Format of parameter block for DOS 3??? screen mode functions 40h and 60h:
Offset	Size	Description	)
 00h	WORD	length of folowing data (0009h)
 02h	BYTE	mode type
 03h	WORD	number of colors
 05h	WORD	width
 07h	WORD	height
Note:	these functions appear never to have been released to the public
SeeAlso: #01546