Ricoh 2A03: Difference between revisions

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> There is no seperate soundchip. The APU, a [[Sound chip|Programmable Sound Generator|PSG]] (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>