Search found 1330 matches

by Drag
Sun Jan 24, 2021 12:30 am
Forum: NESdev
Topic: Was there an NES expansion chip like SA-1
Replies: 85
Views: 14469

Re: Was there an NES expansion chip like SA-1

I'd say a complex FM chip is something that takes enough time to process a routine for that it starts to become noticeable in your overall cycle-budget. I've heard that in Compile's original Aleste/Power Strike for the SMS, players can choose whether FM tunes are used, as the slowdowns are so sever...
by Drag
Fri Jan 22, 2021 5:00 pm
Forum: NESdev
Topic: Was there an NES expansion chip like SA-1
Replies: 85
Views: 14469

Re: Was there an NES expansion chip like SA-1

I would say to figure out what your software needs to do, and if it would benefit from extra hardware on the cart, and if there isn't already something that can provide you what you need. Like, the vast overarching majority of the stuff we churn out here as homebrewers is perfectly fine with the dis...
by Drag
Thu Jan 21, 2021 10:39 pm
Forum: NESdev
Topic: Was there an NES expansion chip like SA-1
Replies: 85
Views: 14469

Re: Was there an NES expansion chip like SA-1

Just as a quick exercise, what would it take to add a second, faster-clocked 6502 on the cart, and what would the benefits be? Well first, the coprocessor will need its own memory to hold its program and variables, and the simplest way to do that would be to connect the WRAM to it. If you do that, t...
by Drag
Sun Dec 06, 2020 8:05 pm
Forum: Newbie Help Center
Topic: Question about collision detection with other objects
Replies: 17
Views: 6053

Re: Question about collision detection with other objects

I'm kinda late to the party, but here's how I've done actor vs. actor collision detection: Take "A", calculate A's top-left and bottom-right hitbox coordinates, store each X and Y coordinate as A.top, A.bottom, A.left, and A.right. Take "B", do the same thing. If A.left > B.right, exit. If A.right <...
by Drag
Fri Dec 04, 2020 10:33 pm
Forum: Newbie Help Center
Topic: The problem when writing 0 to $C000 in the real MMC3
Replies: 12
Views: 3690

Re: The problem when writing 0 to $C000 in the real MMC3

Nice! We should probably add this quirk to the wiki, since we now have a documented case of someone encountering it accidentally. :P
by Drag
Thu Dec 03, 2020 1:06 pm
Forum: Newbie Help Center
Topic: The problem when writing 0 to $C000 in the real MMC3
Replies: 12
Views: 3690

Re: The problem when writing 0 to $C000 in the real MMC3

You're right, that should be a "new revision" MMC3. The code looks OK, so I'm not sure what's happening.
by Drag
Wed Dec 02, 2020 5:09 pm
Forum: Newbie Help Center
Topic: The problem when writing 0 to $C000 in the real MMC3
Replies: 12
Views: 3690

Re: The problem when writing 0 to $C000 in the real MMC3

There are two revisions of the MMC3: Old revision = Write #$00 to $C000, IRQ is only once. New revision = Write #$00 to $C000, IRQ is every scanline. It sounds like the real MMC3B chip you're using is an "old revision" chip. Here's the wiki page on it , it also says how to identify which MMC3B chip ...
by Drag
Wed Dec 02, 2020 3:56 pm
Forum: NES Music
Topic: More NSF Requests
Replies: 3087
Views: 1263498

Re: More NSF Requests

Attached is an updated Seirei Gari with one missing song and two missing jingles added back in.

(Also, there doesn't seem to be a way to include attachment filenames in a thread search, so I have no idea if this fix has already been done)
by Drag
Sat Oct 24, 2020 10:35 am
Forum: NESdev
Topic: Nintendo's Advanced Video System
Replies: 10
Views: 8645

Re: Nintendo's Advanced Video System

Sweet! Happy to have a reference of these.
by Drag
Mon Oct 05, 2020 6:41 pm
Forum: Web Issues
Topic: Sometimes can't access nesdev.com
Replies: 9
Views: 8321

Re: Sometimes can't access nesdev.com

Try isup.me next time to be sure. It's explained more in depth in the linked thread, but RCWN completely subverts the browser's cache by re-requesting all content, on the off chance that re-receiving it from the server is faster than retrieving it from the cache. Nesdev is likely seeing this as a DO...
by Drag
Sun Sep 27, 2020 2:43 pm
Forum: NES Music
Topic: More NSF Requests
Replies: 3087
Views: 1263498

Re: More NSF Requests

Oh snap. Is there any way to get these fixed files into circulation or do we have to just hope someone notices?
by Drag
Sat Sep 26, 2020 8:51 pm
Forum: Web Issues
Topic: Sometimes can't access nesdev.com
Replies: 9
Views: 8321

Re: Sometimes can't access nesdev.com

Are you using Firefox? Tepples identified an issue with the site and RCWN: http://forums.nesdev.com/viewtopic.php?p=247736#p247736 The short of it is, go to about:config, find (or make) the key network.http.rcwn.enabled and set it to false . This was affecting me too and I can confirm that this fixe...
by Drag
Sat Sep 26, 2020 2:38 am
Forum: NES Music
Topic: More NSF Requests
Replies: 3087
Views: 1263498

Re: More NSF Requests

In the NSF of Heisei Tensai Bakabon currently in circulation, track 3 is missing the triangle channel. Attached is a patched version of the NSF to fix this issue. It looks like there was a mistake, for this track only, the music data does not contain a command to set the patch for the triangle chann...
by Drag
Fri Sep 04, 2020 9:21 pm
Forum: phpBB Issues
Topic: The [code] tag should not have its height limited
Replies: 10
Views: 5593

Re: The [code] tag should not have its height limited

I think it requires touching a file on the server, no matter what.
by Drag
Fri Sep 04, 2020 2:49 pm
Forum: phpBB Issues
Topic: The [code] tag should not have its height limited
Replies: 10
Views: 5593

Re: The [code] tag should not have its height limited

Oh snap, I didn't see that there were already two threads on the matter. :P

Well, here's thread #3 I suppose.