I/O Map
The following table lists the main I/O definitions of the RCA Studio II.
Q
Sound on/off: fixed tone
EF1
CDP 1861 display: display status
EF3
Key pressed on selected port (key pad 1)
EF4
Key pressed on selected port (key pad 2)
OUT 1
CDP 1861 display: display off
OUT 2
Select key / port
INP 1
CDP 1861 display: display on