The switched duty bug on clones - an evidence

[HardWareMan]

Does this one have that issue?
Gold Leopard King famiclone: http://www.goear.com/listen/5e9d115/int ... lk-unknown
Original PAL NES: http://www.goear.com/listen/b7dfd64/int ... es-unknown

(on top, the original NES. On the bottom this famiclone)

Actually I prefer the "happier" sound from the Famiclone

The second chart shows a insufficiency of separating capacitance in the sound channel. It is necessary to make records directly from the output of the chip.

[TmEE]

I have seen at least 100 famiclones myself and I can also say that not a whole lot of them have wrong sound. There were not too many different "chipsets". UMC based clones were the ones with wrong sound. I got one TA-03 based clone and it is really nice except DPCM has wrong pitches (very evident in Super C orchestra hit sounds).
My fav clone is Ending-Man S-500, aka Terminator, aka Toyo, aka BS-500AS etc. etc. etc.

Here's few recordings from it (2x ~10MB FLAC)
http://www.fileden.com/files/2008/4/21/ ... tage2.flac
http://www.fileden.com/files/2008/4/21/ ... tage3.flac

It has no duty cycle bug, but its DPCM + noise + triangle are much louder than normal NES (which is a quality I like personally), DPCM pitches are right, but there is significant video noise in the sound due to it being a globtop type

[Eugene.S]

What chip goes with this clone?

T2-Stage3.flac:

20kHz, awesome.

[TmEE]

Here is 2 pictures of the PCB of the clone, it is in a wrong shell now, but it came from an Ending Man S-500 aka Terminator aka BS-500AS etc.

http://www.fileden.com/files/2008/4/21/ ... Clone0.jpg
http://www.fileden.com/files/2008/4/21/ ... Clone1.jpg

This is much older clone board that uses same chipset and is from an Ending Man S-500 also (but sadly no longer works) :
http://www.fileden.com/files/2008/4/21/ ... iginal.jpg
This board should be from 1992 or 1993

JP1 changes PAL/NTSC colorburst
JP2 changes 50/60Hz
JP3 changes clock divider for 26 or 21MHz crystal.

I wish original NES had such features haha

[krzysiobal]

Does this one have that issue?
Gold Leopard King famiclone: http://www.goear.com/listen/5e9d115/int ... lk-unknown
Original PAL NES: http://www.goear.com/listen/b7dfd64/int ... es-unknown
(on top, the original NES. On the bottom this famiclone)

Actually I prefer the "happier" sound from the Famiclone

What game does this song came from? I fell in love in that..

[socram8888]

It's from D-Pad Hero 1 or 2, I don't remember which one was.

[krzysiobal]

It's dpad-hero 2's title screen.
Thanks man!
http://www.dpadhero.com/Download.html

[Eugene.S]

UA6527P [manufactured: april 1993]:



Does it have swapped duty cycles? http://youtu.be/6AVqrOqQLfM

[Bregalad]

Yes.

[Eugene.S]

I made some records from TA-03NP1-chip (it has no duty cycles bug) on Famicom AV PCB:
Famicom 1989 PCB
Famicom AV 1993 PCB

Power Blade - Sector 3
Bucky O'Hare - Escape!
It sounds clean and nice. I've recorded it via M-Audio Revolution 5.1

Here is a recording (53MB, FLAC) of songs from Bucky O'Hare and first level of Batman.
It was done from a clone with UA6527P duty-buggy chip, with good audio output, and SB X-Fi soundcard on PC, without any additional processing.
Here is a test program and recordings (8MB) that were made with 6 different chips.

All deadlinks fixed.

[TmEE]

I got a TA-03NP1 based clone too, and it works very nicely !
Only problem is that PAL games have wrong DPCM pitches, like with NTSC CPU. Probotector II notably, it sounds very wrong on NTSC CPU and that clone CPU.
But at leas it uses divider of 15 instead of 16 like PAL CPU does so a lot of games don't slow down

The TA-03NP1 has 6527P written on it, and the mathcing PPU TA-02NP has 6538 on it. UM6527P and UM6538... ?

[Eugene.S]

Only problem is that PAL games have wrong DPCM pitches, like with NTSC CPU.

These pirate chips are designed for NTSC games (Japan, USA) and not for european PAL.

The TA-03NP1 has 6527P written on it, and the mathcing PPU TA-02NP has 6538 on it. UM6527P and UM6538... ?

viewtopic.php?p=45889#p45889

[HardWareMan]

Did you notice that TA-01 was in Atari 2600 clone, TA-02/TA-03 was in Famicom clone and TA-04/TA-05/TA-06/TA-07 was in Sega Megadrive clone? Same manufacturer?

[TmEE]

Thät's a nice notice !

[Ryukenden]

Somebody knows, what chips-clones have appeared earlier: normal or with switched duty cycle?