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Platform processors have been an integral part of computer systems since the late 1970s. The x86 processor, introduced in the late 1970s, has been consistently accompanied by smaller helper processors that manage essential tasks. For instance, platform processors from 1983–1984 were involved in handling functions such as keyboard input and resetting the platform. Notably, the A20 line emerged as a significant hardware feature during this period.
The evolution of platform processors has led to the incorporation of additional processors in modern laptops, primarily tasked with thermal management and hot-plugging events. These platform processors, often based on architectures like the 8051 or Hitachi's processors, continue to play vital roles in system management.