INT 4A - Acorn BBC Master 512 - "OSWORD" - MISC FUNCTIONS USING CONTROL BLOCK

	AL = function code
	    FAh transfer data between 80186 and 65C12 I/O processor
	DS:BX -> control block (see #03211)
Return: FLAGS destroyed
	control block updated
Note:	there are more functions than are listed here, but details are not
	  available
SeeAlso: INT 40"Acorn",INT 4B"Acorn",INT 4C"Acorn"