2A03 vs 2A07

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Sky Yoshi
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2A03 vs 2A07

Postby Sky Yoshi » Mon Nov 30, 2015 12:25 pm

What is the differences of 2A03 and 2A07?
I really want to know that.
Also what are these Expansion chip does?
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Last edited by Sky Yoshi on Mon Nov 30, 2015 12:30 pm, edited 1 time in total.
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Dr. Merio
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Re: 2A03 vs 2A07

Postby Dr. Merio » Mon Nov 30, 2015 12:28 pm

2A03 is NTSC (that's for America and Japan afaik), while 2A07 is PAL (for Europe and other PAL countries). The 2A03 runs at ~60.09 Hz (faster than 2A07) while the 2A07 runs at 50 Hz (slower than 2A03). I think both chips have different sound frecuencies they can play too but I don't know the details. :P
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Sky Yoshi
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Re: 2A03 vs 2A07

Postby Sky Yoshi » Mon Nov 30, 2015 12:32 pm

Thank you for the details!
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ollaxe
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Re: 2A03 vs 2A07

Postby ollaxe » Mon Nov 30, 2015 6:01 pm

Dr. Merio wrote:I think both chips have different sound frecuencies they can play too but I don't know the details. :P


Yeah, if you play the same NSF on a 2A07 and on an 2A03, the 2A07 will be pitched lower. This also means that the 2A07 can reach lower notes than the 2A03 (especially noticable on the squarewave ones).
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Re: 2A03 vs 2A07

Postby Xyz » Mon Nov 30, 2015 7:34 pm

As for the other two chips you mentioned, they are ADPCM chips containing fixed samples from their games. They may be included in the .nsf specification in the future but for the meantime it is unsupported.
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Sky Yoshi
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Re: 2A03 vs 2A07

Postby Sky Yoshi » Mon Nov 30, 2015 10:24 pm

Wow! so many Replies!
Thank you for many infomations!
Also what are these Expansion chip does?
NEC µPD7756C & Mitsubishi M50805
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NicolasMaeder
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Re: 2A03 vs 2A07

Postby NicolasMaeder » Tue Dec 01, 2015 10:19 pm

Both chips were developed by Ricoh, an imaging/electronics company. Fact. :)
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