Index for interrupt INT EF

Table of Contents by Order
EF - INT EF - BASIC - ORIGINAL INT 09 VECTOR
EF----CX00C8 - INT EF - GEM - AES INTERFACE
EF----CX00C9 - INT EF - GEM - AES INTERFACE
EF----CX0473 - INT EF - GEM - VDI INTERFACE

INT EF - BASIC - ORIGINAL INT 09 VECTOR
Note:	BASIC.COM/BASICA.COM do not restore vector on termination
SeeAlso: INT EE"BASIC",INT F0"BASIC"

INT EF - GEM - AES INTERFACE
	CX = 00C8h
	DX = 0000h
	ES:BX -> AES parameter block (see #04064)
SeeAlso: INT EF/CX=00C9h,INT EF/CX=0473h

Format of AES parameter block:
Offset	Size	Description	(Table 04064)
 00h	DWORD	-> control array (see #04065)
 04h	DWORD	-> global variables (15 WORDs)
 08h	DWORD	-> integer input parameters
 0Ch	DWORS	-> buffer for integer results
 10h	DWORD	-> address (DWORD) input parameters
 14h	DWORD	-> buffer for address (DWORD) results
SeeAlso: #04066

Format of AES control array:
Offset	Size	Description	(Table 04065)
 00h	WORD	function number (000Ah-0084h)
 02h	WORD	number of words of integer input parameters
 04h	WORD	number of words available for integer results
 06h	WORD	number of words of address input parameters
 08h	WORD	number of words available for address results
SeeAlso: #04064

INT EF - GEM - AES INTERFACE
	CX = 00C9h
	DX = 0000h
	ES:BX -> AES parameter block (see #04064)
SeeAlso: INT EF/CX=00C8h,INT EF/CX=0473h

INT EF - GEM - VDI INTERFACE
	CX = 0473h
	DS:DX -> GEM VDI parameter block (see #04066)
Note:	if installed, one of the following ASCII signatures will appear two
	  bytes after the INT EF entry point:
	    "GEMVDI"	GEM VDI (but not AES) is present
	    "GEMAES"	GEM/ViewMAX VDI and AES are both present
	    "ViewMAX"	ViewMAX VDI (only) is present
	  each of the above is followed by an ASCIZ number indicating the
	  version ("10" for GEM/1 AES and VDI; "20" for GEM/2,GEM/3,ViewMAX
	  AES and GEM/2 VDI; "23" for GEM/3 VDI; and "1" for ViewMAX VDIs)
SeeAlso: INT EF/CX=00C8h,INT EF/CX=00C9h
Index:	installation check;GEM

Format of VDI parameter block:
Offset	Size	Description	(Table 04066)
 00h	DWORD	-> control array (see #04067)
 08h	DWORD	-> integer parameters
 0Ch	DWORD	-> (x,y) pair parameters
 10h	DWORD	-> integer results
 14h	DWORD	-> (x,y) pair results
SeeAlso: #04064

Format of VDI control array:
Offset	Size	Description	(Table 04067)
 00h	WORD	(call) function number (0001h-0084h)
 02h	WORD	(call) number of words of pair parameters
 04h	WORD	(ret) number of words of pair results
 06h	WORD	(call) number of words of integer parameters
 08h	WORD	(ret) number of words of integer results
 0Ah	WORD	subfunction number
 0Ch	WORD	graphics handle
 0Eh	DWORD	(call) -> pointer parameter
 12h	DWORD	(ret) -> pointer result
SeeAlso: #04066