diff options
Diffstat (limited to 'src/mame/drivers/vastar.c')
-rw-r--r-- | src/mame/drivers/vastar.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/src/mame/drivers/vastar.c b/src/mame/drivers/vastar.c index 78775cc630b..8ed50a62e7b 100644 --- a/src/mame/drivers/vastar.c +++ b/src/mame/drivers/vastar.c @@ -75,10 +75,7 @@ static MACHINE_RESET( vastar ) static WRITE8_HANDLER( vastar_hold_cpu2_w ) { /* I'm not sure that this works exactly like this */ - if (data & 1) - cputag_set_input_line(space->machine(), "sub", INPUT_LINE_RESET, CLEAR_LINE); - else - cputag_set_input_line(space->machine(), "sub", INPUT_LINE_RESET, ASSERT_LINE); + cputag_set_input_line(space->machine(), "sub", INPUT_LINE_RESET, (data & 1) ? CLEAR_LINE : ASSERT_LINE); } static READ8_HANDLER( vastar_sharedram_r ) @@ -100,6 +97,12 @@ static WRITE8_HANDLER( flip_screen_w ) flip_screen_set(space->machine(), data); } +static WRITE8_HANDLER( nmi_mask_w ) +{ + vastar_state *state = space->machine().driver_data<vastar_state>(); + + state->m_nmi_mask = data & 1; +} static ADDRESS_MAP_START( main_map, AS_PROGRAM, 8 ) @@ -124,7 +127,7 @@ ADDRESS_MAP_END static ADDRESS_MAP_START( main_port_map, AS_IO, 8 ) ADDRESS_MAP_GLOBAL_MASK(0xff) - AM_RANGE(0x00, 0x00) AM_WRITE(interrupt_enable_w) + AM_RANGE(0x00, 0x00) AM_WRITE(nmi_mask_w) AM_RANGE(0x01, 0x01) AM_WRITE(flip_screen_w) AM_RANGE(0x02, 0x02) AM_WRITE(vastar_hold_cpu2_w) ADDRESS_MAP_END @@ -289,7 +292,13 @@ static const ay8910_interface ay8910_config = DEVCB_NULL }; +static INTERRUPT_GEN( vblank_irq ) +{ + vastar_state *state = device->machine().driver_data<vastar_state>(); + if(state->m_nmi_mask) + device_set_input_line(device, INPUT_LINE_NMI, PULSE_LINE); +} static MACHINE_CONFIG_START( vastar, vastar_state ) @@ -297,7 +306,7 @@ static MACHINE_CONFIG_START( vastar, vastar_state ) MCFG_CPU_ADD("maincpu", Z80, 3072000) /* 3.072 MHz ???? */ MCFG_CPU_PROGRAM_MAP(main_map) MCFG_CPU_IO_MAP(main_port_map) - MCFG_CPU_VBLANK_INT("screen", nmi_line_pulse) + MCFG_CPU_VBLANK_INT("screen", vblank_irq) MCFG_CPU_ADD("sub", Z80, 3072000) /* 3.072 MHz ???? */ MCFG_CPU_PROGRAM_MAP(cpu2_map) |