Intel documentation describes the 386's Protection Test Unit as a component that "implements fast testing of complex memory protection functions." It is mostly composed of a PLA (Programmable Logic Array), referred to as Test PLA by Intel, that is physically visible by its regular appearance on the die. This single piece of combinational logic replaces what would otherwise be dozens of multi-cycle conditional branches in the microcode. Instead of testing privilege rules sequentially, the microcode issues a single protection test operation, and the PLA evaluates all applicable rules in parallel, producing a complete decision in one evaluation: continue, fault, or redirect to a gate handler.
Over the past year or two, I’ve seen many organizations, large and small, implement passkeys (which is great, thank you!) and use the PRF (Pseudo-Random Function) extension to derive keys to protect user data, typically to support end-to-end encryption (including backups).
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The perpetrator of the shooting had their ChatGPT account suspended in June 2025 after OpenAI detected content from the user that presented "an indication of potential real-world violence." OpenAI banned the user and considered alerting authorities. However, OpenAI decided not to inform law enforcement after determining that the user had no credible plan to act out.
Жители Санкт-Петербурга устроили «крысогон»17:52
Running systemd-sysusers... done