VGA_ATC_MODE
vga_wattr(cinfo->regbase, VGA_ATC_MODE, 0x01);
svga_wattr(regbase, VGA_ATC_MODE, 0x01);
par->atc[VGA_ATC_MODE] = 0x81;
atc[VGA_ATC_MODE] = 0x04;
atc[VGA_ATC_MODE] = 0x41;
atc[VGA_ATC_MODE] = 0x81;