I'm testing the SN76489AN chip with Arduino and I'm able to play the 3 tones I want etc BUT I don't understand why the READY pin is not working? The datasheet says the pin goes high when the chip is ready and low when it's busy with processing a command. But the READY pin is always low! I've got 2 brand new pieces of the chip and they both act this way. I've even tried to pull-up this pin but it didn't help. I see everyone is just using
delayMicroseconds in their examples, so I guess it is a common problem but it's just strange... Is it a bug in the chip or what? Does anyone know?