comment ~
INT 10 - VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION
	AX = 4F00h
	ES:DI -> buffer for SuperVGA information (see #00077)
Return: AL = 4Fh if function supported
	AH = status
	    00h successful
		ES:DI buffer filled
	    01h failed
	    ---VBE v2.0---
	    02h function not supported by current hardware configuration
	    03h function invalid in current video mode
Desc:	determine whether VESA BIOS extensions are present and the capabilities
	  supported by the display adapter
SeeAlso: AX=4E00h,AX=4F01h,AX=7F00h"SOLLEX",AX=A00Ch
Index:	installation check;VESA SuperVGA

Format of SuperVGA information:
Offset	Size	Description	(Table 00077)
 00h  4 BYTEs	(ret) signature ("VESA")
		(call) VESA 2.0 request signature ("VBE2"), required to receive
		  version 2.0 info
 04h	WORD	VESA version number (one-digit minor version -- 0102h = v1.2)
 06h	DWORD	pointer to OEM name
		"761295520" for ATI
 0Ah	DWORD	capabilities flags (see #00078)
 0Eh	DWORD	pointer to list of supported VESA and OEM video modes
		(list of words terminated with FFFFh)
 12h	WORD	total amount of video memory in 64K blocks
---VBE v1.x ---
 14h 236 BYTEs	reserved
---VBE v2.0 ---
 14h	WORD	OEM software version (BCD, high byte = major, low byte = minor)
 16h	DWORD	pointer to vendor name
 1Ah	DWORD	pointer to product name
 1Eh	DWORD	pointer to product revision string
 22h	WORD	(if capabilities bit 3 set) VBE/AF version (BCD)
		0100h for v1.0P
 24h	DWORD	(if capabilities bit 3 set) pointer to list of supported
		  accelerated video modes (list of words terminated with FFFFh)
 28h 216 BYTEs	reserved for VBE implementation
100h 256 BYTEs	OEM scratchpad (for OEM strings, etc.)
Notes:	the list of supported video modes is stored in the reserved portion of
	  the SuperVGA information record by some implementations, and it may
	  thus be necessary to either copy the mode list or use a different
	  buffer for all subsequent VESA calls
	not all of the video modes in the list of mode numbers may be
	  supported, e.g. if they require more memory than currently installed
	  or are not supported by the attached monitor.	 Check any mode you
	  intend to use through AX=4F01h first.
	the 1.1 VESA document specifies 242 reserved bytes at the end, so the
	  buffer should be 262 bytes to ensure that it is not overrun; for
	  v2.0, the buffer should be 512 bytes
	the S3 specific video modes will most likely follow the FFFFh
	  terminator at the end of the standard modes.	A search must then
	  be made to find them, FFFFh will also terminate this second list
	in some cases, only a "stub" VBE may be present, supporting only
	  AX=4F00h; this case may be assumed if the list of supported video
	  modes is empty (consisting of a single word of FFFFh)

Bitfields for VESA capabilities:
Bit(s)	Description	(Table 00078)
 0	DAC can be switched into 8-bit mode
 1	non-VGA controller
 2	programmed DAC with blank bit (i.e. only during blanking interval)
 3	(VBE v3.0) controller supports hardware stereoscopic signalling
 3	controller supports VBE/AF v1.0P extensions
 4	(VBE v3.0) if bit 3 set:
	    =0 stereo signalling via external VESA stereo connector
	    =1 stereo signalling via VESA EVC connector
 4	(VBE/AF v1.0P) must call EnableDirectAccess to access framebuffer
 5	(VBE/AF v1.0P) controller supports hardware mouse cursor
 6	(VBE/AF v1.0P) controller supports hardware clipping
 7	(VBE/AF v1.0P) controller supports transparent BitBLT
 8-31	reserved (0)

INT 10 - VESA SuperVGA BIOS v2.0+ - GET/SET PALETTE ENTRIES
	AX = 4F09h
	BL = subfunction
	    00h set (primary) palette
	    01h get (primary) palette
	    02h set secondary palette data
	    03h get secondary palette data
	    80h set palette during vertical retrace
	CX = number of entries to change
	DX = starting palette index
	ES:DI -> palette buffer, array of DAC entries (see #00086)
Return: AL = 4Fh if function supported
	AH = status
	    00h successful
	    01h failed
SeeAlso: AX=4F0Ah,AX=D000h"S3VBE"

Format of VESA VBE palette entry:
Offset	Size	Description	(Table 00086)
 00h	BYTE	red
 01h	BYTE	green
 02h	BYTE	blue
 03h	BYTE	alpha or alignment byte
~
	.model	tiny
	.code
	.startup

;GET SuperVGA INFORMATION
	mov	ax, 4F00h
	lea	di, SuperVGABuffer	;ES:DI -> buffer for SuperVGA information (see #00077)
	int	10h
	cmp	ax,004fh
	jne	SuperVGA_NotFound

;GET PALETTE ENTRIES
	mov	ax, 4F09h
	mov	bl, 1			;get (primary) palette
	xor	dx, dx
	lea	di, SuperVGABuffer	;ES:DI -> buffer for RGBA
	mov	cx, 100h		;количество
	int	10h
	cmp	ax, 004fh		;проверка на корректность
	jne	SuperVGA_NoPalette

;get secondary palette data
	mov	ax, 4F09h
	mov	bl, 2			;get secondary palette data
	xor	dx, dx			;стартовый индекс
	lea	di, SuperVGABuffer	;ES:DI -> buffer for RGBA
	mov	cx, 100h		;количество
	int	10h
	cmp	ax, 004fh		;проверка на корректность
	jne	SuperVGA_NoPalette

SuperVGA_NotFound:
SuperVGA_NoPalette:
	mov	ax, 4c00h
	int	21h

SuperVGABuffer	label	byte

	end