- Haden, John Miller (1825–1892). John Miller Haden, physician, professor at the Medical Branch of the University of Texas (now the University of Texas Medical Branch at Galveston), and public-health specialist, son of Robert D. and Sarah (McGowen) Haden, Jr., was born on May 25, 1825, in Lowndes County, Mississippi. After attending Jackson College at Columbia, Tennessee, he graduated from La Grange College (Alabama) and in 1847 received his M.D. degree from the Medical College of the University of New Orleans. President James K. Polk commissioned him assistant surgeon in the United States Army in December 1847; Haden was assigned to duty under Gen. Winfield Scott and was with him at the fall of Veracruz. He remained in the army after the Mexican War as medical officer in the party that escorted the civil officials of Oregon Territory to their posts. When the Civil War began Haden was stationed at Fort Bliss in El Paso, Texas. He resigned his commission and entered the Confederate Army medical corps. In 1864 he became chief of the medical bureau of the Trans-Mississippi Department, the headquarters of which were at Marshall, Texas.
- Reverse engineering the Intel 386 processor’s register cell (righto.com)
The groundbreaking Intel 386 processor (1985) was the first 32-bit processor in the x86 line. It has numerous internal registers: general-purpose registers, index registers, segment selectors, and more specialized registers. In this blog post, I look at the silicon die of the 386 and explain how some of these registers are implemented at the transistor level. The registers that I examined are implemented as static RAM, with each bit stored in a common 8-transistor circuit, known as “8T”. Studying this circuit shows the interesting layout techniques that Intel used to squeeze two storage cells together to minimize the space they require.