If you consider their architecture though you come to a surprising realisation. It is rare these days to interface directly to a microprocessor bus ... comes with a ROM BASIC, and interfaces ...

Although ARM CPUs have been making headway in several areas of computing over the last decade or so, the vast majority of desktop, laptop and server CPUs are still based on the x86 architecture.

Here’s a peek at the events and technologies that led to the development of Intel’s x86 architecture ... with an 8-bit bus. 1980: Intel introduces the 8087 math co-processor.