This polling can be done by a specialized processor in the device to prevent burdening the main CPU.
For example, when an instruction required any address calculations, the main CPU would handle them before the 68881 took control.
The latter used the 6809E as their main CPU.
The main CPU needs to do the bulk of the work.
One acted as the main CPU, the other dealt with the input/output and display interface.
Interrupts use the main CPU of the system.
The copper runs a program called the copper list in parallel with the main CPU.
The main CPU then orchestrates the entire affair.
Also residing within the main CPU, it is responsible for decompressing images and video.
However, its damaged main CPU and right arm were recovered by Cyberdyne.