Xref: news2.mv.net comp.os.msdos.djgpp:3678
From: Roland Exler <R DOT Exler AT jk DOT uni-linz DOT ac DOT at>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: more sizeof questions
Date: Fri, 10 May 1996 07:50:57 -0700
Organization: Institute for el. Measurement, University of Linz, Austria
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Message-ID: <319357D1.9FD@jk.uni-linz.ac.at>
References: <199605090048 DOT UAA09442 AT eelab DOT newpaltz DOT edu>
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To: djgpp AT delorie DOT com
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John Fortin wrote:
> typedef unsigned char           BYTE;
> typedef unsigned short  WORD;
> typedef unsigned long           DWORD;
> 
> typedef struct
> {
>     DWORD       VESASignature;                  4
>     WORD        VESAVersion;                            2
>     DWORD       OEMStringPointer;               4
>     DWORD       Capabilities;                   4
>     DWORD       VideoModePointer;               4
>     WORD        TotalMemory;                    2
>     BYTE        Info[236];                                      236
> }       _VGAInfoBlock;                             =      256 bytes
> 
> John E. Fortin
> fortin44 AT eelab DOT newpaltz DOT edu

Each element of the structure will be aligned, so 2 bytes will be padded after 
VESAVersion and 2 after TotalMemory which gives 260 instead of 256!

Try  __attribute__ ((packed)) or #pragma pack(1) as some previous posts has 
shown.

Roland

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