#FDS BIOS NESTOPIA PRO#

there's often arbitary inversions going on. with different amplifier processes between various models, Famicom vs. There isn't a correct answer for a single channel like that. Not sure which is right, also not sure if the real thing gets flipped by the console between exiting the cart and exiting the console I got derailed from it when I did all of that MMC5 stuff.īen Boldt wrote: ↑ Sun 9:49 amf you look carefully, you can also tell that the source waveform shape is flipped vertically on FCEUx. If I could find a good emulator for this, I might go back and revisit that using better samples. Back when I first started working on that hack, I had wanted to use some samples longer than 32 and they did not work correctly on any emulator I tried. When I play it with several different emulators, I do have a lot of extra pops and much uglier waveform than the real chip - drastically different looking. Is there an emulator that does this properly that you know of? I put a lot of work into the music scores for a Namco-163 version of Final Fantasy and I found that my cartridge sounded great, very smooth, and the waveform looked great. If Everdrive has an excuse, it's because it's based on older documents or implementation, not the wiki. PowerPak's implementation has the excuse that it's older than this. The wiki has been quite clear that the length register is 6 bits wide for about 8 years now. No, the source of that misunderstanding is Goroh's document from 1997, which many older emulators based their implementation on. I think this is partially because our Wiki needs refinement.

#FDS BIOS NESTOPIA PRO#

N8 Pro spams $00 writes to DPCM, leading to lots and lots of DPCM bugs.īen Boldt wrote: ↑ Sat 12:03 pmI have never seen ANYTHING other than a real Namco-163 chip that supports this.

Multiplexer hiss from 5+ channels isn't present.Custom patches suffer from high feedback.Patches use approximations of the real chip, so anything using the expansion audio doesn't work by default.PCM is missing the eighth bit, making it essentially a clone of the 7-bit PCM feature of the stock 2A03.

Analogue output isn't emulated, but it is approximated, by sampling the 5B squares at a ridiculous 50 MHz.Using values to mix tone and one of the other two features or using an unused feature by itself produces nothing. Other sound modes (noise, envelope) don't work and as such, can't be combined with others to make different sounds.FDS BIOS uses a special custom BIOS instead, which doesn't work with some unlicensed titles (namely the Super PIG games).Modulation is broken, sometimes it tries to work, but doesn't.Most pulse waves seem to be off by around 1-2%.Mostly accurate, up until you distort the sawtooth wave using the extra volume capabilities.Features not used/rarely used are often unimplemented/not working, each chip will have it's own extra detail on what does and doesn't work.Bus conflicts don't work, anything relating to the hardware relying on it just doesn't function correctly.Blue Mario on the Discord server provided a list of observed inaccuracies in the EverDrive N8 and EverDrive N8 Pro.Įverdrive N8/N8 Pro Expansion Audio and Mapper Bugs/inaccuracies

Fds bios nestopia