APCAPCAPC schematic question

[fredrik]

Replied in the other thread.

Atari Atari Atari Punk Punk Punk Console Console Console

Q is what’s usually called OUT in 555/556 pinouts; it’s the buffered output of the internal flip-flop. It looks like this circuit is taking the output signal from the charge circuitry instead (i.e. the voltage over the capacitor), I assume to get a nicer waveform.