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For instance, in a system using 32-bit instructions, you might wish to have three registers, such that you can perform operations of the type = +. If the register file contains 32 entries, each one of the references will require 5 bits, and the set of three registers thus takes up 15 bits, leaving 17 to encode the operation and other information.
The first commercial microprocessor, the 4-bit Intel 4004, began with the "Busicom Project" [151] in 1968 as Masatoshi Shima's three-chip CPU design for the Busicom 141-PF calculator. [ 114 ] [ 151 ] In April 1968, Shima was tasked with designing a special-purpose LSI chipset, along with his supervisor Tadashi Tanba, for use in the Busicom 141 ...
While gaining support for 64-bit platforms, Android was first made to run on 64-bit x86 and then on ARM64. An unofficial experimental port of the operating system to the RISC-V architecture was released in 2021.