INT 14 - X00 FOSSIL - DESTRUCTIVE READ WITH NO WAIT
AH = 20h
DX = port number
Return: AH = 00h if character was available
AL = next character (removed from receive buffer)
AX = FFFFh if no character available
SeeAlso: AH=21h"X00"

See also: 140C

1420 - X00 FOSSIL - DESTRUCTIVE READ WITH NO WAIT