iAPX-432 was supposed to be the last ISA Intel ever made, but it didn't quite work out that way [1]: > Gordon Moore believed Intel’s next ISA would last the li

iAPX-432 was supposed to be the last ISA Intel ever made, but it didn't quite work out that way [1]: > Gordon Moore believed Intel’s next ISA would last the lifetime of Intel, so he hired many clever computer science Ph.D.’s and sent them to a new facility in Portland to invent the next great ISA. The 8800, as Intel originally named it... > This ambitious project was alas several years late, forcing Intel to start an emergency replacement effort in Santa Clara to deliver a 16-bit microprocessor in 1979. Intel gave the new team 52 weeks to develop the new “8086” ISA and design and build the chip. Given the tight schedule, designing the ISA took only 10 person-weeks over three regular calendar weeks... > Intel’s original 8800 project was renamed iAPX-432 and finally announced in 1981... [1] https://dl.acm.org/doi/pdf/10.1145/3282307 https://dl.acm.org/doi/pdf/10.1145/3282307