nesdev.org

How would you use the .rs above where the code starts? It forces me to use a .org before any .rs, but this is where the simulator starts executing. I suppose I could jump over any .rs's but that seems kind of retarded. I wanted my simulated programs to look somewhat like NES roms, and have variables...

So you just hardcode the meaningless writes at the routine or whatever you're interested in, and have the breakpoint fire on a write to that location? Cool idea...thanks

Odd, I feel like I tried .rs a while ago and it didn't work for me. Guess I'll have to try it again! Thanks

I'm under the impression that pretty much all famiclones use the NES-on-a-chip technology, and I'm also under the impression that it works pretty well except for sound, where the duty cycles are swapped. I'm guessing this gives various sounds a different timbre than the original NES. Does anyone kno...

During execution of my rudimentary game engine experiments, It will always alternate between a long calculation/AI/decoding routine in the main loop and PPU updates in vblank. It seems to me if I wanted to step through the code as it is executing in an emulator, I could start by setting a breakpoint...

I assume most people here are familiar with the 6502 simulator located here http://home.pacbell.net/michal_k/6502.html ? I find it a really convenient way to verify that a routine I'm working on does what I expect it to do. I was wondering how you would reserve RAM for variables in the simulator...t...

Hey everyone, haven't been here in a while---

I just went hunting through some old stuff I had as a kid, and I found all the boxes of my NES games, as well as their manuals! (except Mega Man 5's manual, which appears to be lost ) That's exciting to me..I love nostalgia 8)

Personally I found it instructive to translate Michael Martin's NES101 tut from P65 to NESASM and then to ASM6 (using ASM6's readme). In retrospect, it may have been easier to go straight from P65 to ASM6. They share some features.

Now that you point it out, I do sometimes have to insert a game boy game or SNES game more than once to get it to work. I guess perhaps I'm being somewhat obsessive compulsive about the games "always working.." 8) Still it'd be fun to see how effective these products are...can't hurt right?

I've heard of the bending prong technique. My new 72 pin connector is still tight, that's the amusing part. It hasn't worn out yet. So you'd think bending the prongs in this case would be redundant. I've meticulously cleaned each game I own, too, including ones that have begun failing. Now by fail I...

Anyone tried Deoxit? My new 72 pin connector has begun failing already and so I'm investigating trying out either Deoxit or Stabilant 22 as I mentioned in a previous thread. Deoxit is way cheaper so I wondered if anyone has had success with it.

I've learned a bit since my OP... I have a simple MMC1 experiment working for example. This has led me to speculate more about how I will be using mappers as I develop a game engine. Is bankswitching virtually instantaneous? That is to say, could your update routine actually swap in a 16k PRG block ...

Thanks Disch! That makes perfect sense. I guess it hadn't occurred to me that .pad $FFFA goes beyond the 16k that would start at $8000. Now I think I understand why some mappers can "fix" a 16k prg block at either $8000 or $C000---this is so you can basically have 32k for game code, correc...

In Michael Martin's NES 101 tutorial, we find the following comment: "; Actual program code. We only have one PRG-ROM chip here, so the ; origin is $C000." I've been basing most of my experiments on his demo, so I've left the .org $c000 in there so far. Now that I want to learn about how t...

Well I'm glad that it can save lives because I lose quite a few of them while playing the old classics.