Changes

==Counter/Timer Circuit==

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===