Intel introduced the 8088 microprocessor in 1979, which IBM adopted for the iconic IBM PC in 1981, solidifying the success of the x86 architecture. The 8088’s 8-bit bus, similar to the 8085, was a key factor in its selection for the IBM PC. The intricate bus cycle structure of the 8088, involving T-states, had multiple complexities and optimizations like address calculation, address corrections, prefetching, wait states, and handling HALT instructions. The state machine implementing these bus cycles is detailed with specific circuitry explanations, showcasing the technical intricacies of one of Intel’s pioneering processors.
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