INT 2F - PTS-DOS 6.51, S/DOS 1.0+ - "SYSBELL" - EMIT A BEEP
	AX = 1270h
Return: ???
Note:	This function is known to be supported by Paragon Technology Systems
	  PTS-DOS 6.51 and S/DOS 1.0, and probably was also supported
	  in earlier releases.
SeeAlso: AX=1271h