Changes
/* U82536 CIO (equivalent to Zilog Z8536 CIO) */
|''Port''||''A9''||''A8''||''Register''||''Usage in KC Compact''
|-
|&ECxx||0||0||Port B data register||is setup as timer and is connected to the video hardware (?)
|-
|&EDxx||0||1||Port C data register||setup as timer and is connected to the Interrupt hardware
