nesdev.org

Assembler-wise, I think I'll stick with asm6. ca65 and wla-dx are tied for a second, and nesasm takes the spot for last. With nesasm, it's nice that someone made a better version on their own, but I'm not into the idea of having to say "make sure you use the version from THIS PERSON, not the ST...

koitsu wrote:Throwing in my two cents: charmap in ca65 is stupid and badly-implemented. Compare its ridiculousness to how x816 implemented it (see .ASCTABLE and .ASC).

That's exactly how WLA goes about it, something that I've always loved.

Just one more thing about the startup code. I think what you've got probably works, but for good practice you should add one extra read of $2002 before your 2 vblank loops, or alternatively just do 3 vblank loops. The reasons are outlined here: http://forums.nesdev.com/viewtopic.php?f=2&t=3958 ...

Thanks Movax, I was able to set that up accordingly. The multi-line thing didn't work though... Anyway 0.3 is up (updates so fast I'm like Ville Helin XD). Fixed the NESASM example (forgot to remove the part enabling sprites,) added the charmap to the ca65 example and changed how the print screen fu...

What are the directives to remap characters though? The relevant control command is .charmap You can find all this stuff in the documentation: http://www.cc65.org/doc/ca65.html (You might look at the entry for .byte to see an example for using strings, too.) I tried to set A-Z to their specific cha...

Espozo wrote:

nicklausw wrote:Like I said, that can be fixed by adding a ".w" but it looks ugly and shouldn't be necessary.

Nobody told me that...

Wait, seriously? People around here don't seem to have ANY idea how to use WLA. Perhaps it needs some better examples?

I just had a big fiasco where it decided to use 8 bit addressing instead of 16 bit and it screwed me over, so I vowed never to use it again. I thought I was going crazy because I kept looking over the code I made and the SNES kept crashing, but it wasn't actually my fault. Like I said, that can be ...

So recently I got bored with the good ol' Sega 8 bit systems, and decided to try out the NES. When first walking in, there was an unfortunately debatable topic: which assembler to use. So I not only created a hello world for one assembler, I made one for them all. By 'all' I mean asm6, ca65, nesasm ...

Wait, are they trying to compare processor power by speed and RAM? Uh. Sounds like a terrible idea. Like, from what I've seen, the Z80 is good with 16-bit calculation because its 8-bit registers can be combined to create 16 bits. The 6502 doesn't seem to have this capability, yet can probably do the...

...oh my god, it makes sense. I think.

So unlike WLA DX, .org doesn't go to a certain area in the source, it's just for address calculation? FINALLY I get it.

I'm not sure I understand the question, but ASM6 is completely unaware of NES mappers. It's your responsibility to arrange the banks and .org/.base the addresses correctly for the mapper you're using. Are you having some trouble with that? Cuz I mean, you say that the NES is mapped so that $c000 is...

tokumaru wrote: That's because the NES maps the cartridge ROM at $8000-$FFFF (the upper half of the address space), so file offsets (what the hex editor shows you) don't match 1:1 with the CPU's address space.

Okay, one more question: in this case, does asm6 have a default base targeting the NES mapper?

See, when I see ".org $c000", I expect to open up a hex editor and see the following data under $c000. It doesn't seem to work that way, though. That's because the NES maps the cartridge ROM at $8000-$FFFF (the upper half of the address space), so file offsets (what the hex editor shows y...

(I might as well start a topic under NESDev called "nicklausw's stupid questions") Uh, this might make me sound like an idiot, but I honestly can't figure out how .orgs work in asm6. See, when I see ".org $c000", I expect to open up a hex editor and see the following data under $...

Gotta say though, part of what was keeping me from the NES was the fact that I never could figure out what a CHR-ROM is. Now I know, but still, thought it was this random huge file you had to generate somehow. (Well, it's not on the SNES... CHR rom is tremendously more useful though. It's actually ...