nesdev.org

There were actually nearly 10 Go games released on the Famicom. This is one of them. Don't know about their AI (some of these games probably just replayed famous games instead of having AI of their own) but I think they're limited. You may first take a look to see what could be expected and try to ...

I've been looking into Computer Go lately, and thought it would be a fun challenge to try and implement it on the NES. Graphics-wise, this works perfectly because 3 colors - tan, black, and white - can represent the wood of the board, the lines of the board, and the black and white stones. And since...

The main loop should come before but yes, everything else should come after NMI since they're all subroutines.

I don't see anything with your nametable code that wouldn't make it work. Where are you putting it now?

Not at a computer currently, but here's off the top of my head how I handle game states. My NMI is currently the same for each state, so I don't have to worry about that. I have 2 variables, gamestate and gamestatold. Each frame, I compare these two variables, and if they're different, I use the new...

Part of it is, I want the player to be able to exit the room vertically, but only at certain spots. Rather than having vertical exits have a specific address of where to go like the pipes in SMB (I already have an idea with something like this anyway, only with teleportation platforms. Some are 1-wa...

Been working on the clouds a little more. newclouds.png I think they have a little more depth now and look puffier, but they still seem kinda stiff. Any suggestions? I guess too if they're at the top of the screen, the top half won't even be visible, I may keep tweaking them a bit. I also fixed the ...

I'm more concerned right now with how the actual tiles/color choices look, than how the level is put together. The levels are really just mockups, but if level design is really that integral to critique on the tileset, I'll make a new map.

So this is the first time I've ever actually put any form of effort into making graphics. All I really have that's presentable right now are some maps, and I think they're pretty good, but it seems like a lot more is expected in terms of graphics since the NES's commercial era, so I'd like to hear o...

Yeah that does make more sense, never really thought much of why it would be like thatm

You can gan go 129 bytes forward and 126 bytes backward. It should be -127 - 128 but for whatever reason the people who designed the 6502 fucked up with the microcode. I believe this is also responsible why the address pushed onto the stack when jumping to a subroutine is off by 1.

I'll leave the memory map questions to others (not hard to explain, just don't have the energy), and I'll answer this one: 3. I diassambled the battle city, and i see this insruction: 01: $874A LDA #$35 @ $879B (just illustration!) 00:876B:20 DD D6 JSR $D6DD 00:876E:AE 09 01 LDX $0109 = #$00 00:877...

Second, where exactly does the stack store its information? Is defining a stack pointer necessary? The stack is at $0100-$01FF. You can technically write to it normally using sta $0100 , and this is actually done often because there's hardly a chance you're ever going to be deep in 256 subroutines,...

The first thing that immediately sticks out to me is that you aren't backing up your registers in your NMI, so the accumulator is getting clobbered when you return back to your main code. This might not be the problem if your code is so short, but see if this helps: NMI: pha txa pha tya pha ;nmi cod...

Now my question. How do I get sprite disappear from the screen? For example, when shooting touch the box, these two items disappear. How do I delete them?

Knowing how to program an object system is fundamental to any platform, including the nes, as was graciously explained to me a while back.

EjectY = (CollisionY AND $0f) + 1 That works perfectly. :) I'll probably just re-write my jumping code rather than trying to inject subpixels and gravity when falling into it. I'll get back after that. EDIT: This actually wasn't as difficult as I thought it would be. The player can now jump, fall, ...