Question about AY-3-8910

ZXNet echo conference «real.speccy»

From Yan Zagorskih To All 15 September 1998

Greetings, All!

SABZH. After the tragic death of one of the Spectrums, I have a sound handkerchief lying around idle, with this chip. I am interested in any
information on this microcircuit, in particular the purpose of the pins.
I only know the purpose of some pins -
1,3,4,22,23,24,25,30...37,
38,40. I heard there are some registers in it, but how they are
selected and what is entered into them is not clear.
Help, whoever you can!

See you. Jan Zagorskikh.