INT 14 - MultiDOS Plus - RECEIVE CHARACTER
AH = 22h
DX = port number
Return: AH = status (see also AH=21h"MultiDOS")
00h successful
AL = character
3Dh framing and parity error
3Eh overrun error
3Fh framing error
40h parity error
96h ring buffer overflow
Note:   if no character is available, this function waits until a character
arrives or an implementation-dependent timeout elapses
SeeAlso: AH=21h"MultiDOS",AH=27h

See also: 1420

1422 - MultiDOS Plus - RECEIVE CHARACTER