The procedure to write data to a specific PSG register from the PPI is quite tedious. It consists of the following steps:
* # Write the register number to PPI Port A* # set BC1/BDIR to Select Register* # and back to Inactive* # Now write the data to PPI Port A* # set BC1/BDIR to Write Data* # and back to Inactive.
Consult this article for more information: [[How to access the PSG via PPI]]