* for reading data from PSG all bits must be set to input (thereafter, output direction should be restored, for compatibility with the BIOS).
Bit7{|{{Prettytable|width: 700px; font-0 size: 2em;}}|''Bit''||''Description''||''Usage''|-|7-0||PSG.DATA||[[PSG]] databusDatabus (Sound/Keyboard/Joystick)|-|}
== PPI Port B ==