Ricoh 2A03: Difference between revisions
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[[File:RP2A07.jpg|thumb|right|250px|The RP2A07 PAL version.]]The '''Ricoh 2A03''', '''RP2A03''' (NTSC), '''Ricoh 2A07''', '''RP2A07''' (PAL) or '''2A03''' is the [[8-bit]] [[microprocessor]] in the [https://en.wikipedia.org/wiki/Nintendo_Entertainment_System NES], (also known as the Famicom). |
[[File:RP2A07.jpg|thumb|right|250px|The RP2A07 PAL version.]]The '''Ricoh 2A03''', '''RP2A03''' (NTSC), '''Ricoh 2A07''', '''RP2A07''' (PAL) or '''2A03''' is the [[8-bit]] [[microprocessor]] in the [https://en.wikipedia.org/wiki/Nintendo_Entertainment_System NES], (also known as the Famicom). |
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==Technical details== |
== Technical details == |
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Manufactured by [https://en.wikipedia.org/wiki/Ricoh Ricoh] and based on the [https://en.wikipedia.org/wiki/MOS_Technology_6502 MOS Technology 6502]. NTSC versions of the NES use the 2A03, which is run at 1.79 MHz. PAL versions used the 2A07 processor, which is identical to the 2A03 except that it runs at 1.66 MHz. Timing differences between NTSC & PAL versions are to ensure that the sound output is the same on either.<ref name="de">[http://problemkaputt.de/everynes.htm Everynes |
Manufactured by [https://en.wikipedia.org/wiki/Ricoh Ricoh] and based on the [https://en.wikipedia.org/wiki/MOS_Technology_6502 MOS Technology 6502]. NTSC versions of the NES use the 2A03, which is run at 1.79 MHz. PAL versions used the 2A07 processor, which is identical to the 2A03 except that it runs at 1.66 MHz. Timing differences between NTSC & PAL versions are to ensure that the sound output is the same on either.<ref name="de">[http://problemkaputt.de/everynes.htm Everynes – Nocash NES Specs]</ref><ref name="nl">[http://www.rgame.nl/nesspecs_eng.html NES specificaties]</ref><ref>[http://nesdev.com/2A03%20technical%20reference.txt 2A03 technical reference] by Brad Taylor, 23 Apr. 2004</ref> There is no seperate soundchip. The APU, a [[Programmable Sound Generator|PSG]] integrated in the 2A03 is used to produce audio.<ref>FamiTracker forum:[http://famitracker.com/forum/posts.php?id=4994 NES synthesis theory books]</ref> |
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==References== |
== References == |
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{{reflist}} |
{{reflist}} |
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==External links== |
== External links == |
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* Nesdev wiki:[http://wiki.nesdev.com/w/index.php/APU NES APU] |
* Nesdev wiki:[http://wiki.nesdev.com/w/index.php/APU NES APU] |
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* Wikipedia, Nintendo Entertainment System technical specifications, [https://en.wikipedia.org/wiki/Nintendo_Entertainment_System_technical_specifications#Audio Audio] |
* Wikipedia, Nintendo Entertainment System technical specifications, [https://en.wikipedia.org/wiki/Nintendo_Entertainment_System_technical_specifications#Audio Audio] |
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* [http://midibox.org/forums/topic/4484-midibox-nes/ MIDIbox NES?] |
* [http://midibox.org/forums/topic/4484-midibox-nes/ MIDIbox NES?] |
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* [https://www.gearslutz.com/board/electronic-music-instruments-electronic-music-production/358991-turn-nes-into-synth.html Turn NES into synth] |
* [https://www.gearslutz.com/board/electronic-music-instruments-electronic-music-production/358991-turn-nes-into-synth.html Turn NES into synth] |
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* [http://web.archive.org/web/20021122134759/http://greybox.norfair.org/ greybox], a MIDI-controlled synthesizer that uses the 2A03s on-chip sound generator. |
* [http://web.archive.org/web/20021122134759/http://greybox.norfair.org/ greybox], a MIDI-controlled synthesizer that uses the 2A03s on-chip sound generator. |
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* [http://www.eecg.toronto.edu/~pc/courses/432/2008/projects/nes-audio.pdf FPGA Implementation of the NES Audio Processing Unit] |
* [http://www.eecg.toronto.edu/~pc/courses/432/2008/projects/nes-audio.pdf FPGA Implementation of the NES Audio Processing Unit] |
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* [https://www.youtube.com/channel/UCef3TQ1gY4XIhoIGfLqBPqQ/videos NESizer] by Johan Fjeldtvedt, YouTube |
* [https://www.youtube.com/channel/UCef3TQ1gY4XIhoIGfLqBPqQ/videos NESizer] by Johan Fjeldtvedt, YouTube |