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Yeah, as an internal format for an effects editor or something like that it's fine. I just wouldn't want to log an entire Genesis song where it plays samples by pushing the data through a port on the YM2612 that way smile

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Yeah

For YM2612, I probably would use references to external binary files. wouldnt make sense to push each and every byte.

However for c64 digis, my approach still has values, if you record things like early speech games (impossible mission, ghostbusters), you realise that the _timing_ between each volume register write is crucial to the sound, and it varies a lot.

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BTW,

here are two MD5's for some of my SCV carts :

Astro Wars - Invaders from Space.rom 5c0a8b9e0ae3bdc62cf758c8de3c621c

Wheelie Racer.rom ef4ab0300b9e056d1ba9873b63a1b6cf
(i think you guys have this one already.. hows the md5 match?)

I also have "Nebula" but its on a upD23128AC and i cant dump in with any trick i've tried.

Last edited by plgDavid; 08/02/09 02:36 PM.
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Originally Posted By plgDavid
BTW,

here are two MD5's for some of my SCV carts :

Astro Wars - Invaders from Space.rom 5c0a8b9e0ae3bdc62cf758c8de3c621c

Wheelie Racer.rom ef4ab0300b9e056d1ba9873b63a1b6cf
(i think you guys have this one already.. hows the md5 match?)


I also have "Nebula" but its on a upD23128AC and i cant dump in with any trick i've tried.


My version is different.
[MD5] c6a2d7b69be41d1de936c7643527f842 [CRC32] 04860245
Not sure I have a bad or good dump. Also not know, any different exist between YENO or EPOCH Super Cassette Vision cartridges.
Can not check, because of the missing hardware or bios rom (for the eSCV emulator).

Last edited by Anna Wu; 08/02/09 06:32 PM.
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Yeah. Which is why for playback purposes emulated formats (xSF/SID) work better - you get the timing "for free" if you build the player reasonably carefully. But I wouldn't want to try and edit sounds/songs that way smile

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Originally Posted By plgDavid
First time here. Im the author of the chipsounds blog. Coincidence indeed lol. Thanks for the upD7801 datasheet!!! That is REALLY welcome. (too bad i didnt have it a week ago lol).


I'm not sure ANYONE had it, other than Takeda Toshida and partners maybe, scanned in PDF form until yesterday. smile
I like tracking down and digitizing datasheets. Ingo Sangmeister at http://www.ic-ts-histo.de is a really great guy and has the largest private collection of data books I've ever seen, even more than Al Kossow of http://www.bitsavers.org. He's been very helpful over the past few years when websites like DatasheetArchive.com don't have what you need. You just have to be patient and not flood him with requests. The Software Preservation Society (http://www.softpres.org) has also required his help in obtaining obscure floppy-drive-related datasheets. (I wonder what they are, maybe MESS will need them too at some point)

Originally Posted By plgDavid
the XML format for chip data is not meant as an "end all" compressed format. I mostly use it to manually create/test lists of register writes and to make snapshot of discreet sound blurps like Special Effects and the likes. Common set of C++ tools to play with it etc...


I think R. Belmont's just concerned about whether he needs to try to support another chiptunes format in Audio Overload.
http://en.wikipedia.org/wiki/Audio_Overload wink

I can get a datasheet for the uPD23128AC if you want. smile

Last edited by Stiletto; 08/02/09 03:34 PM.
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Originally Posted By R. Belmont
But I wouldn't want to try and edit sounds/songs that way smile


Exactly, and that's mostly my goal. Also to analyze fast register writing tricks (wavetables, oscillator resetting tricks, etc), its much easier with a list of writes, imho.

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plgDavid: btw on your page you mention that the sn76489A and the sn94624 chip used on the ti 99/4a have different whitenoise streams. I know the sn76489 and the sn76489A have different streams because the non-a part has a one-stage-shorter shift register (15 instead of 16 stages) and hence even with the xor-tap-movement magic the ti engineers did, it has one extra bit at the very beginning of the stream.
But you implied the sn94624 is different from the sn76489A beyond just the one bit difference? If the stream really is different, what are the xor taps of the sn94624? do they match the sega PSG/sn76489 clone or are the completely different from anything we have so far?

Just curious.

LN

P.S. does the sn94624 have a completely different clock divider to the sn76489A, i.e. it divides by 4 instead of by 32 or so? the sn76489a datasheet implied this but i'm not sure its true. TI LOVED to have multiple part numbers for the same chip and to make subtle but visible behavior changes without changing part numbers...


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Originally Posted By Anna Wu
Originally Posted By plgDavid
BTW,

here are two MD5's for some of my SCV carts :

Astro Wars - Invaders from Space.rom 5c0a8b9e0ae3bdc62cf758c8de3c621c

Wheelie Racer.rom ef4ab0300b9e056d1ba9873b63a1b6cf
(i think you guys have this one already.. hows the md5 match?)


I also have "Nebula" but its on a upD23128AC and i cant dump in with any trick i've tried.


My version is different.
[MD5] c6a2d7b69be41d1de936c7643527f842 [CRC32] 04860245
Not sure I have a bad or good dump. Also not know, any different exist between YENO or EPOCH Super Cassette Vision cartridges.
Can not check, because of the missing hardware or bios rom (for the eSCV emulator).


OK, I modified my cart dump.

[MD5] ef4ab0300b9e056d1ba9873b63a1b6cf
[CRC32] 9d9b29db

Thanks David !

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It's certainly plausible that the Wheelie Racer ROM's would be different, since I sent Guru the Japanese version and plgDavid dumped the European version, I presume.

Now, Guru also has the Japanese system and seven more games: Elevator Fight, Super Golf, Punch Boy, Nebula, Super Soccer, Battle in Galaxy, and Super Baseball.


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