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] console, (known as the Famicom in Japan), containing both CPU and APU.
[[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).


==Technical details==
==Technical details==
Produced [https://en.wikipedia.org/wiki/Ricoh Ricoh] based on a [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&nbsp;MHz. PAL versions used the 2A07 processor, which is identical to the 2A03 except that it runs at 1.66&nbsp;MHz. Timing differences between NTSC & PAL versions are to ensure that the sound output is the same on either. All audio waveform generation is done in the APU.<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>
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&nbsp;MHz. PAL versions used the 2A07 processor, which is identical to the 2A03 except that it runs at 1.66&nbsp;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> The APU, a [[Programmable Sound Generator|PSG]] inside the 2A03 is used to produce audio.<ref>FamiTracker forum:[http://famitracker.com/forum/posts.php?id=4994 NES synthesis theory books]</ref>


==References==
==References==

Revision as of 11:25, 14 October 2014

The RP2A07 PAL version.

The Ricoh 2A03, RP2A03 (NTSC), Ricoh 2A07, RP2A07 (PAL) or 2A03 is the 8-bit microprocessor in the NES, (also known as the Famicom).

Technical details

Manufactured by Ricoh and based on the 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.[1][2][3] The APU, a PSG inside the 2A03 is used to produce audio.[4]

References

  1. ^ Everynes - Nocash NES Specs
  2. ^ NES specificaties
  3. ^ 2A03 technical reference by Brad Taylor, 23 Apr. 2004
  4. ^ FamiTracker forum:NES synthesis theory books

External links

Retrieved from "https://sdiy.info/wiki/Ricoh_2A03?oldid=7576"