Search found 11 matches

by aodinets
Sun Nov 08, 2015 6:21 am
Forum: Reproduction
Topic: Contra J repro on Batman 2?
Replies: 47
Views: 31174

Re: Contra J repro on Batman 2?

http://forums.nesdev.com/viewtopic.php?f=9&t=3480&start=75#p120092 There is not additional sound, I don't understand why. You're using HACKED copy of Gimmick game (Suikan Pipe). That will NEVER work because Suikan Pipe has music program code disabled (music writes disrupt VRC chip operation). Maybe ...
by aodinets
Thu Oct 31, 2013 7:49 pm
Forum: NES Hardware and Flash Equipment
Topic: Connect AY-3-8910 sound chip to FME-7 board
Replies: 126
Views: 82543

Re: Connect AY-3-8910 sound chip to FME-7 board

There is not additional sound, I don't understand why. You're using HACKED copy of Gimmick game (Suikan Pipe). That will NEVER work because Suikan Pipe has music program code disabled (music writes disrupt VRC chip operation). It's a great pity... Pirate MMC1: AX52, AX5904 Pirate MMC3: AX5202P Pira...
by aodinets
Thu Oct 31, 2013 8:38 am
Forum: NES Hardware and Flash Equipment
Topic: Connect AY-3-8910 sound chip to FME-7 board
Replies: 126
Views: 82543

Re: Connect AY-3-8910 sound chip to FME-7 board

I assembled and tested Gimmick! cart schematic with YMZ284 and 74ls00.
There is not additional sound, I don't understand why.
Image

http://www.youtube.com/watch?v=1Hyif8gp ... e=youtu.be
by aodinets
Thu Oct 10, 2013 11:18 pm
Forum: NES Hardware and Flash Equipment
Topic: Connect AY-3-8910 sound chip to FME-7 board
Replies: 126
Views: 82543

Re: Connect AY-3-8910 sound chip to FME-7 board

yxkalle wrote:
aodinets wrote: yxkalle
How about this fix (attached)?
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Why I don't want the divide-by-2 on the YMZ parts? I don't understand. :(
Yes, that's exactly like how I would do it myself using 74xx00's. :)
How about 74HC00-based amplifier like original famicom?
by aodinets
Tue Oct 08, 2013 6:30 pm
Forum: NES Hardware and Flash Equipment
Topic: Connect AY-3-8910 sound chip to FME-7 board
Replies: 126
Views: 82543

Re: Connect AY-3-8910 sound chip to FME-7 board

I think the logic is wrong? He's got R/W -> /WR, that's fine, but he's also got NAND2(/ROMSEL,A14)->/CE, which I think should decode on writes to $4000-$7FFF, not $C000-$FFFF. Fortunately, he's got plenty of free NAND gates to re-invert /ROMSEL. Also, as (I think) everyone else said, you don't want...
by aodinets
Mon Oct 07, 2013 9:17 am
Forum: NES Hardware and Flash Equipment
Topic: Connect AY-3-8910 sound chip to FME-7 board
Replies: 126
Views: 82543

Re: Connect AY-3-8910 sound chip to FME-7 board

l_oliveira wrote:Lacks an amplifier. Even if the logic is fine the sound will be too low on volume.
Amplifier is not a problem. Logic is important...
by aodinets
Sun Sep 29, 2013 6:35 am
Forum: NES Hardware and Flash Equipment
Topic: Connect AY-3-8910 sound chip to FME-7 board
Replies: 126
Views: 82543

Re: Connect AY-3-8910 sound chip to FME-7 board

Yes, I did exactly that and it works. Interestingly, R/W doesn't really work on this chip and it is not possible to read it, so there will never be bus conflicts with reads with this chip. Beware: the output is quite weak and is only able to source current; it can't sink current. Hi, all! What do y...
by aodinets
Wed Oct 10, 2012 3:28 pm
Forum: NES Hardware and Flash Equipment
Topic: Famicom/Dendy SRAM cartrige
Replies: 137
Views: 101080

Re: Famicom/Dendy SRAM cartrige

Gtreat job, man!
by aodinets
Sun Apr 15, 2012 8:06 pm
Forum: NES Hardware and Flash Equipment
Topic: Famicom/Dendy SRAM cartrige
Replies: 137
Views: 101080

B00daW wrote:Couldn't register on the forum. Said my gmail email address was banned for some reason.
B00daW, I reported the problem to the site administrator. Thx!
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Try to register again.
by aodinets
Sat Mar 31, 2012 6:42 pm
Forum: NES Hardware and Flash Equipment
Topic: Famicom/Dendy SRAM cartrige
Replies: 137
Views: 101080

great!