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docs/interrupts/int-html/rb-0273.htm
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docs/interrupts/int-html/rb-0273.htm
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<HTML>
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<HEAD>
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<TITLE>Int 10/AX=4F00h
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</TITLE>
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<META NAME="Description" CONTENT="
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Int 10/AX=4F00h - VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION -
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AX = 4F00h
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ES:DI - buffer for SuperVGA information (see #00077)
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Return: AL = 4Fh if function supported
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AH = status
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00h successful
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ES:DI buffer filled
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01h failed
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---VBE v2.0---
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02h function not supported by current hardware configuration
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03h function invalid in current video mode
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">
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<META NAME="robots" CONTENT="none">
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</HEAD>
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<BODY BGCOLOR="#FFD0A0">
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<center>
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<h2>Int 10/AX=4F00h
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</h2>
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</center><p>
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<table border=1 cellpadding=3 cellspacing=1>
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<td>
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<a href="rb-0272.htm" tppabs="http://www.ctyme.com/intr/rb-0272.htm">
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<img src="lup.gif" tppabs="http://graphics.ctyme.com/gif/lup.gif" border=0 alt=Prev></a>
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<a href="rb-0274.htm" tppabs="http://www.ctyme.com/intr/rb-0274.htm">
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<img src="ldown.gif" tppabs="http://graphics.ctyme.com/gif/ldown.gif" border=0 alt=Next></a>
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<a href="javascript:if(confirm('http://www.ctyme.com/rbrown.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/rbrown.htm'" tppabs="http://www.ctyme.com/rbrown.htm">
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<img src="lhome.gif" tppabs="http://graphics.ctyme.com/gif/lhome.gif" border=0 alt=Ralf Brown Page></a>
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<td><a href="int.htm" tppabs="http://www.ctyme.com/intr/int.htm">Interrups</a></td>
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<td><a href="cat.htm" tppabs="http://www.ctyme.com/intr/cat.htm">Categories</a></td>
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<td><a href="alpha.htm" tppabs="http://www.ctyme.com/intr/alpha.htm">Contents</a></td>
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</td></table><p>
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<p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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<h3><font color=#C00040>VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION</font></h3>
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<PRE>
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AX = 4F00h
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ES:DI -> buffer for SuperVGA information <a href="rb-0273.htm#Table77" tppabs="http://www.ctyme.com/intr/rb-0273.htm#Table77">(see #00077)</a><br>
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<p><b>Return:</b><br>AL = 4Fh if function supported
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AH = status
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00h successful
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ES:DI buffer filled
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01h failed
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---VBE v2.0---
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02h function not supported by current hardware configuration
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03h function invalid in current video mode
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</PRE>
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<p><b>Desc:</b>
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Determine whether VESA BIOS extensions are present and the capabilities
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supported by the display adapter
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<p><b>See Also:</b>
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<a href="rb-0266.htm" tppabs="http://www.ctyme.com/intr/rb-0266.htm">AX=4E00h</a> - <a href="rb-0274.htm" tppabs="http://www.ctyme.com/intr/rb-0274.htm">AX=4F01h</a> - <a href="rb-0405.htm" tppabs="http://www.ctyme.com/intr/rb-0405.htm">AX=7F00h"SOLLEX"</a> - <a href="rb-0453.htm" tppabs="http://www.ctyme.com/intr/rb-0453.htm">AX=A00
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<PRE>
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<p><b>Index:</b><br>Installation check;VESA SuperVGA
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<p>
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Format of SuperVGA information:
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<a name=table77></a>
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Offset Size Description (Table 00077)
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00h 4 BYTEs (ret) signature ("VESA")
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(call) VESA 2.0 request signature ("VBE2"), required to receive
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version 2.0 info
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04h WORD VESA version number (one-digit minor version -- 0102h = v1.2)
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06h DWORD pointer to OEM name
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"761295520" for ATI
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0Ah DWORD capabilities flags <a href="rb-0273.htm#Table78" tppabs="http://www.ctyme.com/intr/rb-0273.htm#Table78">(see #00078)</a>
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0Eh DWORD pointer to list of supported VESA and OEM video modes
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(list of words terminated with FFFFh)
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12h WORD total amount of video memory in 64K blocks
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---VBE v1.x ---
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14h 236 BYTEs reserved
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---VBE v2.0 ---
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14h WORD OEM software version (BCD, high byte = major, low byte = minor)
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16h DWORD pointer to vendor name
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1Ah DWORD pointer to product name
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1Eh DWORD pointer to product revision string
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22h WORD (if capabilities bit 3 set) VBE/AF version (BCD)
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0100h for v1.0P
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24h DWORD (if capabilities bit 3 set) pointer to list of supported
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accelerated video modes (list of words terminated with FFFFh)
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28h 216 BYTEs reserved for VBE implementation
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100h 256 BYTEs OEM scratchpad (for OEM strings, etc.)
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</PRE>
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<p><b>Notes:</b>
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The list of supported video modes is stored in the reserved portion of
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the SuperVGA information record by some implementations, and it may
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thus be necessary to either copy the mode list or use a different
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buffer for all subsequent VESA calls.
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Not all of the video modes in the list of mode numbers may be
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supported, e.g. if they require more memory than currently installed
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or are not supported by the attached monitor. Check any mode you
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intend to use through AX=4F01h first..
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The 1.1 VESA document specifies 242 reserved bytes at the end, so the
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buffer should be 262 bytes to ensure that it is not overrun; for
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v2.0, the buffer should be 512 bytes.
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The S3 specific video modes will most likely follow the FFFFh
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terminator at the end of the standard modes. A search must then
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be made to find them, FFFFh will also terminate this second list.
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In some cases, only a "stub" VBE may be present, supporting only
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AX=4F00h; this case may be assumed if the list of supported video
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modes is empty (consisting of a single word of FFFFh)
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<PRE>
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<p>
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Bitfields for VESA capabilities:
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<a name=table78></a>
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Bit(s) Description (Table 00078)
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0 DAC can be switched into 8-bit mode
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1 non-VGA controller
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2 programmed DAC with blank bit (i.e. only during blanking interval)
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3 (VBE v3.0) controller supports hardware stereoscopic signalling
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3 controller supports VBE/AF v1.0P extensions
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4 (VBE v3.0) if bit 3 set:
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=0 stereo signalling via external VESA stereo connector
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=1 stereo signalling via VESA EVC connector
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4 (VBE/AF v1.0P) must call EnableDirectAccess to access framebuffer
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5 (VBE/AF v1.0P) controller supports hardware mouse cursor
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6 (VBE/AF v1.0P) controller supports hardware clipping
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7 (VBE/AF v1.0P) controller supports transparent BitBLT
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8-31 reserved (0)
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</PRE>
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<p><b>See Also:</b>
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#00077 - <a href="rb-0286.htm" tppabs="http://www.ctyme.com/intr/rb-0286.htm">AX=4F09h</a>
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<p>
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<b>Category: <a href="cat-046.htm" tppabs="http://www.ctyme.com/intr/cat-046.htm">
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Video</a>
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- <a href="int-10.htm" tppabs="http://www.ctyme.com/intr/int-10.htm">
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Int 10h</a>
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- <a href="alpha-v.htm" tppabs="http://www.ctyme.com/intr/alpha-v.htm">
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V</a>
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</b><p><p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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<table border=1 cellpadding=3 cellspacing=1>
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<td>
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<a href="rb-0272.htm" tppabs="http://www.ctyme.com/intr/rb-0272.htm">
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<img src="lup.gif" tppabs="http://graphics.ctyme.com/gif/lup.gif" border=0 alt=Prev></a>
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<a href="rb-0274.htm" tppabs="http://www.ctyme.com/intr/rb-0274.htm">
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<img src="ldown.gif" tppabs="http://graphics.ctyme.com/gif/ldown.gif" border=0 alt=Next></a>
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<a href="javascript:if(confirm('http://www.ctyme.com/rbrown.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/rbrown.htm'" tppabs="http://www.ctyme.com/rbrown.htm">
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<img src="lhome.gif" tppabs="http://graphics.ctyme.com/gif/lhome.gif" border=0 alt=Ralf Brown Page></a>
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<td><a href="int.htm" tppabs="http://www.ctyme.com/intr/int.htm">Interrups</a></td>
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<td><a href="cat.htm" tppabs="http://www.ctyme.com/intr/cat.htm">Categories</a></td>
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<td><a href="alpha.htm" tppabs="http://www.ctyme.com/intr/alpha.htm">Contents</a></td>
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</td></table><p>
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<!-- Bottom Link Start -->
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<center>
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<p><table border=1 bgcolor="#ffff99"><tr><td>
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<table border=0 height=80>
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<tr align=center><td width="65">
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<a href="javascript:if(confirm('http://www.ctyme.com/sponsor.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/sponsor.htm'" tppabs="http://www.ctyme.com/sponsor.htm">
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<img src="tip.gif" tppabs="http://graphics.ctyme.com/gif/tip.gif" ALT="Sponsors" height="40" width="40"></a>
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<br><a href="javascript:if(confirm('http://www.ctyme.com/sponsor.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/sponsor.htm'" tppabs="http://www.ctyme.com/sponsor.htm">Shopping</a>
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</td><td width="65">
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</td><td width="65">
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<img src="mail.gif" tppabs="http://graphics.ctyme.com/gif/mail.gif" ALT="email" height="40" width="40"></a>
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<br><a href="javascript:if(confirm('http://www.ctyme.com/mail.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/mail.htm'" tppabs="http://www.ctyme.com/mail.htm">EMail</a>
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</td><td width="65">
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<a href="javascript:if(confirm('http://www.ctyme.com/map.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/map.htm'" tppabs="http://www.ctyme.com/map.htm">
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<img src="toc.gif" tppabs="http://graphics.ctyme.com/gif/toc.gif" ALT="Index" height="40" width="40"></a>
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<br><a href="javascript:if(confirm('http://www.ctyme.com/map.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/map.htm'" tppabs="http://www.ctyme.com/map.htm">Index</a>
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</td><td width="65">
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<a href="javascript:if(confirm('http://www.ctyme.com/ \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/'" tppabs="http://www.ctyme.com/">
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<img src="home.gif" tppabs="http://graphics.ctyme.com/gif/home.gif" ALT="Home" height="40" width="40"></a>
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<br><a href="javascript:if(confirm('http://www.ctyme.com/ \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/'" tppabs="http://www.ctyme.com/">Home</a>
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</td><td width="90">
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<center>
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<FORM ACTION="https://secure.paypal.com/cgi-bin/webscr" tppabs="https://secure.paypal.com/cgi-bin/webscr" METHOD="POST" traget="_blank">
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<INPUT TYPE="hidden" NAME="cmd" VALUE="_xclick">
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<INPUT TYPE="hidden" NAME="business" VALUE="marc@perkel.com">
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<INPUT TYPE="hidden" NAME="return" VALUE="http://www.perkel.com">
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<INPUT TYPE="hidden" NAME="item_name" VALUE="Donation To Support this Site">
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<INPUT TYPE="hidden" NAME="no_intl" VALUE="1">
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<INPUT TYPE="image" SRC="x-click-but7.gif" tppabs="http://images.paypal.com/images/x-click-but7.gif" vspace=9
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NAME="submit" ALT="Make payments with PayPal - it's fast, free and secure!">
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</FORM>
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</td></tr></table></td></tr></table><p>
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<center>
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<p>
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<a href="javascript:if(confirm('http://www.ctyme.com/hosting/index.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/hosting/index.htm'" tppabs="http://www.ctyme.com/hosting/index.htm" target="_blank">
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<img src="ctymehost.gif" tppabs="http://graphics.ctyme.com/gif/ctymehost.gif"
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border=3 height=60 width=468></a>
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<p>
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<!-- Ad End --->
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</center>
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<FORM ACTION="http://service.bfast.com/bfast/click" target="_blank">
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<INPUT TYPE="hidden" NAME="siteid" VALUE="30472466" >
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<INPUT TYPE="hidden" NAME="bfpage" VALUE="horizontal">
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<INPUT TYPE="hidden" NAME="bfmid" VALUE="27253343" >
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<INPUT TYPE="hidden" NAME="num" VALUE="30">
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<table bgcolor=white border=3><tr><td>
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||||
<table bgcolor=white border=0>
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||||
<tr><td>
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||||
<IMG SRC="serve-bfmid=27253343&siteid=30472466&bfpage=horizontal.gif" tppabs="http://service.bfast.com/bfast/serve?bfmid=27253343&siteid=30472466&bfpage=horizontal" BORDER="0" WIDTH="1" HEIGHT="1" align=right NOSAVE >
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<center><b>Search the web with Google</b></center>
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</td></tr><tr><td>
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||||
<TABLE cellpadding=0 cellspacing=5 bgcolor="#FFFFFF">
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<tr><td bgcolor="#0000cc"><IMG SRC="cleardot.gif" tppabs="http://www.google.com/images/cleardot.gif" height=1 border="0" ALT="Google"></td></tr><tr><td>
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<IMG SRC="affiliate_logo.gif" tppabs="http://www.google.com/affiliates/affiliate_logo.gif" border="0" ALT="Google" align="center">
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<INPUT TYPE=text name=q size=30 maxlength=255 value="">
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||||
<INPUT type=submit name=sa VALUE="Go">
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||||
</td></tr>
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||||
<tr><td bgcolor="#0000cc"><IMG SRC="cleardot.gif" tppabs="http://www.google.com/images/cleardot.gif" height=1 border="0" ALT="Google"></td></tr></TABLE>
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</td></tr></table>
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</tr></td></table>
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</FORM>
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</center>
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<p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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</BODY>
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</HTML>
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