I was finally able to get my hands on the OKI MSM-5232 tone generator data sheet today (after how many years looking for it?). Thanks for that find goes to the great people on the MAME discussion boards. And since I got that data sheet, I went through some of my files and posted a stack of other data sheets that refer to chips used on the Poly-800. Enjoy! Mike.
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Files uploaded - including the mysterious MSM5232
2009-07-06 by korgpolyex800