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====== Int 21H, AH=04H ======

===== Version =====

1 and higher

===== Brief =====

WRITE CHARACTER TO STDAUX

===== Family API =====

[[en:docs:fapi:DosWrite]]

===== Input =====

  AH = 04h
  DL = character to write

===== Return =====

nothing

===== Notes =====

 keyboard checked for ^C/^Break, and INT 23 executed if detected

 STDAUX is usually the first serial port

 if STDAUX is busy, this function will wait until it becomes free

===== See also =====

AH=[[en:docs:dos:api:int21:03|03h]],INT 14/AH=01h,INT E0/CL=04h

===== Note =====

Text based on [[http://www.cs.cmu.edu/~ralf/files.html|Ralf Brown Interrupt List Release 61]]

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