nesdev.org

Vs. System uses 4-screen VRAM. Try setting the 4-screen bit in your ROM's header and seeing if it makes the same garbage in an emulator. That's a good suggestion. Do you know if OpenEmu (for Mac) will honor the mirroring bit in the header? My Windows machine is at a friend's house currently, so I o...

To make sure I understand: DIP switch bank 1 is the bank for the master CPU, and DIP switch bank 2 is for the slave CPU? Yes. So theoretically, whatever is in the master CPU shouldn't be able to care about what's going on in bank 2, and vice versa? That is my understanding, as I didn't see Balloon ...

So I had posted recently about converting a no-mapper game (NES Balloon Fight) to run on real VS hardware. Mapper 0 games seem to be a breeze, since ROM mirroring isn't an issue and there aren't any additional complexities introduced by adding CHR-RAM or other strange add-on hardware. The next logic...

Okay, so maybe a little clarification is in order. The test ran fine on the slave side regardless of dip switch status. It was only after moving to the master side that it suddenly took issue with switch 8 in bank 1. Disclaimer: I was lazy, so I left my quirky NES Balloon Fight in the system (but on...

Here's the results of my tests. I'm not sure if I was comprehensive enough, or if my captions to these photos make sense. Ultimately, we ran the tests on the Slave side first, and then the master side. The only weird anomalies were that none of the coin counter operations worked as expected, we neve...

I was happy about the idea of a software solution to the problem, but when I realized people would have to mod their zappers too to make it work, I wasn't so interested anymore. You'd need both, though, to get it going; software to adapt for latency, and hardware to detect the light. It's not a bad...

If you already have a Vs. SMB ROM set around, you can just use its CHR (i.e. use it for ROM 2A or 8A). Yeah, I probably have 2 sets, so no worries there. Sounds easy enough. So am I understanding correctly, that this is basically a tool to test/time some behavior on the hardware? Is there any reaso...

On an entirely unrelated note, would you be willing to run the Vs. System characterization ROM I wrote? We do already have data from Memblers's Vs. System, but it'd be nice to get a second data point at all. Hey, that sounds like fun! I read the whole thread you linked me to, but I'm not sure what ...

I assume the ROMs were in the "slave" slot ? Actually, they were on the slave side of the board... Hmm... (Runs out to garage to try swapping sides) HOLY COW. That worked! Any idea what the technical reason is behind it? I'm just wondering if there's any type of modification I could do to...

Over the Labor Day weekend, I decided I wanted to convert some of my favorite NES games to the VS system. So like any other self-respecting nerd, I downloaded the Balloon Fight (USA) NES ROM, stripped the NES header off of it, split it into the PRG and CHR ROMs, burned them onto (3) 2764 chips, inst...