nesdev.com

This is far from complete, and not really playable, thought I would dump it out here anyways in case anyone is interested in the technical side of it. It was fun as hell to make, but I don't know if/when I'll ever have the time to get back to it. https://github.com/Memblers/nesxidy (description copi...

I'm loving this thread, good stuff. Regarding OAM DMA, if your mapper is watching the bus and is fully in control of CHR-RAM (big IFs, I know), there's no need to hijack the CPU bus. Other than for palette setup, you'll not need to touch $2006/$2007 when you have a VRAM port in the mapper. Do the DM...

Im here for arpoths too. What up memblers!? Also, do you still have ass-raping Vikings on the high seas anywhere? It was a sequel I made in the early aughts. I think I sent it to drew. Hey man, it's been a while! I do have that. There was another XM with it, both are really fun tracks. I was meanin...

You might want to look at the NSF rips instead of the full games. NSF files have INIT and PLAY routines. The init routine basically is how you "load" the song or sound effect. Play routine simply plays it, called 60 times a second. Usually the person ripping an NSF file has to insert their own code ...

The dual 6502 processors, by sharing $6000 - $7fff. The cart carries a noac (umc6561). The two systems run different codes respectively, and shake hands through IRQ. All buses need level shifters for separation. It looks like the VS system? Now that is a fun idea. If the cart also had A/V output an...

I am affraid I dont know how to add coins tracking, nor change the logo.. I could probably design a new board and get that working but the palette and coin acceptance things would be out of my league :( If you do take on this project, you might want to consider supporting the PC10 version. It's the...

What would make the Squeedo Jr. design cheap is what it lacks, not needing a PRG ROM, CHR RAM, or WRAM chips. The board itself is NROM-sized. Well, technically there is a PRG-ROM (made from a level translator chip) but it's only 1 byte - $4C. So it sits in a JMP $4C4C loop during configuration. Whic...

I have a project that I call Squeedo Jr. that sort of is like the SA-1. Sadly, it's been idle for a few years, far too long. Most likely when I do try to make another NES cart board, it's likely to be that one because it's the one I've been most excited about, by far. It's fairly ambitious and would...

I found a video of somebody recording off of a SMB arcade machine, and although he does have a brown shirt, it's a much darker shade of brown than what I typically see in emulators. https://www.youtube.com/watch?v=mKk2TkKRAC0 Other than the different PPU, I think Nintendo's VS and PC10 cabinets nor...

Oddly, SMB does something like that, too. It ramps it up to $30 when you're playing, then ramps it down to $00 when you die. But why, it's a mystery.

For a debugger you might try NESICIDE. 8bitworkshop might work for that, too (it's a little tricky to link with it, there's info on the forum about it though). Looking at the source, I'm not sure where the NMI gets enabled. It is calling the audio update from NMI, which is correct. There's potential...

The lines with the range error all have (indirect),y addressing mode. I think this means the variable is not being used as a zeropage address. Other lines accessing that variable aren't a problem because they can use absolute mode. The (indirect),y lines that it didn't complain about are inside an I...

That should be NROM-128, then. Check pins 27 and 1, does the board connect them both to 5V (it should)?

The linker uses "memory areas" and "segments". You put your code/data into segments, and the linker uses the config file you supply it with to output your stuff into the memory areas. My guess about the error is because "RAM" is the name of a memory area, and not a segment. We'd need to see the .cfg...

Hi Memblers, The last code you post can be compile. But it is not work. It only show line on the screen, but no balls. Is it work on your side ? Thanks. I haven't tried to assemble and run it yet, only compile. I'm surprised it does compile, the first one I posted gave the missing asm fragment erro...