- Conditional instructions in the ARM1 processor, reverse engineered (righto.com)
By carefully examining the layout of the ARM1 processor, it can be reverse engineered. This article describes the interesting circuit used for conditional instructions: this circuit is marked in red on the die photo below. Unlike most processors, the ARM executes every instruction conditionally. Each instruction specifies a condition and is only executed if the condition is satisfied. For every instruction, the condition circuit reads the condition from the instruction register (blue), evaluates the condition flags (purple), and informs the control logic (yellow) if the instruction should be executed or skipped.
- Herbert Hoover (Wikipedia)
Herbert Clark Hoover (August 10, 1874 – October 20, 1964) was an American politician and humanitarian who served as the 31st president of the United States from 1929 to 1933. A member of the Republican Party, he held office during the onset of the Great Depression. A wealthy mining engineer before his presidency, Hoover led the wartime Commission for Relief in Belgium, served as the director of the U.S. Food Administration, and served as the U.S. Secretary of Commerce.