nesdev.org

Thanks, all. That clears up a lot.

a subroutine would offer little (if any) gain of ROM space and would be much slower.

Are JMP statements particularly slow?

Woo, it worked! Sort of. The second time it looped infinitely for some reason and started storing garbage, so I'll have to work that out. :) or should I be using jumping to a "subroutine" instead? In my opinion it makes more sense to have a subroutine that writes strings rather than a macr...

Thanks, that assembled. Now to see if it actually does anything remotely similar to what I think it's supposed to do.

I preferred the BSD license over GNU, but now I think I have a new favorite.

Coming back to this (I've got a few other projects sucking up big chunks of my time), I think I've come up with something very slightly less terrible. :P Labels are constants? (like #define?) It makes sense, but for some reason it hadn't occurred to me before. I keep wanting to translate this into s...

Yeah, those are just some meaningless addresses just so I have someplace to put things.

EDIT:
Actually, the first one isn't even used anymore.

Thanks, Grumskiz. I've read the first few NN tutorials so far and they seem helpful. :) Can I get you guys to look at this example for looping through strings? *= $1000 stLength = $2000 ;Pointer to $2000 for length of stStore string argument initString = $F000 ;Pointer to beginning of Strings curStr...

http://home.pacbell.net/michal_k/6502.html Also downloaded the samples last night, which I somehow missed before. I understand how they make use of the terminal. Kinda. Sorta. If I'm looking at the examples for reference. :P EDIT: Ok, so is .segment a location in memory designated for specific tasks...

Cygwin works if you just need a bash shell in windows, btw.

Actually, though, I think mkdir is an alias for new-item in powershell if you have win7. And you can run cygwin in powershell! Sorry, just dig the blue screen.

Hmm, not sure what segment does at all, actually. :P I understand what say_hello does, but I don't understand why you store the numbers $21 and $CA in memory. I think I'm pretty clear on how the main loop works, wooo! So, for instance, I could say... astring .byt "This is a string!" LDA as...

tepples wrote:

Code: Select all

  .byt "Hello World"

Can you loop through this somehow to store each character in memory? I think I've got the looping syntax down ok, but I can't store a string into a,x,y (Is there a practical difference between these?) if it's larger than one character.

qbradq wrote:Holy cow, that site is like stepping back into 1994! Freakin' everything is an animated GIF, even the backgrounds!

Party in the front and the back.

No, srsly, I loved it but some things from the 90s need to stay in the 90s.

Thanks for the tip! Is FCEUX more accurate than Nestopia, I wonder? I wont be able to test anything I write on a real NES anyway; haven't had one for a looong time. I think it's broken by now, anyway. The machines, alas, are not as indestructible as the SNES. Especially when forced to deal with kids...

Right now, I'm basically stuck using the 6502 simulator writing very simple programs that don't do anything but store and add numbers at some arbitrary address. That's after several days. I figure by now it's time to ask for some help. :P That's the best way to start IMO, and I suggest you continue...