Specifications

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D:\D\inter61a\INTERRUP.A Saturday, January 08, 2011 11:31 AM

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

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http://www.foxitsoftware.com For evaluation only.