VGA_ATC_COLOR_PAGE
vga_wattr(cinfo->regbase, VGA_ATC_COLOR_PAGE, 0x00);
svga_wattr(regbase, VGA_ATC_COLOR_PAGE, 0x00);
par->atc[VGA_ATC_COLOR_PAGE] = 0x00;
atc[VGA_ATC_COLOR_PAGE] = 0x00;