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WEIRD THINGS I LEARNED WHILE WRITING AN X86 EMULATOR

This article explores unusual aspects of the x86 instruction set architecture discovered while creating an x86 emulator for time travel debugging. There are multiple encodings for the same instructions in the architecture. It uses prefixes to modify instruction behavior. The author also notes the peculiar nature of segment overrides in both 32-bit and 64-bit modes, the surprising behavior of shift instructions, and the inconsistent handling of flags by different instructions.

REAL-TIME AUDIO PROGRAMMING 101: TIME WAITS FOR NOTHING

Real-time audio programming requires avoiding any code that might cause delays or unpredictable behavior, as such glitches would disrupt the smooth flow of audio data and lead to undesirable sound artifacts. People working with real-time audio need to understand worst-case execution times and avoid common pitfalls like locking, memory allocation, and external events within the audio callback function. To achieve seamless audio processing, employ lock-free data structures and atomic operations for communication between real-time and non-real-time contexts.

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