YM2610 registers

=Timers=

See YM2610 timers.

=SSG part=

See SSG for details on this part's operation.

=FM part=

See FM for details on this part's operation.

=ADPCM part=

See ADPCM for details on this part's operation.

=Reading=

The only writable registers that can also be read are the SSG ones. To read register X, write X to Z80 port 4, then read Z80 port 5.