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badlands.cpp: Convert bootleg to mimic irq 0 sound generation (nw)

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This commit is contained in:
angelosa 2017-05-04 02:06:07 +02:00
parent 0ef66145dc
commit 31eb45b86e
2 changed files with 14 additions and 4 deletions
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17
src/mame/drivers/badlands.cpp
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@ -652,7 +652,6 @@ WRITE8_MEMBER(badlands_state::bootleg_shared_w)
m_b_sharedram[offset] = data;
}
static ADDRESS_MAP_START( bootleg_map, AS_PROGRAM, 16, badlands_state )
AM_RANGE(0x000000, 0x03ffff) AM_ROM
@ -660,7 +659,7 @@ static ADDRESS_MAP_START( bootleg_map, AS_PROGRAM, 16, badlands_state )
AM_RANGE(0x400000, 0x401fff) AM_READWRITE8(bootleg_shared_r,bootleg_shared_w,0xffff)
AM_RANGE(0xfc0000, 0xfc0001) AM_READ(badlandsb_unk_r ) // sound comms?
AM_RANGE(0xfd0000, 0xfd1fff) AM_DEVREADWRITE8("eeprom", atari_eeprom_device, read, write, 0x00ff)
//AM_RANGE(0xfe0000, 0xfe1fff) AM_DEVWRITE("watchdog", watchdog_timer_device, reset_w)
AM_RANGE(0xfe2000, 0xfe3fff) AM_WRITE(video_int_ack_w)
@ -744,6 +743,16 @@ MACHINE_RESET_MEMBER(badlands_state,badlandsb)
// memcpy(m_bank_base, &m_bank_source_data[0x0000], 0x1000);
}
TIMER_DEVICE_CALLBACK_MEMBER(badlands_state::bootleg_sound_scanline)
{
int scanline = param;
//address_space &space = m_audiocpu->space(AS_PROGRAM);
// 32V
if ((scanline % 64) == 0 && scanline < 240)
m_audiocpu->set_input_line(0, HOLD_LINE);
}
static MACHINE_CONFIG_START( badlandsb, badlands_state )
/* basic machine hardware */
@ -751,9 +760,9 @@ static MACHINE_CONFIG_START( badlandsb, badlands_state )
MCFG_CPU_PROGRAM_MAP(bootleg_map)
MCFG_CPU_VBLANK_INT_DRIVER("screen", badlands_state, irq1_line_hold) //vblank_int)
MCFG_CPU_ADD("soundcpu", Z80, XTAL_20MHz/12) /* Divisor estimated */
MCFG_CPU_ADD("audiocpu", Z80, XTAL_20MHz/12) /* Divisor estimated */
MCFG_CPU_PROGRAM_MAP(bootleg_audio_map)
MCFG_CPU_VBLANK_INT_DRIVER("screen", badlands_state, irq0_line_hold) // TODO: maybe triggered by main CPU instead of periodic timer
MCFG_TIMER_DRIVER_ADD_SCANLINE("scantimer", badlands_state, bootleg_sound_scanline, "screen", 0, 1)
MCFG_MACHINE_START_OVERRIDE(badlands_state,badlands)
MCFG_MACHINE_RESET_OVERRIDE(badlands_state,badlandsb)

1
src/mame/includes/badlands.h
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@ -48,6 +48,7 @@ public:
uint32_t screen_update_badlands(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
INTERRUPT_GEN_MEMBER(vblank_int);
TIMER_DEVICE_CALLBACK_MEMBER(sound_scanline);
TIMER_DEVICE_CALLBACK_MEMBER(bootleg_sound_scanline);
DECLARE_WRITE16_MEMBER( badlands_pf_bank_w );
DECLARE_READ8_MEMBER(bootleg_shared_r);
DECLARE_WRITE8_MEMBER(bootleg_shared_w);