diff --git a/hash/abc80_flop.xml b/hash/abc80_flop.xml
index eee09a7527e..53427fe6840 100644
--- a/hash/abc80_flop.xml
+++ b/hash/abc80_flop.xml
@@ -75,10 +75,11 @@
 		<description>ABCDemo</description>
 		<year>2015</year>
 		<publisher>Genesis Project</publisher>
+		<info name="usage" value="RUN&quot;A.B&quot;" />
 
 		<part name="flop1" interface="floppy_5_25">
 			<dataarea name="flop" size="163840">
-				<rom name="genesisproject_abcdemo.dsk" size="163840" crc="29059d3c" sha1="55b38436a2d3cfe1caf8e35e44775402a1511eec" offset="0" />
+				<rom name="genesisproject_abcdemo.dsk" size="163840" crc="667459a0" sha1="ade6420c75a27840f5308fb588ba381ec5f527ea" offset="0" />
 			</dataarea>
 		</part>
 	</software>
diff --git a/src/mess/drivers/abc80.c b/src/mess/drivers/abc80.c
index 686ae144b8d..3bafffb10fc 100644
--- a/src/mess/drivers/abc80.c
+++ b/src/mess/drivers/abc80.c
@@ -442,10 +442,12 @@ void abc80_state::device_timer(emu_timer &timer, device_timer_id id, int param,
 		break;
 
 	case TIMER_ID_VSYNC_ON:
+		if (LOG) logerror("%s vsync 1\n", machine().time().as_string());
 		m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
 		break;
 
 	case TIMER_ID_VSYNC_OFF:
+		if (LOG) logerror("%s vsync 0\n", machine().time().as_string());
 		m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
 		break;
 
@@ -560,7 +562,7 @@ static MACHINE_CONFIG_START( abc80, abc80_state )
 	MCFG_DEVICE_ADD(KEYBOARD_TAG, GENERIC_KEYBOARD, 0)
 	MCFG_GENERIC_KEYBOARD_CB(WRITE8(abc80_state, kbd_w))
 
-	MCFG_QUICKLOAD_ADD("quickload", abc80_state, bac, "bac", 1)
+	MCFG_QUICKLOAD_ADD("quickload", abc80_state, bac, "bac", 2)
 
 	// internal ram
 	MCFG_RAM_ADD(RAM_TAG)
diff --git a/src/mess/video/abc80.c b/src/mess/video/abc80.c
index 681bfc88b81..66212688466 100644
--- a/src/mess/video/abc80.c
+++ b/src/mess/video/abc80.c
@@ -175,7 +175,7 @@ void abc80_state::video_start()
 	m_vsync_on_timer->adjust(screen->time_until_pos(0, 0), 0, screen->frame_period());
 
 	m_vsync_off_timer = timer_alloc(TIMER_ID_VSYNC_OFF);
-	m_vsync_on_timer->adjust(screen->time_until_pos(16, 0), 0, screen->frame_period());
+	m_vsync_off_timer->adjust(screen->time_until_pos(16, 0), 0, screen->frame_period());
 
 	// allocate memory
 	m_video_ram.allocate(0x400);