- Reverse-engineering the 8085’s ALU and its hidden registers (righto.com)
This article describes how the ALU of the 8085 microprocessor works and how it interacts with the rest of the chip, based on reverse-engineering of the silicon. (This is part 2 of my ALU reverse-engineering; part 1 described the circuit for a single ALU bit.) Along with the accumulator, the ALU uses two undocumented registers - ACT and TMP - and this article describes how they work in detail, as well as how the ALU is controlled.
- Temple of Hephaestus (Wikipedia)
The Temple of Hephaestus or Hephaisteion (also “Hephesteum” or “Hephaesteum”; Ancient Greek: Ἡφαιστεῖον, Greek: Ναός Ηφαίστου, and formerly called in error the Theseion or “Theseum”; Ancient Greek: Θησεῖον, Greek: Θησείο), is a well-preserved Greek temple dedicated to Hephaestus; it remains standing largely intact today. It is a Doric peripteral temple, and is located at the north-west side of the Agora of Athens, on top of the Agoraios Kolonos hill. From the 7th century until 1834, it served as the Greek Orthodox church of Saint George Akamates. The building’s condition has been maintained due to its history of varied use.