DIFF Subgroup
G06F 13/124 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 ) > Program control for peripheral devices (G06F13/14 - G06F13/42 take precedence) > using hardware independent of the central processor, e.g. channel or peripheral processor
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.