Search found 98 matches

by kingshriek
Mon Aug 27, 2007 7:15 pm
Forum: NESdev
Topic: Mandelbrot / Fractals in 6502?
Replies: 11
Views: 5912

Julia sets and Mandelbrot sets are calculated with the same recurrence relation

z[n+1] = z[n]^2 + c

For the Mandlebrot set, z[0] = 0 and c varies over the entire complex plane.

For Julia sets, a specific complex value c is selected, and z[0] varies over the entire complex plane.
by kingshriek
Sat Jul 28, 2007 10:53 pm
Forum: NES Music
Topic: More NSF Requests
Replies: 3047
Views: 1137134

I did a GBS rip for Mental Respirator awhile ago. As for Pokemon Gold/Silver, there is no GBS in existence that I'm aware of, but I did do a rip of Pokemon Crystal (under the assumption that its music is a superset of what's in Gold/Silver). Both rips are available at the GBS Penultimate Archive (ch...
by kingshriek
Sun Mar 11, 2007 1:58 am
Forum: NESdev
Topic: Multiplication Routine Lengths
Replies: 15
Views: 6500

Now make a lookup table for x^2/2, and you can multiply 8-bit numbers using one addition, three table lookups, and two subtractions. You can get by with one less table lookup by using the identity (a+b)^2 - (a-b)^2 = 4ab (thus, lookup table for x^2/4). Also, either both (a+b)^2 and (a-b)^2 will be ...
by kingshriek
Sat Feb 24, 2007 8:39 pm
Forum: Other Retro Dev
Topic: HES Rips (PC-Engine)
Replies: 38
Views: 39439

I've figured out the reason for the sound discrepancy. In the sequence data for track #$22, the FM data index is set to 03, but this index gives $FF00 as the FM pointer, so the game is pulling FM data from bank 0 of the system card. Checking $FF00 there gives a whole bunch of #$FFs. But in the HES, ...
by kingshriek
Sat Feb 24, 2007 4:55 am
Forum: Other Retro Dev
Topic: HES Rips (PC-Engine)
Replies: 38
Views: 39439

Sounds okay to me - I'm not detecting any difference in speed between the two (for the few tracks I've sampled at least). Is the problem isolated to a few specific tracks or is it global in scope? Also, are you comparing the two with the same player, because some HES players (particulary NEZplug) ca...
by kingshriek
Fri Feb 09, 2007 7:29 pm
Forum: NES Music
Topic: More NSF Requests
Replies: 3047
Views: 1137134

http://h1.ripway.com/kingshriek/BuzzandWaldog.zip

It looks like DPCM samples haven't been put in, so the game uses 6502 code in their place.
by kingshriek
Tue Dec 05, 2006 8:23 pm
Forum: NES Music
Topic: NES sound logging... possible?
Replies: 27
Views: 13810

85cocoa wrote:Not perfectly on topic, but has there ever been a format (either ripped or logged) for music from MSX games?
KSS, a rip format.
by kingshriek
Wed Aug 09, 2006 1:10 am
Forum: NES Music
Topic: Suggest some excellent NSF and GBS files to listen to.
Replies: 37
Views: 25740

Here's five of my favorites for each category NSF: Beauty & the Beast Ferrari Grand Prix Challenge Gimmick! Kujaku Ou 2 Moryou Senki Madara GBS: Doki x Doki Sasete Furai no Shiren GB2 Motocross Maniacs 2 Shantae The Smurfs Nightmare and for the hell of it HES: Coryoon Dungeon Explorer Kaze no Denset...
by kingshriek
Mon Apr 24, 2006 12:59 am
Forum: Other Retro Dev
Topic: HES Rips (PC-Engine)
Replies: 38
Views: 39439

Yeah, the template I use for System Driver rips is set up in a very general way. It is not always the case that the game's init code is lumped together with the music data (and from my experience, this isn't common). And when the init code is separated, it is cleaner to relocate only the necessary c...
by kingshriek
Sun Apr 23, 2006 9:42 am
Forum: Other Retro Dev
Topic: HES Rips (PC-Engine)
Replies: 38
Views: 39439

Good job on the rips. I actually had no idea Cratermaze was based of a Doraemon game (hadn't played Meikyuu Daisakusen) based on an original arcade game. Interesting that the US got a more artistically accurate port while Japan got a license makeover. Regarding Dungeon Explorer II, I forgot that the...
by kingshriek
Fri Apr 21, 2006 6:26 pm
Forum: GBDev
Topic: GBS Request
Replies: 352
Views: 226888

More on the HES format: PCE ROM compatibility - Just about all HES files out there have a segment of code located at $FF00-$FFFF included so that the rip becomes functional as a PCE ROM (using I and II to select songs). So when you make a rip, just copy this section from another rip into the same pl...
by kingshriek
Wed Apr 19, 2006 8:11 pm
Forum: GBDev
Topic: GBS Request
Replies: 352
Views: 226888

Yes, I ripped all the HES files on my page. I wouldn't be surprised at all if some are duplicates of what has been done the Japanese ripping community, though. I wouldn't know, given how the Japanese ripping scene consists of posting links to low-retention upload sites on 2ch (also low-retention). I...
by kingshriek
Mon Apr 17, 2006 10:33 pm
Forum: General Stuff
Topic: Can't i ever convert this track of That GB GAME?!?!?
Replies: 1
Views: 2732

I don't know of any GBS->MIDI programs. I had an idea to convert the music to an NSF since the music formats used by Spanky's Quest and Shatterhand are nearly identical. So, I took the song data for the ending music in Spanky's Quest, replaced the first track in the Shatterhand NSF with it, and manu...
by kingshriek
Wed Apr 12, 2006 3:30 am
Forum: NES Music
Topic: More NSF Requests
Replies: 3047
Views: 1137134

Damn, that Ninja Gaiden rip has been through alot! 6+ years and at least 3 contributors before a (hopefully) complete rip. And sadly, none of this is due to anything tricky with the rip - everything's due to missing song numbers in the rip's song table.