qa.hlp (Table of Contents; Topic list)
Int 21H Function 05H
   Summary  Notes  Back
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  Description:  Printer Output
 
  Sends a character to the standard list device. The default is the
  printer on the first parallel port (LPT1), unless explicitly redirected
  by the user with the MODE command.
 
  Input                                Output
  ═════════════════════════            ═══════
  AH=05H                               Nothing
  DL=8-bit data for output
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