Registers

This is one bit from OSC3, a read-only register which allows access to the upper eight bits of the third voice's waveform.

The waveform bits are latched at sid_clk1 and pushed to the databus when the register's line is activated from the address decoder.

The following is from the voice 1 control register.

The databus bits are latched when the register's line is activated. At sid_clk1 the value is forwarded to the components that need it and is also fed back into the latch to keep the bit alive.