[sdiy] Yamaha YM3012 datasheet needed

[cheater]

Hey all,

my DX11 is a digital synth, and lately I was
wondering about the possibilities of hacking
s/pdif out into that synth.
Turns out it is using a rather common DAC
(also used in game booths etc), but the specs
are unobtainum.

Weird fact:
the chip has one lead coming off and ending
abruptly after some 2 centimeters. No
through-hole, no nothing.

I bet it's communicating info about my music
to the FBI :(