Int 10 Fn 4F00  - Vesa Supervga Bios (vbe) - Get Supervga Information      [V]

   AX = 4F00h
   ES:DI -> buffer for SuperVGA information (see #0075)

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

See Also: AX=4E00h,AX=4F01h,AX=7F00h"SOLLEX",AX=A00Ch
Index: installation check;VESA SuperVGA

Format of SuperVGA information:
Offset Size    Description (Table 0075)
 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)
 06h   DWORD   pointer to OEM name
       "761295520" for ATI
 0Ah   DWORD   capabilities flags (see #0076)
 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
 16h   DWORD   pointer to vendor name
 1Ah   DWORD   pointer to product name
 1Eh   DWORD   pointer to product revision string
 22h 222 BYTEs reserved
100h 256 BYTEs OEM scratchpad

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
   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

Bitfields for VESA capabilities:
Bit(s) Description (Table 0076)
 0 DAC can be switched into 8-bit mode
 1 non-VGA controller
 2 programmed DAC with blank bit
 3-31  reserved

See Also: #0075