gb-test-roms VS Ryujinx

Make sure you incorporate testing your implementation with test roms: https://github.com/retrio/gb-test-roms Do this as early in the project as possible. This will save you a huge migraine later on.

Have you tested your emulator against blargg's instruction timing test ROM? I believe this one only checks cycle counts, not memory timings: https://github.com/retrio/gb-test-roms/tree/master/instr_timing

Yeah the source for cpu_instrs is in github. https://github.com/retrio/gb-test-roms/tree/master/cpu_instrs/source

I actually have a question about this. I've been building a Gameboy emulator, the CPU works but when it runs the RET instruction the PC jumps to some really high address like 0x2000 or something when it's meant to jump to somewhere around 0x400 instead (after comparing it with another GB emulator). I think the RET address is meant to be read from HRAM, where the stack is stored, but when I look there it is the value around 0x2000 like I mentioned earlier. Are there any special quirks with this section of memory that I might not have implemented? I'm pretty much just reading and writing from an array for HRAM at the moment. I'm having the issue on one of blarggs cpu-instrs test roms https://github.com/retrio/gb-test-roms/blob/master/cpu_instrs/cpu_instrs.gb

So just start with implementing the CPU's fetch/decode/execute loop and a rudimentary memory bus, so that you can run simple test ROMs. You don't even need a display for many test ROMs (like Blargg's well-known test suite, which writes the results to the serial port as well as the display). After that you can do test-driven development (in a way) and focus on making more and more tests pass. Don't worry about details until you need to.

It looks like the test enables interrupts and then invokes the timer interrupt.

Their C# JIT [1] generates x86_64 or ARM native code. This is why it's fast.

1: https://github.com/Ryujinx/Ryujinx/tree/master/src/ARMeilleu...

This isn't true anymore. It was their first approach, but since then they have switched to their own JIT recompiler. You can read their rationale here: https://github.com/Ryujinx/Ryujinx/pull/693

For the MacOS port, they explain in the blog post you linked that they use an hypervisor, meaning the original game binary runs untranslated. (with the option to use an ARM-to-ARM JIT)

Thanks for the guide. I am new to Ryujinx, but is there a version that runs Monster Hunter Rise: Sunbreak? I searched on reddit and github but I got lost on the part where gdkchan tried to solve the issue here. Maybe it doesn't work on Mac?

Same as previous post. Latest version did change things related to hashing https://github.com/Ryujinx/Ryujinx/commit/58907e2c290473326e5ab74bdfe1429b8a518ba4 so probably bug?

Did you try the build in here: https://github.com/Ryujinx/Ryujinx/pull/4899

As it’s emulator, you can’t be sure about games performance as a whole. Some perform better, some - worse, some won’t run at all. You can have a quick look at this video for example https://youtu.be/9XyjErqV3pI Then you should check if the games you’re interested in are considered playable https://github.com/Ryujinx/Ryujinx/wiki/ Actually, there is another one emulator Yuzu and some games may perform better with it. BTW I have a bit better 5500u processor with 16 dual-channel. It performs quite well even with aaa games till 2020. But there are also so many good old games :) Currently I’m playing Warcraft 3 and it still looks and plays very well.