Index for interrupt INT FF

Table of Contents by Order
FF - INT FF - AT/XT286/PS50+ - destroyed by return from protected mode
FF - INT FF - Z100 - WARM BOOT
FF - INT FF - Sanyo MBC-550/555 - IRQ7 - USER INTERRUPT FOR EXTERNAL INTERRUPT
FF - INT FF U - QEMM-386.SYS v6.0+ - internal
FF - INT FF - VIRUS - "Violetta" - ???
FF----BX0000 - INT FF - PC/FORTH - GRAPHICS API - VIDEO STATUS CHANGE
FF - INT FF - PC/FORTH - GRAPHICS API

INT FF - AT/XT286/PS50+ - destroyed by return from protected mode
Note:	(see INT FE"XT286")
SeeAlso: INT FE"XT286"

INT FF - Z100 - WARM BOOT
SeeAlso: INT 40"Z100"

INT FF - Sanyo MBC-550/555 - IRQ7 - USER INTERRUPT FOR EXTERNAL INTERRUPT
Note:	normally masked off at the 8259 interrupt controller
SeeAlso: INT 0F"IRQ7",INT FE"Sanyo"

INT FF U - QEMM-386.SYS v6.0+ - internal
Notes:	requires that a byte in the conventional-memory stub be set to the
	  desired function number (00h through 0Ch)
SeeAlso: #04081

(Table 04081)
Values for QEMM internal functions:
 00h	reflect back to Virtual86-mode interrupt handler (default)
 01h	???
 02h	access DR7???
 03h	QPI upcall (see INT 67/AH=3Fh)
 04h	???
 05h	???
 06h	INT 15/AH=87h
 07h	EMS services (see INT 67/AH=40h,INT 67/AH=5Dh)
 08h	???
 09h	QEMM exception handler
 0Ah	XMS services (see INT 2F/AX=4310h"XMS")
 0Bh	Virtual DMA Services (see INT 4B/AX=8102h)
 0Ch	???

INT FF - VIRUS - "Violetta" - ???
Note:	used but not chained by virus
SeeAlso: INT E0"VIRUS",INT F1"VIRUS"

INT FF - PC/FORTH - GRAPHICS API - VIDEO STATUS CHANGE
	BX = 0000h
	DS:SI -> FORTH program counter
	SS:BP -> FORTH parameter stack
	SS:SP -> FORTH return stack
	DS:DX -> FORTH video parameter area
Desc:	called to inform graphics driver of any status changes such as video
	  mode changes, character color changes, graphics XOR mode turned on
	  or off, etc.; also used as an installation check
Index:	installation check;PC/FORTH

INT FF - PC/FORTH - GRAPHICS API
	BX = function number
	    0001h function REDRAW
	    0002h function !PEL
	    0003h function @PEL
	    0004h function LINE
	    0005h function ARC
	    0006h function @BLOCK
	    0007h function !BLOCK
	    0008h function FLOOD
	DS:SI -> FORTH program counter
	SS:BP -> FORTH parameter stack
	SS:SP -> FORTH return stack
	details of parameters not available
Return:	AX,BX,CX,DX,ES,DI may be destroyed
Note:	these functions all display an error message if the graphics routines
	  are not resident