- Pac-Man is a 1982 maze video game developed and published by Atari, Inc. under official license by Namco, and an adaptation of the 1980 hit arcade game of the same name. The player controls the title character, who attempts to consume all of the wafers in a maze while avoiding four ghosts that pursue him. Eating flashing wafers at the corners of the screen causes the ghosts to temporarily turn blue and flee, allowing Pac-Man to eat them for bonus points. Once eaten, a ghost is reduced to a pair of eyes, which return to the center of the maze to be restored.
- 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.