diff options
Diffstat (limited to 'src/mame/drivers/m63.c')
-rw-r--r-- | src/mame/drivers/m63.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/src/mame/drivers/m63.c b/src/mame/drivers/m63.c index 743b87cf93e..fcda7760651 100644 --- a/src/mame/drivers/m63.c +++ b/src/mame/drivers/m63.c @@ -134,6 +134,8 @@ public: UINT8 * m_scrollram; size_t m_spriteram_size; + UINT8 m_nmi_mask; + /* video-related */ tilemap_t *m_bg_tilemap; tilemap_t *m_fg_tilemap; @@ -434,6 +436,14 @@ static WRITE8_HANDLER( fghtbskt_samples_w ) sample_start_raw(state->m_samples, 0, state->m_samplebuf + ((data & 0xf0) << 8), 0x2000, 8000, 0); } +static WRITE8_HANDLER( nmi_mask_w ) +{ + m63_state *state = space->machine().driver_data<m63_state>(); + + state->m_nmi_mask = data & 1; +} + + static ADDRESS_MAP_START( m63_map, AS_PROGRAM, 8 ) AM_RANGE(0x0000, 0xbfff) AM_ROM AM_RANGE(0xd000, 0xdfff) AM_RAM @@ -443,7 +453,7 @@ static ADDRESS_MAP_START( m63_map, AS_PROGRAM, 8 ) AM_RANGE(0xe400, 0xe7ff) AM_RAM_WRITE(m63_videoram2_w) AM_BASE_MEMBER(m63_state, m_videoram2) AM_RANGE(0xe800, 0xebff) AM_RAM_WRITE(m63_videoram_w) AM_BASE_MEMBER(m63_state, m_videoram) AM_RANGE(0xec00, 0xefff) AM_RAM_WRITE(m63_colorram_w) AM_BASE_MEMBER(m63_state, m_colorram) - AM_RANGE(0xf000, 0xf000) AM_WRITE(interrupt_enable_w) /* NMI enable */ + AM_RANGE(0xf000, 0xf000) AM_WRITE(nmi_mask_w) AM_RANGE(0xf002, 0xf002) AM_WRITE(m63_flipscreen_w) AM_RANGE(0xf003, 0xf003) AM_WRITE(m63_palbank_w) AM_RANGE(0xf006, 0xf007) AM_WRITE(coin_w) @@ -472,7 +482,7 @@ static ADDRESS_MAP_START( fghtbskt_map, AS_PROGRAM, 8 ) AM_RANGE(0xf001, 0xf001) AM_WRITENOP AM_RANGE(0xf002, 0xf002) AM_WRITE(soundlatch_w) AM_RANGE(0xf800, 0xf800) AM_WRITENOP - AM_RANGE(0xf801, 0xf801) AM_WRITE(interrupt_enable_w) + AM_RANGE(0xf801, 0xf801) AM_WRITE(nmi_mask_w) AM_RANGE(0xf802, 0xf802) AM_WRITE(fghtbskt_flipscreen_w) AM_RANGE(0xf803, 0xf803) AM_WRITENOP AM_RANGE(0xf804, 0xf804) AM_WRITENOP @@ -734,12 +744,21 @@ static MACHINE_RESET( m63 ) state->m_p2 = 0; } + +static INTERRUPT_GEN( vblank_irq ) +{ + m63_state *state = device->machine().driver_data<m63_state>(); + + if(state->m_nmi_mask) + device_set_input_line(device, INPUT_LINE_NMI, PULSE_LINE); +} + static MACHINE_CONFIG_START( m63, m63_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",Z80,XTAL_12MHz/4) /* 3 MHz */ MCFG_CPU_PROGRAM_MAP(m63_map) - MCFG_CPU_VBLANK_INT("screen", nmi_line_pulse) + MCFG_CPU_VBLANK_INT("screen", vblank_irq) MCFG_CPU_ADD("soundcpu",I8039,XTAL_12MHz/4) /* ????? */ MCFG_CPU_PROGRAM_MAP(i8039_map) |