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Int 14 Fn 23  - Multidos Plus - Get Port Status                            [S]

   AH = 23h
   DX = port number

Return: AH = line status (see AH=03h)
   AL = modem status (see AH=03h)

See Also: AH=03h,AH=07h"MultiDOS",AH=20h"MultiDOS"
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