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====== Int 14H, AH=02H ======

===== Version =====

IBM 5150 and higher

===== Brief =====

Recieve character from port

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

[[en:docs:fapi:DosRead]]

===== Input =====

  * AH = 02h
  * AL = 00h (ArtiCom)
  * DX = port number (00h-03h) (04h-43h for Digiboard XAPCM232.SYS)

===== Return =====

  * AH = line status (see #00304)
  * AL = received character if AH bit 7 clear

===== Macro =====

<code asm>
INCLUDE BIOS.INC

@AuxRecieveChar 0
</code>

===== Notes =====

  * will timeout if DSR is not asserted, even if function 03h returns data ready
  * various network and serial-port drivers support the standard BIOS functions with interrupt-driven I/O instead of the BIOS's polled I/O
  * the 1993/04/08 Compaq system ROM uses only the low two bits of DX

===== Note =====

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

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