INT 15 - DESQview v2.20+ - internal - ???                                       
	AX = DE18h
	BP = function number
	    high byte must be 10h
	    low byte is function
		00h set ???
		    BL = ???  (00h-10h, video mode???)
		    BH = value to store
		03h set ???
		    BL = ??? (stored in driver)
		0Ah get ???
		    ES:DI -> 18-byte buffer to hold ???
Note:	calls video driver (NOP for Hercules driver,probably CGAColor Graphics Adapter(Color/Graphics Adapter) One of the two video display boards introduced together with the original IBMInternational Busiuness Machines PCIBM PC.  See also HGC, MDA. and MCGAMulti-Color Graphics Array(Multi-Color Graphics Array) The low-end color adapter offered in IBMInternational Busiuness Machines's early PS/2IBM PS/2, any model series machines. also)