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Comment by huhtenberg | Hacker News Reader

Back in real-mode x86 times the coolest thing could've been done in 2 lines

  CLI     ; Disable interrupts
  HLT     ; Halt CPU until next interrupt

This hung the machine dead.

Unless there's a memory error (which is hooked up to the NMI line), or on the PCjr, a key was hit on the keyboard (which was hooked up to the NMI).

Neat hack though (and question: why do I remember this stuff?)

This is not cool in my book.

... nor is downvoting nerdy posts on HN of all places :)

Not to forget the F00F bug, which did the same thing in full-blown protected mode.