DIFF Subgroup
G06F 13/4265 Full Title
Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units (interface circuits for specific input/output devices G06F3/00 ; multiprocessor systems G06F15/16 ) > Information transfer, e.g. on bus (G06F13/14 takes precedence) > Bus transfer protocol, e.g. handshake; Synchronisation
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.