The architecture is based upon the SAP series of computers from Albert Malvino’s book, Digital Computer Electronics ... The ASAP-3’s instruction set is microcode, based upon the 8085 ...

which led to Intel suing NEC over copying the microcode that forms an integral part of the x86 architecture. In a recent The Chip Letter entry by [Babbage] this case is covered in detail.

In a nutshell: Google researchers recently disclosed a stealthy security flaw dubbed "EntrySign" that allowed malicious code execution through unsigned microcode patches on AMD processors from Zen ...

Google’s latest security bombshell tool is already fuelling an underground bid to rewrite the rules of chip architecture ... revealing how bits of AMD's Zen microcode can be modified.

x86 is a complex instruction set computer (CISC) instruction set architecture (ISA ... such as Arm or RISC-V. CPU microcode is a low-level layer that translates complex x86 CISC instructions ...