From:	beyonddeath <justhunt1234 AT home DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: hmm can someone help me with VESA
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Date:	Sun, 02 Apr 2000 15:46:49 GMT
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I dont meain to say your wrong but it does work heh  if you look in
the book c faqs he says exactly that code snippet that im using which
does work for 117 but when i do it it does not work which is quite
strange....

i can try these numbers and get back to  you if you want...	


On Sat, 01 Apr 2000 19:18:02 GMT, "AndrewJ" <luminous-is AT home DOT com>
wrote:

>> this works without 0x0 but not in my program if i make a program that
>> starts up into that mode then getch(); then closes works fine but in
>> mine it doesnt make the change...
>
>Well, I always hate to argue with people, but...
>
>This is cut 'n pasted from Ralf Brown's Interrupt List:
>
>(Table 00083)
>Values for VESA video mode:
> 00h-FFh OEM video modes (see #00010 at AH=00h) //// AKA STANDARD BIOS MODES
> 100h 640x400x256
> 101h 640x480x256
> 102h 800x600x16
> 103h 800x600x256
> 104h 1024x768x16
> 105h 1024x768x256
> 106h 1280x1024x16
> 107h 1280x1024x256
> 108h 80x60 text
> 109h 132x25 text
> 10Ah 132x43 text
> 10Bh 132x50 text
> 10Ch 132x60 text
>---VBE v1.2---
> 10Dh 320x200x32K
> 10Eh 320x200x64K
> 10Fh 320x200x16M
> 110h 640x480x32K
> 111h 640x480x64K
> 112h 640x480x16M
> 113h 800x600x32K
> 114h 800x600x64K
> 115h 800x600x16M
> 116h 1024x768x32K
> 117h 1024x768x64K
> 118h 1024x768x16M
> 119h 1280x1024x32K
> 11Ah 1280x1024x64K
> 11Bh 1280x1024x16M
>---VBE 2.0---
> 120h 1600x1200x256
> 121h 1600x1200x32K
> 122h 1600x1200x64K
>81FFh special full-memory access mode
>
>Now if we look at this and find 117 (which is 75h in base-16/hexadecimal), we
>see that this isn't even a VBE mode.  But if we look at 117h (aka in C parlance
>0x117) then it is the mode you are looking for!  So you are wrong, sir.  All
>VBE modes have a value of greater than or equal to 0x100 (256 in decimal)!
>
>Either use:
>
>regs.x.bx = 0x117; /* using hex */
>-or-
>regs.x.bx = 279; /* using decimal */
>
>If you still don't understand what I am saying, then the only thing I can
>suggest is that you either brush up on your knowledge of the VBE specification,
>or study how decimal and hexadecimal work.
>
>AndrewJ
>

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