static int setmode(int mode, int prv_mode)
{
unsigned char *moderegs;
ModeTiming *modetiming;
ModeInfo *modeinfo;
int i;
if (!modeavailable(mode))
return 1;
modeinfo = __svgalib_createModeInfoStructureForSvgalibMode(mode);
modetiming = malloc(sizeof(ModeTiming));
if (__svgalib_getmodetiming(modetiming, modeinfo, cardspecs)) {
free(modetiming);
free(modeinfo);
return 1;
}
moderegs = malloc(TOTAL_REGS);
initializemode(moderegs, modetiming, modeinfo, mode);
free(modetiming);
__svgalib_setregs(moderegs); /* Set standard regs. */
setregs(moderegs, mode); /* Set extended regs. */
free(moderegs);
free(modeinfo);
return 0;
}
static void setregs(const unsigned char regs[], int mode)
{
/* Enable graphics register modification */
port_out(0x00, GRA_E0);
port_out(0x01, GRA_E1);
__svgalib_setregs(regs);
}
static int tvga8900_setmode(int mode, int prv_mode)
{
const unsigned char *regs;
regs = LOOKUPMODE(tvga_modes, mode);
if (regs == NULL)
return (int) (__svgalib_vga_driverspecs.setmode(mode, prv_mode));
if (!tvga8900_modeavailable(mode))
return 1;
__svgalib_setregs(regs);
tvga8900_setregs(regs, mode);
return 0;
}