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pbaction: Use CTC to provide interrupts for sound CPU

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This commit is contained in:
AJR 2018-04-09 09:05:30 -04:00
parent 596d00fd24
commit 3b0675f76f
2 changed files with 72 additions and 19 deletions
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80
src/mame/drivers/pbaction.cpp
View File

@ -78,12 +78,20 @@ Stephh's notes (based on the game Z80 code and some tests) :
WRITE8_MEMBER(pbaction_state::pbaction_sh_command_w)
{
m_soundlatch->write(space, offset, data);
m_audiocpu->set_input_line_and_vector(0, HOLD_LINE, 0x00);
machine().scheduler().synchronize(timer_expired_delegate(FUNC(pbaction_state::sound_trigger), this));
}
TIMER_CALLBACK_MEMBER(pbaction_state::sound_trigger)
{
m_ctc->trg0(0);
m_ctc->trg0(1);
}
WRITE8_MEMBER(pbaction_state::nmi_mask_w)
{
m_nmi_mask = data & 1;
if (!m_nmi_mask)
m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
}
void pbaction_state::pbaction_map(address_map &map)
@ -111,18 +119,39 @@ void pbaction_state::decrypted_opcodes_map(address_map &map)
map(0x8000, 0xbfff).rom().region("maincpu", 0x8000);
}
READ8_MEMBER(pbaction_state::sound_data_r)
{
if (!machine().side_effects_disabled())
m_audiocpu->set_input_line(0, CLEAR_LINE);
return m_soundlatch->read(space, 0);
}
WRITE8_MEMBER(pbaction_state::sound_irq_ack_w)
{
m_audiocpu->set_input_line(0, CLEAR_LINE);
machine().scheduler().synchronize();
}
void pbaction_state::pbaction_sound_map(address_map &map)
{
map(0x0000, 0x1fff).rom();
map(0x4000, 0x47ff).ram();
map(0x8000, 0x8000).r(m_soundlatch, FUNC(generic_latch_8_device::read));
map(0xffff, 0xffff).nopw(); /* watchdog? */
map(0x8000, 0x8000).r(this, FUNC(pbaction_state::sound_data_r));
map(0xffff, 0xffff).w(this, FUNC(pbaction_state::sound_irq_ack_w));
}
void pbaction_state::pbaction2_sound_map(address_map &map)
{
map(0x0000, 0x1fff).rom();
map(0x4000, 0x47ff).ram();
map(0x8000, 0x8000).r("soundlatch", FUNC(generic_latch_8_device::read));
}
void pbaction_state::pbaction_sound_io_map(address_map &map)
{
map.global_mask(0xff);
map(0x00, 0x03).rw("ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write));
map(0x10, 0x11).w("ay1", FUNC(ay8910_device::address_data_w));
map(0x20, 0x21).w("ay2", FUNC(ay8910_device::address_data_w));
map(0x30, 0x31).w("ay3", FUNC(ay8910_device::address_data_w));
@ -261,12 +290,6 @@ static GFXDECODE_START( pbaction )
GFXDECODE_END
INTERRUPT_GEN_MEMBER(pbaction_state::pbaction_interrupt)
{
device.execute().set_input_line_and_vector(0, HOLD_LINE, 0x02); /* the CPU is in Interrupt Mode 2 */
}
void pbaction_state::machine_start()
{
save_item(NAME(m_nmi_mask));
@ -277,27 +300,40 @@ void pbaction_state::machine_reset()
{
m_nmi_mask = 0;
m_scroll = 0;
m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
}
INTERRUPT_GEN_MEMBER(pbaction_state::vblank_irq)
WRITE_LINE_MEMBER(pbaction_state::vblank_irq)
{
if(m_nmi_mask)
device.execute().set_input_line(INPUT_LINE_NMI, PULSE_LINE);
if (state && m_nmi_mask)
m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
}
WRITE_LINE_MEMBER(pbaction_state::sound_irq_clear)
{
if (state)
m_audiocpu->set_input_line(0, CLEAR_LINE);
}
static const z80_daisy_config daisy_chain[] =
{
{ "ctc" },
{ nullptr }
};
MACHINE_CONFIG_START(pbaction_state::pbaction)
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", Z80, 4000000) /* 4 MHz? */
MCFG_CPU_PROGRAM_MAP(pbaction_map)
MCFG_CPU_VBLANK_INT_DRIVER("screen", pbaction_state, vblank_irq)
MCFG_CPU_ADD("audiocpu", Z80, 3072000)
MCFG_CPU_PROGRAM_MAP(pbaction_sound_map)
MCFG_CPU_IO_MAP(pbaction_sound_io_map)
MCFG_CPU_PERIODIC_INT_DRIVER(pbaction_state, pbaction_interrupt, 2*60) /* ??? */
/* IRQs are caused by the main CPU */
MCFG_Z80_DAISY_CHAIN(daisy_chain)
MCFG_DEVICE_ADD("ctc", Z80CTC, 3072000)
MCFG_Z80CTC_INTR_CB(ASSERTLINE("audiocpu", 0))
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
@ -307,6 +343,7 @@ MACHINE_CONFIG_START(pbaction_state::pbaction)
MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
MCFG_SCREEN_UPDATE_DRIVER(pbaction_state, screen_update_pbaction)
MCFG_SCREEN_PALETTE("palette")
MCFG_SCREEN_VBLANK_CALLBACK(WRITELINE(pbaction_state, vblank_irq))
MCFG_GFXDECODE_ADD("gfxdecode", "palette", pbaction)
MCFG_PALETTE_ADD("palette", 256)
@ -327,11 +364,18 @@ MACHINE_CONFIG_START(pbaction_state::pbaction)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
MACHINE_CONFIG_END
MACHINE_CONFIG_START(pbaction_state::pbactionx)
MACHINE_CONFIG_START(pbaction_state::pbaction2)
pbaction(config);
MCFG_DEVICE_MODIFY("audiocpu")
MCFG_CPU_PROGRAM_MAP(pbaction2_sound_map)
MCFG_Z80_SET_IRQACK_CALLBACK(WRITELINE(pbaction_state, sound_irq_clear))
MACHINE_CONFIG_END
MACHINE_CONFIG_START(pbaction_state::pbactionx)
pbaction2(config);
MCFG_CPU_REPLACE("maincpu", SEGA_CPU_PBACTIO4, 4000000) /* 4 MHz? */
MCFG_CPU_PROGRAM_MAP(pbaction_map)
MCFG_CPU_VBLANK_INT_DRIVER("screen", pbaction_state, vblank_irq)
MCFG_CPU_OPCODES_MAP(decrypted_opcodes_map)
MCFG_SEGACRPT_SET_DECRYPTED_TAG(":decrypted_opcodes")
MACHINE_CONFIG_END
@ -510,7 +554,7 @@ DRIVER_INIT_MEMBER(pbaction_state,pbactio3)
GAME( 1985, pbaction, 0, pbaction, pbaction, pbaction_state, 0, ROT90, "Tehkan", "Pinball Action (set 1)", MACHINE_SUPPORTS_SAVE )
GAME( 1985, pbaction2, pbaction, pbaction, pbaction, pbaction_state, 0, ROT90, "Tehkan", "Pinball Action (set 2)", MACHINE_SUPPORTS_SAVE )
GAME( 1985, pbaction2, pbaction, pbaction2, pbaction, pbaction_state, 0, ROT90, "Tehkan", "Pinball Action (set 2)", MACHINE_SUPPORTS_SAVE )
GAME( 1985, pbaction3, pbaction, pbactionx, pbaction, pbaction_state, pbactio3, ROT90, "Tehkan", "Pinball Action (set 3, encrypted)", MACHINE_SUPPORTS_SAVE )
GAME( 1985, pbaction4, pbaction, pbactionx, pbaction, pbaction_state, 0, ROT90, "Tehkan", "Pinball Action (set 4, encrypted)", MACHINE_SUPPORTS_SAVE )
GAME( 1985, pbaction5, pbaction, pbactionx, pbaction, pbaction_state, 0, ROT90, "Tehkan", "Pinball Action (set 5, encrypted)", MACHINE_SUPPORTS_SAVE )

11
src/mame/includes/pbaction.h
View File

@ -7,6 +7,7 @@
*************************************************************************/
#include "machine/gen_latch.h"
#include "machine/z80ctc.h"
class pbaction_state : public driver_device
{
@ -24,6 +25,7 @@ public:
m_gfxdecode(*this, "gfxdecode"),
m_palette(*this, "palette"),
m_soundlatch(*this, "soundlatch"),
m_ctc(*this, "ctc"),
m_decrypted_opcodes(*this, "decrypted_opcodes") { }
/* memory pointers */
@ -45,11 +47,15 @@ public:
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
required_device<generic_latch_8_device> m_soundlatch;
required_device<z80ctc_device> m_ctc;
optional_shared_ptr<uint8_t> m_decrypted_opcodes;
uint8_t m_nmi_mask;
DECLARE_WRITE8_MEMBER(pbaction_sh_command_w);
TIMER_CALLBACK_MEMBER(sound_trigger);
DECLARE_WRITE8_MEMBER(nmi_mask_w);
DECLARE_READ8_MEMBER(sound_data_r);
DECLARE_WRITE8_MEMBER(sound_irq_ack_w);
DECLARE_READ8_MEMBER(pbactio3_prot_kludge_r);
DECLARE_WRITE8_MEMBER(pbaction_videoram_w);
DECLARE_WRITE8_MEMBER(pbaction_colorram_w);
@ -65,12 +71,15 @@ public:
virtual void video_start() override;
uint32_t screen_update_pbaction(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
INTERRUPT_GEN_MEMBER(pbaction_interrupt);
INTERRUPT_GEN_MEMBER(vblank_irq);
DECLARE_WRITE_LINE_MEMBER(vblank_irq);
DECLARE_WRITE_LINE_MEMBER(sound_irq_clear);
void draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect );
void pbaction(machine_config &config);
void pbaction2(machine_config &config);
void pbactionx(machine_config &config);
void decrypted_opcodes_map(address_map &map);
void pbaction_map(address_map &map);
void pbaction_sound_io_map(address_map &map);
void pbaction_sound_map(address_map &map);
void pbaction2_sound_map(address_map &map);
};