- Silicon reverse engineering: The 8085’s undocumented flags (righto.com)
The 8085 microprocessor has two undocumented status flags: V and K. These flags can be reverse-engineered by looking at the silicon of the chip, and their function turns out to be different from previous explanations. In addition, the implementation of these flags shows that they were deliberately implemented, which raises the question of why they were not documented or supported by Intel. Finally, examining how these flag circuits were implemented in silicon provides an interesting look at how microprocessors are physically implemented.
- Andrew Johnson (Wikipedia)
Andrew Johnson (December 29, 1808 – July 31, 1875) was an American politician who served as the 17th president of the United States from 1865 to 1869. He assumed the presidency following the assassination of Abraham Lincoln, as he was vice president at that time. Johnson was a Democrat who ran with Abraham Lincoln on the National Union Party ticket, coming to office as the Civil War concluded. He favored quick restoration of the seceded states to the Union without protection for the newly freed people who were formerly enslaved as well as pardoning ex-Confederates. This led to conflict with the Republican-dominated Congress, culminating in his impeachment by the House of Representatives in 1868. He was acquitted in the Senate by one vote.