1969 - The interconnection masks on this device were generated on Fairchild's computer-aided design system and implemented with t he first three layer metal process. This is a 48-gate custom TTL logic array. From: A Solid State of Progress - 1973 - Fairchild Camera and Instrument Company
Prefetching added a lot of complications to the memory control circuitry since prefetches and "regular" memory accesses both needed to use the bus and needed to avoid conflict. My blog post has more information on how 8086 prefetching works: https://www.righto.com/2023/01/inside-8086-processors-instruction.html
Inside the 8086 processor's instruction prefetch circuitry
The groundbreaking 8086 microprocessor was introduced by Intel in 1978 and led to the x86 architecture that still dominates desktop and se...