INT 2F U - CDBLITZ v2.11 - DISABLE CACHE                                        
	AX = 1500h
	CH = 93h (function number)
	BX = 1234h (magic value for CDBLITZ)
Return: CF clear
SeeAlso: AX=1500h/CH=90h,AX=1500h/CH=92h,AX=1500h/CH=95h