nesdev.org

The longer slog is implementing all of the items, levels, enemies, and abilities. That's the type of thing you'll burn out on. This. I finished the core of my Zelda-like game years ago, but always get burnt out creating content. I also like building engines, so I've started a few other projects and...

The problem with that is that all these extra labels will get exported to label files along with the ones that are actually relevant for debugging. Maybe the solution is not to change ENUM, but to take a cue from ca65 and implement two forms of assignment for symbols, one that marks the symbol as a...

I would show whatever valid instruction the PC points to. In this example, LDA #$FF.

The debugger was highlighted on line $FE66, but the actual value of the PC was $FE67.

Found an issue with the debugger. Here's an example: lda var beq _is_zero _is_not_zero: lda array, X .db $2C _is_zero: lda #$FF sta v0 rts The first time it ran, 'var' was non-zero, so it went through the array access path (lda, bit, sta, rts). Later on, 'var' was zero, so it went through the consta...

Do you also do sfx?

So I finally took the time to download Mesen after fceux crashed because I tried a mmc3/chr-rom/chr-ram/wram combo. I've only briefly tried out the debugging features, but I was immediately impressed. The event viewer is really helpful and showed me that my irq fires 1 scanline early for a few frame...

I've been reading up on both topics lately and was able to make a simple client-server chat program. Now I want to take this idea and extend it to a co-op game with both local and network support. For now, I'm just going to extend my original program to allow for multiple clients to join the server ...

There is no hardware limitation on having different times for each frame of an animation. My animation code allows for this, but it does double the size of an animation definition (which isn't really a problem these days). Without bank switching or chr-ram you might run out of tiles to use on other ...

rainwarrior wrote:a 256 OAM buffer in RAM might be rebuilt every frame, which is quite a bit of temporary space available for anything that happens before you build your sprite list

I never considered this possibility. I'll have to keep this in mind if I find myself short on temporary storage.

I set aside zp variables like MIPS registers: a0 - a5 : argument registers t0 - t9 : temporary registers s0 - s5 : save registers v0 - v1 : return value registers (or more arguments) i0 - i1 : temporary registers (for interrupts) A , T , and V are assumed to be overwritten across function calls. S m...

It depends on the type of game, but I do feel a basic understanding of math and physics helps. While working on a Zelda-type game, everything was very simple and basic. On the other hand, a platformer project was a lot more complex. Some of that was by choice, such as having elastic collisions inste...

* Which of the possible configurations would be your favorite? Conventional H/V mirroring trading away CHR tiles? One-screen mirroring leaving CHR alone? Or variants on the 4-screen configuration? I'm a big fan of one-screen mirroring. I like to used nat-a for the playing field and nat-b for the st...

I added it to the FME7, but sorted cheated and used a block ram instead. Nice to see it in a more affordable package.

I'd have to double check, but I'm pretty sure I had to latch bits on the rising edge for the PowerPak.

lidnariq wrote:I assume you're also keeping the NES's internal RAM off the bus?

Turns out this was it. After adding some logic to control ciram_ce, everything started working. Thanks!

I've been trying to figure out how to put data into PPU D0.D7 but haven't had any luck. I started out by filling the attribute tables with palette 0 in software, and trying to force them all to palette 2 in hardware. For bus control I have: assign neschr_oe=neschr_rd & ({chrain[13:12],chrain[9:6...