nesdev.org

Why am I giving ideas for making repro :lol: Jedi move: there is no such thing as pile of Koei famicom games, no such thing. The problem there is that NES owners would need both the gigantic ETROM PCB, as well as a 72-pin adapter, all jammed into an already crammed cart. Disclaimer: I ordered my Fa...

Probably not a huge risk there, as the NES version of the PCBs are all on games that are prohibitively expensive already.

I think no further programs need to be run on the Vs. System. At least, nothing comes to mind. Thank you very much for your help! Glad I could help! I'm kinda sad now that we're done! ;) Well, I guess I can turn my attention full-time to solving my NES-on-VS mirroring issues. May also try some home...

Scratch that -- went ahead and burned and verified results.

Locations of not-zeroes are what's interesting. Question about that... I noticed that whatever the MSB of the address was, is what the entire page would return (in flipped order). e.g. If I flipped to address 0x5401, the entire page would be full of "45". If I flipped to 0x5101, the page ...

Just for paranoia's sake, does the title screen work correctly if you get rid of the sockets? (Like it did in the first place) Yes. As soon as I put it all back with all pins connected, title screen looks good, the black screen showing the score and number of lives looks good, and then the game sta...

Did folding the pin over in the socket actually keep it from making contact? Yes. There should have been no connection there. The socket that normally holds the PPU is plastic and is the type that has no metal near the entry hole. So the pin that was folded out of the way, was flat over the top of ...

... Thank you so much. That's perfect. We know what it's doing now, too, because someone wrote an online implementation of the Berlekamp-Massey Algorithm that can determine what exact LFSR is being used. The LFSR inside is apparently x²³ + x¹⁸ + 1 Interesting! Well, does that conclude trying to ide...

Thought you might be able to do something with a binary version of the 127's output.

• 127 reader → Could you run this test again and play with both sticks? I looked at the 127 reader again, and did a bit more thorough looking around. I swept the entire 0x5eXX range. The only page that had anything was the 0x5e01 . However, while randomly paging through larger segments of memory, I...

Mirroring in the NES is basically because the VRAM doesn't have room for the four pattern tables that they decided to address [because doubling the on-system VRAM would have been incredibly expensive at the time (beaten by: lidnariq), but still to allow for cartridge-based expansion for those who w...

Alright, I have posted a non-published video of your test on Youtube . I hope to hear your response back on here! One or two of the tests would advance too quickly (like the advance button wasn't debounced), so I retried them and tried to push the button really quickly so that the results could be s...

OK! Here's a small test suite. Includes a file arbib.prg which you can burn to a 64KiB 'PROM. You can reuse the Atari RBI Baseball CHA. Okay, I'll have this burned and run sometime this weekend. :) I'll probably do video this time, just because I don't want to get pictures out of sequence again. Th...

It ain't perfect, but it's a step in the right direction! Disclaimer: I did not ground or tie the pin to +5V yet, do you think that might clear up what's in this video? Part of it could be, but the sprites would not be caused by that. That behavior's just wrong. In the video, to me anyway , it look...

Proposed topic rename: Red Tent Research Agree. Unless it's easier to have a mod split-off a new thread and move the posts occurring after the original issue was resolved to that thread. Sorry, that sentence was worded terribly. Out of respect for the original creator of the VS Castlevania daughter...