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https://github.com/bsnes-emu/bsnes.git
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e9d2d56df9
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.
46 lines
905 B
C++
46 lines
905 B
C++
#include <fc/fc.hpp>
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namespace Famicom {
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#include "memory.cpp"
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#include "timing.cpp"
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#include "serialization.cpp"
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CPU cpu;
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auto CPU::Enter() -> void {
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while(true) scheduler.synchronize(), cpu.main();
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}
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auto CPU::main() -> void {
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if(io.interruptPending) return interrupt();
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instruction();
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}
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auto CPU::step(uint clocks) -> void {
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Thread::step(clocks);
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synchronize(apu);
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synchronize(ppu);
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synchronize(cartridge);
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for(auto peripheral : peripherals) synchronize(*peripheral);
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}
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auto CPU::power(bool reset) -> void {
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MOS6502::BCD = 0;
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MOS6502::power();
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create(CPU::Enter, system.frequency());
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if(!reset) for(auto& data : ram) data = 0xff;
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ram[0x008] = 0xf7; //todo: what is this about?
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ram[0x009] = 0xef;
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ram[0x00a] = 0xdf;
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ram[0x00f] = 0xbf;
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r.pc.byte(0) = bus.read(0xfffc);
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r.pc.byte(1) = bus.read(0xfffd);
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memory::fill(&io, sizeof(IO));
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io.rdyLine = 1;
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}
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}
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