nesdev.org

My c NES library work in progress:



Yes, I know it looks a little bit gay , but I was just testing sprite DMA with random values and the rainbow colors popped out

Bregalad wrote:I'm pretty sure it should be possible to reassemble the CC65 NES libraries so that it uses either adress you desire.

Yeah, it should. I'll investigate.

Well, I don't just want to understand how the NES works, yes that's the main reason, but actually I want to be able to compile and run the emulator and try to make some changes to its source and see them running.
I've seen really cryptic code in many open source projects.

Thanks, I'll give it a try!

Hi, I'd like to make some tools to debug and reverse-engineer the NES. So I don't want to have a hard time trying to understand and even compile a complex emulator. So in your experience, what emulator would you think is the easiest one to have a look at its source, understand it and compile it with...

Hi, I wrote a simple program to see what addresses did each variable get. And I got this result: - Global variables get stored starting from address $6000. ( That should be Save RAM, and indeed, emulators save .sav files whenever you use global variables ) - Local variables get addresses $07FF and g...

UncleSporky wrote:it does make him seem constantly annoyed.

You're right, that's maybe what annoys me.
Maybe in my subconscious I think tepples is always bothered by something, like Pinnochio seems to be

tepples wrote:

UncleSporky wrote:What's that kid from?

Pinocchio 2

Does the name "Pin Eight" have to do with that?
Because in spanish Pin 8 would be "Pin ocho" the same as Pinocchio.

In [url=http://nesdev.com/bbs/viewtopic.php?p=41472#41472]this post[/url], Bregalad wrote:Hmmh, your avatar is much weirder too (altough it doesn't annoy me). A face viewed by front and face at the same time is really weird.

Tepples' avatar is not weird at all, it just annoys me, I'm not sure why.

Hi, is it possible to meassure time in the NES other than waiting for VBLANK? The best answer depends on your answer to the following: Of what event are you trying to measure the time? I want to make a metronome. But maybe 60 hz are enough. PS: Tepples, don't take it personal, but your avatar annoy...

Hi, is it possible to meassure time in the NES other than waiting for VBLANK?
This gives a precision of a 60th of a second, in NTSC, but what if you want more precision? is it possible?

You're right, I was just naming which functions should be included in a NES library, some of them written in assembler, some in c, doesn't matter.

Pretty much. CC65 allows assembly and C routines to call eachother (in theory, I haven't tried). Totally. I have. As long as you have the object file ( .o ) and the API definition ( .h for C or .inc for assembler ) it doesn't matter in which language it was written, you can use it from both languag...

Thanks!
So, it's reading the sample info from some binary data right?
How were that samples generated?

I think the best would be having a library written in assembler with time-critical routines, and have the c header files to use that routines, and make the application body in C.

Matrixz and/or Blargg: could you explain the code for the sound effects? it would help me a lot to understand how to make this kind of sounds. ( I just experimented with rectangular wave channels ) Thanks! ( great demo, by the way, matrixz ) shoot_sound: lda #$01 sta $400C lda <random+3 and #$03 sta...