_go32_info_block.size_of_transfer_buffer

I have been going through a few graphics tutorials which I found @ http://www-scf.usc.edu/~akotaobi.

If you have done the same tuts, then maybe you can help me.

I have aproblem with the following function in that it always fails because the sizeof(inf) is always less than _go32_info_block.size_of_transfer_buffer.

Code:

void get_svga_modeinfo (int mode, modeinfo& inf) {

    // Retrieve data for the screenmode and stuff it in the modeinfo struct.
    __dpmi_regs r;
    assert(sizeof(inf) < _go32_info_block.size_of_transfer_buffer);

    r.x.ax = 0x4F01; // Mode info retrieval function.
    r.x.cx = mode;
    r.x.di = __tb & 0x0F;
    r.x.es = (__tb >> 4) & 0xFFFF;
    __dpmi_int(0x10, &r);

    dosmemget(__tb, sizeof(inf), &inf);

    // Save some info to avoid redundant calculations.
    
    maxx = inf.XResolution;
    maxy = inf.YResolution;
    bits_per_pixel = inf.BitsPerPixel;
    bytes_per_pixel = bits_per_pixel * 8;
    wingranularity = inf.WinGranularity;
}

I printed the values for both and this is what I get :
sizeof( inf ) = 256
_go32_info_block.size_of_transfer_buffer = 16384

What could it be?

_go32_info_block.size_of_transfer_buffer

hmm...i dont know whats wrong...but i do know this....that is one horrible variable name....