Complex sentence: The original IBM PC based on the Intel 8088 processor used several of these chips; the equivalent functions today are provided by VLSI chips, namely the "Southbridge" chips.
Split into simpler sentences: The original IBM PC based on the Intel 8088 processor used many of these chips. The functions of some of these chips in IBM PC compatibles today are provided by functions embedded into VLSI chips, namely the "Southbridge" chips.