SpritesMind.Net

I'm looking forward to your technical posts. While I have no interest in writing a Megadrive emulator, a M68000 emulator is still on my todo list for other reasons.

Good to see you back into active development

Agreed, the PWM works as documented with the only exception: When both channels are set to OFF (0x00 written to xMD), they will output normally as if the value 0x05 was written to the xMD registers. This is actually needed by a lot of games. This contradicts the statement in the 32X hardware manual:...

I've been working on various sound cores and recently implemented the 32X PWM for my own VGM Player / emulation project. The repository can be found here: https://github.com/michelgerritse/TritonCore The last feature I need to implement is the channel mapping for the PWM sound channels (minus some S...

So I finally took some time to create an Excel sheet with all the envelope timing (decay only at the moment) given by the FM Towns datasheet. In case you are wondering, the FM Towns uses a YM2612 and their documentation is very complete (but in Japanese). You can find the Excel sheet here: https://g...

While you are looping forever on loop marks, the channel generates no output since the output never changes. That basically answers the question: The loop stop sample (0xFF) will be discarded and the next channel will get updated. If the RF5C164 wouldn't do this you would and up with a continuous p...

(Not sure if this belongs here or in the SegaCD subforum) I've been cleaning up my Ricoh RF5C68 / 164 core the other day. There are a couple of things I would like to discuss: 1. The RF5C164 can access 128KB of memory (according to the manuals), meaning the internal processing will use 17.10 fixed p...

Not sure if anyone has seen this already:

https://hiddenpalace.org/News/Sega_of_J ... ource_Code

Edit: In case nobody noticed, it contains the official YM2612 application manual (in Japanese)

Just to be sure, did you also disable the feedback for operator 1 ? Could you share a screenshot of the scope output ?

Hey Stef, good to see you! Yes, it has been way too long but real life kicked in. When you have a ton of things to do emulation was not my top priority.
I hope I have some more spare time to spent so I can work on things I've been dying to do the past years.

Thank you for that. I was already suspecting it but got it now confirmed. For now I will leave my SN76489 core as it is and move on to the next thing. I'm sure there is still a bug or 2 to fix, but I will look into it later once my audio engine is able to resample streams above 200kHz so the SN76489...

It has been almost 2 decades since I released something to the public. Some might remember me as "Gerrie", author of some old Sega emulators (I lost access to my old mail address, so I created a new account). I recently decided to continue a project which I have been working on and off in the past 2...