==Counter/Timer Circuit==
===InformationsInformation===
The Z84C30 has four independently programmable counter/timer channels interfaced directly with the Z80 CPU. You can get full information in the CTC datasheet ([[File:Z80ctc.pdf]]).
Don't forget to use RETN for NMI handlers as well as RETI for normal interrupt handlers. In other case, the Z80 CPU will not
aknowledge the next interrupt properly.
==Audio Channels==
===Informations===