- Extracting ROM constants from the 8087 math coprocessor’s die (righto.com)
Intel introduced the 8087 chip in 1980 to improve floating-point performance on the 8086 and 8088 processors, and it was used with the original IBM PC. Since early microprocessors operated only on integers, arithmetic with floating-point numbers was slow and transcendental operations such as arctangent or logarithms were even worse. Adding the 8087 co-processor chip to a system made floating-point operations up to 100 times faster.
- Ur (Wikipedia)
Ur (/ʊər/; Sumerian: 𒌶𒆠, 𒋀𒀕𒆠, or 𒋀𒀊𒆠 Urim; Akkadian: 𒋀𒀕𒆠 Uru; Arabic: أُوْر, romanized: ʾūr; Hebrew: אוּר) was an important Sumerian city-state in ancient Mesopotamia, located at the site of modern Tell el-Muqayyar (Arabic: تل ٱلْمُقَيَّر) in south Iraq’s Dhi Qar Governorate. Although Ur was once a coastal city near the mouth of the Euphrates on the Persian Gulf, the coastline has shifted and the city is now well inland, on the south bank of the Euphrates, 16 km (10 mi) from Nasiriyah in modern-day Iraq. The city dates from the Ubaid period circa 3800 BC, and is recorded in written history as a city-state from the 26th century BC, its first recorded king being Mesannepada.