Search found 26 matches

by johannesmutlu
Wed Oct 25, 2017 5:59 pm
Forum: NESdev China
Topic: Castlevania III MMC3 hack
Replies: 18
Views: 43582

Re: Castlevania III MMC3 hack

So, is this possible?, do we have a CV3 in MMC3 mapper, that would become really nice for a multicart.. Yeah i was alway's wondering how Castlevania 3 would run on a mmc3 chip ,as i don’t i just don’t think that this game will take much benefit from the mmc5 chip ,other then using bankswitching in ...
by johannesmutlu
Sun Jan 08, 2017 1:09 pm
Forum: Homebrew Projects
Topic: [NES] Ramses Game
Replies: 13
Views: 8666

Re: [NES] Ramses Game

Ramses Game is my NES homebrew. Story Ramses (the hero) was kidnapped from his home by space pirates and sold at a slave auction in the Artajian system to a cruel master named Bonehammer. Now he finds himself on a monster-infested planet, trapped in a strange prison with a bomb strapped to his ches...
by johannesmutlu
Wed May 04, 2016 9:12 am
Forum: NESdev
Topic: Parallax scrolling
Replies: 31
Views: 6651

Re: Parallax scrolling

To me it sounds logical that a mask ROM, which is a custom part, would cost more than an off the shelf part, but I can't back this up. There's also the fact that by using CHR-RAM you can save some money on the mapper, because CHR-RAM is versatile by nature, while CHR-ROM needs fine bankswitching (w...
by johannesmutlu
Wed May 04, 2016 8:56 am
Forum: NESemdev
Topic: NES emulator on Game Boy Color?
Replies: 10
Views: 9149

Re: NES emulator on Game Boy Color?

I stumbled across some Game Boy Color ROMs the other day I remember seeing ages ago, and I'm glad I did. The ROM titles are: NES Conversion - Donkey Kong [C].gbc NES Conversion - Donkey Kong 3 [C].gbc NES Conversion - Duck Hunt [C].gbc NES Conversion - Hogan's Alley [C].gbc NES Conversion - Mario B...
by johannesmutlu
Wed May 04, 2016 8:07 am
Forum: SNESdev
Topic: 16-bit stereo 32 kHz streaming success
Replies: 38
Views: 18136

Re: 15 or 16bit audio???

I noticed that the DSP configuration I used wasn't as loud as it could be, and thus wasn't using the full DAC precision. Here's an updated one: blargg_near_cd_quality2.7z ( mirror ). I've also updated the link in the original message. Before I had a single FIR constant of $3F (49%) and evol of $7F ...
by johannesmutlu
Wed Oct 28, 2015 12:01 am
Forum: NESdev
Topic: Actual NES/FAMICON/FAMICLONE framerate?
Replies: 15
Views: 20717


It's progressive in the sense that it's not interlaced. Most (all?) NTSC TVs determine whether a field is even or odd by counting the scanlines of the previous field. If you output fields that all have the same number of scanlines, you trick the TV into becoming a non-interlaced 60 frames-per-secon...
by johannesmutlu
Sun Nov 18, 2012 2:53 pm
Forum: NES Music
Topic: NES's noise channel
Replies: 4
Views: 5992


Wow I didn't think it would be that long. Well the obvious difference between the noise channel and white noise is that white noise has random amplitudes for the wave, but the NES noise channel is just a 1-bit amplitude. speaking about the nes noise channel i have discovered that the noise channel ...
by johannesmutlu
Sun Jul 08, 2012 7:16 am
Forum: SNESdev
Topic: Nes to SNES adapter
Replies: 7
Views: 2500

1 it,s possible to stick the nes hardware inside an large snes cartride and then send the nes digital video output to the snes frambuffer,will the nes audio once converted toanalogue just can be sent to the snes ext soundpins and then mixed with the dsp analogue output. 2 it,s possinle to put 2 conv...
by johannesmutlu
Sun Jul 08, 2012 6:59 am
Forum: GBDev
Topic: Gameboy Color Colorized Games
Replies: 5
Views: 9038

according to wikipedia 89 gameboy games are supported by the gameboycolor to have their own colorpallet,games wich are not supported will have the colorpallet in default mode red green. :D also the gameboycolor has 12 color pallets to chose from,but i wish nintendo had added 48 color pallets to it,b...
by johannesmutlu
Wed Dec 28, 2011 10:08 am
Forum: NES Hardware and Flash Equipment
Topic: PowerPak save state mappers
Replies: 63
Views: 29256

i finaly know how to get save state to work but the way to do that is pretty weird. after unzipping the mapper in the cd flashcard directory,you got to go to the savestate mapper and then copy those maps map00 mapp01 map02 etc,, to the powerpak mappers,and you must replace the map00,map01 etc,,,insi...
by johannesmutlu
Wed Dec 28, 2011 9:41 am
Forum: NESemdev
Topic: NES PAL timing vs NSTC timing and in general
Replies: 3
Views: 2064

no doubt that the timing between the pal and ntsc nes systems are different,wich explaines wich some pal,ntsc games,do,nt work on each other,even not with a clunky convertor,like the pirate version of superdonkeykong2(wich i run on the powerpak),it works on a ntsc nes,but not on a pal nes,all i get ...
by johannesmutlu
Wed Dec 28, 2011 9:36 am
Forum: NESdev
Topic: ethernet for the NES
Replies: 9
Views: 4403

there was a famicom modem wich allowed you to down load games,doing quiz games,or getting info about the wheater,news etc,,,
and you can even play multi player games online.trough it was an opscure unit wich required a phone line.
by johannesmutlu
Sun Dec 18, 2011 6:10 am
Forum: NES Hardware and Flash Equipment
Topic: Current Problem PowerPak Games
Replies: 167
Views: 110064

Crystalis seems to have some graphical issues as well. Yes, I can observe a small amount of tile garbage here and there when walking on the map outside the first town. this is really confusing me either,wich games are compatible and wich games are not/yes compatible. sadly retrousb has no clear lis...
by johannesmutlu
Sun Dec 18, 2011 5:57 am
Forum: NES Hardware and Flash Equipment
Topic: powerpak keeps loading
Replies: 11
Views: 2909

Are you pressing Start to load the game or pressing A to load the game? A lot of the PowerPak menu uses Start as the back button. powerpak is turned on and i press left to get this list. // powerpak //macosx pong.nes battlekid.nes i go to 1 of the nes roms(that work on emulator) when i press select...
by johannesmutlu
Fri Dec 16, 2011 3:00 am
Forum: NES Hardware and Flash Equipment
Topic: PowerPak save state mappers
Replies: 63
Views: 29256

I've now implemented AxROM, CNROM and MMC1, just need to polish them a bit before releasing. MMC3 is also partially working but the scanline counter is giving me some trouble. the savestate mapper for the powerpak is really nice cuzz now i can start at any point i want,however my miner complain abo...