INT 14 - MultiDOS Plus IODRV - READ CHARACTER FROM PORT
AH = 05h
AL = timeout in seconds (00h = never)
Return: AL = status
00h successful
AH = character read
01h read error
02h timed out
other modem status (CTS, DSR) changed
Note:   the port number is stored at offset BEh in the Task Control Block
SeeAlso: AH=04h"MultiDOS",AH=06h"MultiDOS",AH=22h"MultiDOS"

See also: 1402

1405 - MultiDOS Plus IODRV - READ CHARACTER FROM PORT