- 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.
- Memex (Wikipedia)
Memex is a hypothetical electromechanical device for interacting with microform documents and described in Vannevar Bush’s 1945 article “As We May Think”. Bush envisioned the memex as a device in which individuals would compress and store all of their books, records, and communications, “mechanized so that it may be consulted with exceeding speed and flexibility”. The individual was supposed to use the memex as an automatic personal filing system, making the memex “an enlarged intimate supplement to his memory”. The name memex is a portmanteau of memory and expansion.