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bionicc: Correct audio CPU NMI source

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This commit is contained in:
Dirk Best 2019-07-27 19:20:27 +02:00
parent 990cf6ee7c
commit 053b6ef7d0
2 changed files with 22 additions and 11 deletions
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28
src/mame/drivers/bionicc.cpp
View File

@ -145,6 +145,17 @@ void bionicc_state::dmaon_w(u16 data)
}
//**************************************************************************
// AUDIO
//**************************************************************************
void bionicc_state::audiocpu_nmi_w(u8 data)
{
m_audiocpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
m_audiocpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
}
/********************************************************************
Interrupt
@ -182,7 +193,7 @@ void bionicc_state::main_map(address_map &map)
map(0xe0d00, 0xe3fff).ram(); /* RAM? */
map(0xe4000, 0xe4001).mirror(0x3ffc).portr("INPUTS");
map(0xe4000, 0xe4001).mirror(0x3ffc).w(FUNC(bionicc_state::gfxctrl_w)); /* + coin counters */
map(0xe4002, 0xe4003).mirror(0x3ffc).portr("DSW").nopw();
map(0xe4002, 0xe4003).mirror(0x3ffc).portr("DSW").w(FUNC(bionicc_state::audiocpu_nmi_w));
map(0xe8010, 0xe8017).w(FUNC(bionicc_state::scroll_w));
map(0xe8018, 0xe8019).nopw(); // vblank irq ack?
map(0xe801a, 0xe801b).w(FUNC(bionicc_state::dmaon_w));
@ -352,21 +363,16 @@ void bionicc_state::machine_reset()
void bionicc_state::bionicc(machine_config &config)
{
/* basic machine hardware */
M68000(config, m_maincpu, XTAL(24'000'000) / 2); /* 12 MHz - verified in schematics */
M68000(config, m_maincpu, 24_MHz_XTAL / 2); /* 12 MHz - verified in schematics */
m_maincpu->set_addrmap(AS_PROGRAM, &bionicc_state::main_map);
TIMER(config, "scantimer").configure_scanline(FUNC(bionicc_state::scanline), "screen", 0, 1);
z80_device &audiocpu(Z80(config, "audiocpu", XTAL(14'318'181) / 4)); /* EXO3 C,B=GND, A=5V ==> Divisor 2^2 */
z80_device &audiocpu(Z80(config, "audiocpu", 14.318181_MHz_XTAL / 4)); /* EXO3 C,B=GND, A=5V ==> Divisor 2^2 */
audiocpu.set_addrmap(AS_PROGRAM, &bionicc_state::sound_map);
/* FIXME: interrupt timing
* schematics indicate that nmi_line is set on M680000 access with AB1=1
* and IOCS=0 (active low), see pages A-1/10, A-4/10 in schematics
*/
audiocpu.set_periodic_int(FUNC(bionicc_state::nmi_line_pulse), attotime::from_hz(4*60));
/* Protection MCU Intel C8751H-88 runs at 24MHz / 4 = 6MHz */
I8751(config, m_mcu, XTAL(24'000'000) / 4);
I8751(config, m_mcu, 24_MHz_XTAL / 4);
m_mcu->set_addrmap(AS_IO, &bionicc_state::mcu_io);
m_mcu->port_in_cb<1>().set([this](){ return m_audiocpu_to_mcu; });
m_mcu->port_out_cb<1>().set([this](u8 data){ m_mcu_p1 = data; });
@ -375,7 +381,7 @@ void bionicc_state::bionicc(machine_config &config)
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
/* FIXME: should be 257 visible horizontal pixels, first visible pixel should be repeated, back porch/front porch should be separated */
screen.set_raw(XTAL(24'000'000) / 4, 386, 0, 256, 260, 16, 240);
screen.set_raw(24_MHz_XTAL / 4, 386, 0, 256, 260, 16, 240);
screen.set_screen_update(FUNC(bionicc_state::screen_update));
screen.screen_vblank().set(m_spriteram, FUNC(buffered_spriteram16_device::vblank_copy_rising));
screen.set_palette(m_palette);
@ -392,7 +398,7 @@ void bionicc_state::bionicc(machine_config &config)
SPEAKER(config, "mono").front_center();
YM2151(config, "ymsnd", XTAL(14'318'181) / 4).add_route(0, "mono", 0.60).add_route(1, "mono", 0.60);
YM2151(config, "ymsnd", 14.318181_MHz_XTAL / 4).add_route(0, "mono", 0.60).add_route(1, "mono", 0.60);
}

5
src/mame/includes/bionicc.h
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@ -23,6 +23,7 @@ public:
bionicc_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_audiocpu(*this, "audiocpu"),
m_mcu(*this, "mcu"),
m_gfxdecode(*this, "gfxdecode"),
m_palette(*this, "palette"),
@ -43,6 +44,7 @@ protected:
private:
required_device<cpu_device> m_maincpu;
required_device<cpu_device> m_audiocpu;
required_device<i8751_device> m_mcu;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
@ -76,6 +78,9 @@ private:
tilemap_t *m_fg_tilemap;
uint16_t m_scroll[4];
// audio
void audiocpu_nmi_w(u8 data);
// protection mcu
u8 m_audiocpu_to_mcu; // ls374 at 4a
u8 m_mcu_to_audiocpu; // ls374 at 5a