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/*
* This file is part of atitvout.
*
* asd is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* asd is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with atitvout; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <stdio.h>
#include <string.h>
#include <lrmi.h>
#include <vbe.h>
#include "vbeinfo.h"
int vbe_info(int *vh, int *vl, char *oe, int s) {
struct LRMI_regs r;
struct vbe_info_block *vib;
if (!(vib = LRMI_alloc_real(sizeof(struct vbe_info_block)))) {
fprintf(stderr, "Can't alloc real mode memory.\n");
return -1;
}
memset(&r, 0, sizeof(r));
r.eax = 0x4f00;
r.es = (unsigned int) vib >> 4;
r.edi = 0;
memcpy(vib->vbe_signature, "VBE2", 4);
if (!LRMI_int(0x10, &r)) {
fprintf(stderr, "Can't get VESA info (vm86 failure)\n");
LRMI_free_real(vib);
return -2;
}
if ((r.eax & 0xffff) != 0x4f || strncmp(vib->vbe_signature, "VESA", 4) != 0) {
fprintf(stderr, "No VESA bios\n");
LRMI_free_real(vib);
return -3;
}
if (vh)
*vh = (vib->vbe_version >> 8) & 0xff;
if (vl)
*vl = vib->vbe_version & 0xff;
if (oe && s) {
int i;
if (s > sizeof(vib->oem_data))
s = sizeof(vib->oem_data);
for (i = 0; i < s; i++)
if (vib->oem_data[i] >= ' ' && vib->oem_data[i] < 127)
oe[i] = vib->oem_data[i];
else {
oe[i] = 0;
break;
}
}
LRMI_free_real(vib);
return 0;
}
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