INT 7F - Alloy MW386 - WRITE BYTE TO CONSOLE PORTIBM PC Portable (uses same BIOS as XT)
	AH = C6h
	AL = byte to write
Return: CF clear if successful
	CF set on error (caller is not remote user)
Note:	any terminal driver data translation will be bypassed
SeeAlso: AH=C3h,AH=C7h