Message-ID: <383F3F37.A9AA4946@interlog.com>
From: Alan Illeman <illeman AT interlog DOT com>
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Subject: VBE links in djgppfaq ??
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Date: Fri, 26 Nov 1999 21:17:27 -0500
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

In section 10.2 of the djgppfaq, there are 3 links re:VBE..

ftp.neosoft.com/pub/users/s/sandmann
www.tr66.com/~brennan/djgpp/vbe.zip
breenan.home.ml.org/djgpp

..but none of them exist.

Can someone help with converting this code for djgpp ??

BOOL GetVgaInfo(VGAINFO *vgainfo)
{
    union REGS ir, or;
    struct SREGS sr;

    ir.x.ax = GET_VESA_VGA_INFO;
    ir.x.di = FP_OFF(vgainfo);
    sr.es   = FP_SEG(vgainfo);
    int86x(0x10, &ir, &or, &sr);
    if(or.h.ah == 1 || or.h.al != 0x4F)
        return FALSE;

    return TRUE;
}

If I understand the faq correctly, djgpp packs structures automatically
and so I should allocate a char buffer below the 1 Mb limit and use
the ansi macro "offsetof" to access the members..
#define offsetof(s_type,mbr) ((size_t) &((s_type*)0)->mbr)

Can't I just use pragmas instead ??

#pragma pack(1)
typedef struct {
 ...
}VGAINFO;
#pragma pack(0)

Thanks.

Alan