stardustgogeta / nes-emulator

An NES emulator made using SDL2 and C++.

Hello there!

I'm an engineer and computer programmer with knowledge of Java, Python, C, C++, and more.

Check out my projects below!

nes-emulator's Issues

Multithreading too slow

After implementing multithreading to try and decouple the CPU operation from the main loop, the code runs much slower (as much as 10x slower, per my testing). This is potentially a problem for emulation speed in the future, so this may need to be replaced with a single-threaded approach that simply jumps to the proper point in the opcode execution when the next CPU cycle is triggered.

Compiling with GCC optimizations causes segmentation fault

When compiled with the -O1, -O2, or -O3 flags, the program will encounter a segmentation fault upon reaching the declaration of a std::ifstream or std::ofstream variable. The reason for this occurring is unclear, but it does not occur with -O0 or -Og.

Git Bash on Windows does not work by default with POSIX threads

In order to get multithreading (with <thread>) working on my Windows development environment, I needed to use the POSIX version of MinGW. However, it seems the executables that are built cannot be run by Git Bash for Windows. PowerShell and Windows CMD work fine, but Git Bash silently exits.

This can be fixed by deleting the file libstdc++-6.dll from C:\Program Files\Git\mingw64\bin, but this is inconvenient and may cause other negative effects.