INT 81 - Gravis UltraSound - MegaEm - PROCESS COMMAND LINE                      
	AX = 0200h
	BX = PSPsee Program Segment Prefix segment
	SI = ??? (data area)
Return: AX = status (see #03975)
	BL = emulation state
	    bit 1   Emulation is on
	    bit 2   Emulation is off
Program: MegaEm is a protected-mode SoundBlasterA common sound card developed by Creative Labs., SoundCanvas, and MT-32
	  emulator for the Gravis UltraSound
Range:	INT 81 to INT FF (see INT 21/AX=FD12h), selected by scanning for an
	  interrupt with vector 0000h:0000h
SeeAlso: AX=0202h,AX=0300h,AX=0400h,INT 21/AX=FD12h/BX=3457h


(Table 03975)
Values for MegaEm status:
 0000h	successful
 0001h	invalid command line optie
 0002h	display options
 0003h	???
 0004h	invalid number of voices specified
 0005h	could not load enough patches to provide acceptable emulation
 0006h	to many warnings on patch loading
 0007h	??? (not used anymore)
 0008h	/CO and SCSI(Small Computer Systems Interface) A system-independent expansion bus typically used to connect hard disks, tape drives, and CD-ROMs to a computer.	A host adapter connects the SCSI bus to the computer's own bus.  See also ESDI, IDE. don't work together
 0009h	invalid music volume
 000Ah	invalid master volume
 000Bh	/SC switch is no longer valid
 0100h	??? (some error on patch loading)