diff --git a/src/emu/bus/intv/ecs.c b/src/emu/bus/intv/ecs.c
index 4400b5e8839..d9146a73495 100644
--- a/src/emu/bus/intv/ecs.c
+++ b/src/emu/bus/intv/ecs.c
@@ -151,7 +151,7 @@ UINT8 intv_ecs_device::intv_control_r(int hand)
 			}
 			break;
 
-		case 1: /* disc == _fake_ analog */
+		case 4: /* disc == _fake_ analog */
 
 			x = m_discx[hand]->read();
 			y = m_discy[hand]->read();
diff --git a/src/mess/video/nes.c b/src/mess/video/nes.c
index 64cb116df1e..0105c740e2b 100644
--- a/src/mess/video/nes.c
+++ b/src/mess/video/nes.c
@@ -50,7 +50,7 @@ UINT32 nes_state::screen_update_nes(screen_device &screen, bitmap_ind16 &bitmap,
 			m_last_frame_flip = 1;
 		}
 
-		if (!m_io_disksel->read_safe(1) & 0x01)
+		if (!(m_io_disksel->read_safe(1) & 0x01))
 			m_last_frame_flip = 0;
 	}
 	return 0;