add: if (si->ps.card_arch == NV40A) DACW(CURPOS, (DACR(CURPOS)));
context: status_t nv_crtc_cursor_hide(){	LOG(4,("CRTC: disabling cursor\n"));	/* enable access to primary head */	set_crtc_owner(0);	/* b0 = 0 disables cursor */	CRTCW(CURCTL0, (CRTCR(CURCTL0) & 0xfe));	return B_OK;}