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Yamaha YM2203 FM Operator Type-N (OPN)
The YM2203 is a chip of considerable interest to the arcade game emulator writer, because it's just about THE most common audio synth chip used on arcade boards.
This document was obtained from Yamaha Systems Technology's faxback service. To save everybody else in the world from calling the USA and requesting a 14-page fax, I have transcribed the text portions here. I have not reproduced the diagrams. Also note that the original document's tables were apparently drawn by hand; while I was typing it in, I had to estimate the bitfield widths in the register maps. I have also preserved the original English.
This information is just a datasheet, not a complete programmer's reference manual. Recommended reading to understand this document is the General Instruments datasheet for the AY-3-8910A. Tandy Electronics packaged the GI chip and retailed it with a very detailed application manual which is also good reading.
NO. 84-13 1
The specifications of this product are subject to improvement changes without prior notice.