=== PSG signals ===
{|{{Prettytable|width: 700px; font-size: 2em;}}
|''PPI Port C Bit''||''PSG Signal''
|-
|7||BDIR
|-
|6||BC1
|-
|}
=== PSG function selection ===
{|{{Prettytable|width: 700px; font-size: 2em;}}
|colspan=2|''PPI Port C BitBits''||rowspan=2|''PSG Function''
|-
|7Bit7 BDIR||6Bit6 BC1
|-
|0||0||Inactive