory.cpp
   auto readRAM(uint11 addr) -> uint8;
@@ -37,7 +37,7 @@ struct CPU : Processor::MOS6502, Thread {
 //protected:
   vector<Thread*> peripherals;
 
-  uint8 ram[0x0800];
+  uint8 ram[0x800];
 
   struct IO {
     bool interruptPending;

higan/fc/interface/interface.cpp

@@ -8,6 +8,7 @@ Interface::Interface() {
   information.manufacturer = "Nintendo";
   information.name         = "Famicom";
   information.overscan     = true;
+  information.resettable   = true;
 
   media.append({ID::Famicom, "Famicom", "fc"});
 
@@ -137,7 +138,11 @@ auto Interface::connect(uint port, uint device) -> void {
 }
 
 auto Interface::power() -> void {
-  system.power();
+  system.power(/* reset = */ false);
+}
+
+auto Interface::reset() -> void {
+  system.power(/* reset = */ true);
 }
 
 auto Interface::run() -> void {

higan/fc/interface/interface.hpp

@@ -38,6 +38,7 @@ struct Interface : Emulator::Interface {
 
   auto connect(uint port, uint device) -> void override;
   auto power() -> void override;
+  auto reset() -> void override;
   auto run() -> void override;
 
   auto serialize() -> serializer override;

higan/fc/ppu/ppu.cpp

@@ -54,18 +54,20 @@ auto PPU::refresh() -> void {
   Emulator::video.refresh(buffer, 256 * sizeof(uint32), 256, 240);
 }
 
-auto PPU::power() -> void {
+auto PPU::power(bool reset) -> void {
   create(PPU::Enter, system.frequency());
 
   memory::fill(&io, sizeof(IO));
   memory::fill(&latch, sizeof(Latches));
   io.vramIncrement = 1;
 
-  for(auto& n : ciram ) n = 0;
-  for(auto& n : cgram ) n = 0;
-  for(auto& n : oam   ) n = 0;
+  if(!reset) {
+    for(auto& data : ciram ) data = 0;
+    for(auto& data : cgram ) data = 0;
+    for(auto& data : oam   ) data = 0;
+  }
 
-  for(auto& n : buffer) n = 0;
+  for(auto& data : buffer) data = 0;
 }
 
 }

higan/fc/ppu/ppu.hpp

@@ -11,7 +11,7 @@ struct PPU : Thread {
   auto frame() -> void;
   auto refresh() -> void;
 
-  auto power() -> void;
+  auto power(bool reset) -> void;
 
   //memory.cpp
   auto readCIRAM(uint11 addr) -> uint8;

higan/fc/system/serialization.cpp

@@ -31,7 +31,7 @@ auto System::unserialize(serializer& s) -> bool {
   if(signature != 0x31545342) return false;
   if(string{version} != Emulator::SerializerVersion) return false;
 
-  power();
+  power(/* reset = */ false);
   serializeAll(s);
   return true;
 }

higan/fc/system/system.cpp

@@ -62,7 +62,7 @@ auto System::unload() -> void {
   information.loaded = false;
 }
 
-auto System::power() -> void {
+auto System::power(bool reset) -> void {
   Emulator::video.reset();
   Emulator::video.setInterface(interface);
   configureVideoPalette();
@@ -73,9 +73,9 @@ auto System::power() -> void {
 
   scheduler.reset();
   cartridge.power();
-  cpu.power();
-  apu.power();
-  ppu.power();
+  cpu.power(reset);
+  apu.power(reset);
+  ppu.power(reset);
   scheduler.primary(cpu);
 
   controllerPort1.power(ID::Port::Controller1);

higan/fc/system/system.hpp

@@ -11,7 +11,7 @@ struct System {
   auto load(Emulator::Interface*) -> bool;
   auto save() -> void;
   auto unload() -> void;
-  auto power() -> void;
+  auto power(bool reset) -> void;
 
   auto init() -> void;
   auto term() -> void;

higan/md/apu/apu.cpp

@@ -52,11 +52,13 @@ auto APU::enable(bool value) -> void {
   state.enabled = value;
 }
 
-auto APU::power() -> void {
+auto APU::power(bool reset) -> void {
   Z80::bus = this;
   Z80::power();
   bus->grant(false);
   create(APU::Enter, system.frequency() / 15.0);
+
+  if(!reset) memory::fill(ram, sizeof ram);
   state = {};
 }
 

higan/md/apu/apu.hpp

@@ -8,7 +8,7 @@ struct APU : Processor::Z80, Processor::Z80::Bus, Thread {
   auto synchronizing() const -> bool override;
 
   auto enable(bool) -> void;
-  auto power() -> void;
+  auto power(bool reset) -> void;
   auto reset() -> void;
 
   auto setNMI(bool value) -> void;

higan/md/cpu/cpu.cpp

@@ -80,11 +80,13 @@ auto CPU::load(Markup::Node node) -> bool {
   return true;
 }
 
-auto CPU::power() -> void {
+auto CPU::power(bool reset) -> void {
   M68K::bus = this;
   M68K::power();
   create(CPU::Enter, system.frequency() / 7.0);
 
+  if(!reset) memory::fill(ram, sizeof ram);
+
   io = {};
   io.version = tmssEnable;
   io.romEnable = !tmssEnable;

higan/md/cpu/cpu.hpp

@@ -19,7 +19,7 @@ struct CPU : Processor::M68K, Processor::M68K::Bus, Thread {
   auto lower(Interrupt) -> void;
 
   auto load(Markup::Node) -> bool;
-  auto power() -> void;
+  auto power(bool reset) -> void;
 
   //bus.cpp
   auto readByte(uint24 address) -> uint16 override;

higan/md/interface/interface.cpp

@@ -8,6 +8,7 @@ Interface::Interface() {
   information.manufacturer = "Sega";
   information.name         = "Mega Drive";
   information.overscan     = true;
+  information.resettable   = true;
 
   media.append({ID::MegaDrive, "Mega Drive", "md"});
 
@@ -122,7 +123,11 @@ auto Interface::connect(uint port, uint device) -> void {
 }
 
 auto Interface::power() -> void {
-  system.power();
+  system.power(/* reset = */ false);
+}
+
+auto Interface::reset() -> void {
+  system.power(/* reset = */ true);
 }
 
 auto Interface::run() -> void {

higan/md/interface/interface.hpp

@@ -38,6 +38,7 @@ struct Interface : Emulator::Interface {
 
   auto connect(uint port, uint device) -> void override;
   auto power() -> void override;
+  auto reset() -> void override;
   auto run() -> void override;
 
   auto serialize() -> serializer override;

higan/md/psg/psg.cpp

@@ -34,7 +34,7 @@ auto PSG::step(uint clocks) -> void {
   synchronize(apu);
 }
 
-auto PSG::power() -> void {
+auto PSG::power(bool reset) -> void {
   create(PSG::Enter, system.frequency() / 15.0);
   stream = Emulator::audio.createStream(1, frequency() / 16.0);
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 20.0);

higan/md/psg/psg.hpp

@@ -7,7 +7,7 @@ struct PSG : Thread {
   auto main() -> void;
   auto step(uint clocks) -> void;
 
-  auto power() -> void;
+  auto power(bool reset) -> void;
 
   //io.cpp
   auto write(uint8 data) -> void;

higan/md/system/serialization.cpp

@@ -48,7 +48,7 @@ auto System::unserialize(serializer& s) -> bool {
   if(signature != 0x31545342) return false;
   if(string{version} != Emulator::SerializerVersion) return false;
 
-  power();
+  power(/* reset = */ false);
   serializeAll(s);
   return true;
 }

higan/md/system/system.cpp

@@ -61,7 +61,7 @@ auto System::unload() -> void {
   cartridge.unload();
 }
 
-auto System::power() -> void {
+auto System::power(bool reset) -> void {
   Emulator::video.reset();
   Emulator::video.setInterface(interface);
   Emulator::video.setPalette();
@@ -71,11 +71,11 @@ auto System::power() -> void {
 
   scheduler.reset();
   cartridge.power();
-  cpu.power();
-  apu.power();
-  vdp.power();
-  psg.power();
-  ym2612.power();
+  cpu.power(reset);
+  apu.power(reset);
+  vdp.power(reset);
+  psg.power(reset);
+  ym2612.power(reset);
   scheduler.primary(cpu);
 
   controllerPort1.power(ID::Port::Controller1);

higan/md/system/system.hpp

@@ -15,7 +15,7 @@ struct System {
   auto load(Emulator::Interface*, maybe<Region> = nothing) -> bool;
   auto save() -> void;
   auto unload() -> void;
-  auto power() -> void;
+  auto power(bool reset) -> void;
 
   //serialization.cpp
   auto serializeInit() -> void;

higan/md/vdp/vdp.cpp

@@ -81,11 +81,17 @@ auto VDP::refresh() -> void {
   Emulator::video.refresh(data, 1280 * sizeof(uint32), 1280, 480);
 }
 
-auto VDP::power() -> void {
+auto VDP::power(bool reset) -> void {
   create(VDP::Enter, system.frequency() / 2.0);
 
   output = buffer + 16 * 1280;  //overscan offset
 
+  if(!reset) {
+    for(auto& data : vram.memory) data = 0;
+    for(auto& data : vsram.memory) data = 0;
+    for(auto& data : cram.memory) data = 0;
+  }
+
   io = {};
   latch = {};
   state = {};

higan/md/vdp/vdp.hpp

@@ -6,7 +6,7 @@ struct VDP : Thread {
   auto step(uint clocks) -> void;
   auto refresh() -> void;
 
-  auto power() -> void;
+  auto power(bool reset) -> void;
 
   //io.cpp
   auto read(uint24 addr) -> uint16;
@@ -166,7 +166,6 @@ struct VDP : Thread {
     //serialization.cpp
     auto serialize(serializer&) -> void;
 
-  private:
     uint16 memory[32768];
   } vram;
 
@@ -179,7 +178,6 @@ struct VDP : Thread {
     //serialization.cpp
     auto serialize(serializer&) -> void;
 
-  private:
     uint10 memory[40];
   } vsram;
 
@@ -192,7 +190,6 @@ struct VDP : Thread {
     //serialization.cpp
     auto serialize(serializer&) -> void;
 
-  private:
     uint9 memory[64];
   } cram;
 

higan/md/ym2612/ym2612.cpp

@@ -154,7 +154,7 @@ auto YM2612::step(uint clocks) -> void {
   synchronize(apu);
 }
 
-auto YM2612::power() -> void {
+auto YM2612::power(bool reset) -> void {
   create(YM2612::Enter, system.frequency() / 7.0);
   stream = Emulator::audio.createStream(2, frequency() / 144.0);
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 20.0);

higan/md/ym2612/ym2612.hpp

@@ -8,7 +8,7 @@ struct YM2612 : Thread {
   auto sample() -> void;
   auto step(uint clocks) -> void;
 
-  auto power() -> void;
+  auto power(bool reset) -> void;
 
   //io.cpp
   auto readStatus() -> uint8;