INT 15 U - Phoenix BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. 4.0 Rel 6.0 - ???
	AX = 5380h
	BX = 8000h
	CX = 0020h
Return: ???
Note:	although a check for the indicated value is present in the examined
	  copy of the BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly., no code was associated with it (possibly an OEM(Original Equipment Manufacturer) a company which purchases components that are resold as part of its own products under the company's own brand name, e.g. a Gateway 2000-branded monitor may actually be a Mag or NEC monitor.
	  option not included in that copy) and this function always returns
	  CF set/AH=03h if CX=0020h and CF set/AH=86h for CX<>0020h
SeeAlso: AX=5380h/BX=8001h