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DTK/ERSO XT Beep Codes

  • 1 Short Begin POST and End POST
  • Long-Short Long-Short Long-Short Video Initialization Failure, or Invalid Video Switch Setting
  • 1 Long Keyboard Failed or Locked, Interrupt or Other System Board Error
  • Continuous Tone First 64K RAM Failure
  • 1 Short Repeated Indefinitely Parity Error in First 64K RAM
  • Long-Short Floppy Disk Drive or Controller Failure
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