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cgang: add maincpu interrupts (nw)

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This commit is contained in:
hap 2019-12-12 22:54:09 +01:00
parent f7733b7be3
commit c0462dd202
1 changed files with 58 additions and 2 deletions
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60
src/mame/drivers/cgang.cpp
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@ -25,19 +25,23 @@ Audio CPU side:
- 32KB ROM(27C256), 16KB RAM(2*HM6264AP-10)
- M5L8255AP-5 PPI
- Namco CUS121 sound interface, same chip used in Namco System 1
- Yamaha YM2151 @ 3.57MHz, 2*NEC D7759C @ 640KHz
- Yamaha YM2151 @ 3.57MHz, 2*NEC D7759C @ 640kHz
- 2*128KB ADPCM ROM (27C010, one for each D7759C)
Cabinet:
- 5 lanes with movable aliens, lightsensor under mouth
- 5 'energy containers', aliens will try to steal them
- 2 lightguns
- UFO with leds above cabinet
- 7segs for scorekeeping
- 2 ticket dispensers
******************************************************************************/
#include "emu.h"
#include "cpu/m6809/m6809.h"
#include "machine/pit8253.h"
#include "machine/ripple_counter.h"
#include "speaker.h"
@ -49,7 +53,8 @@ public:
cgang_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_audiocpu(*this, "audiocpu"),
m_pit(*this, "pit%u", 0)
{ }
// machine drivers
@ -62,16 +67,27 @@ private:
// devices/pointers
required_device<cpu_device> m_maincpu;
required_device<cpu_device> m_audiocpu;
required_device_array<pit8253_device, 2> m_pit;
// address maps
void main_map(address_map &map);
void sound_map(address_map &map);
// I/O handlers
DECLARE_WRITE_LINE_MEMBER(main_irq_w);
DECLARE_WRITE_LINE_MEMBER(main_firq_w);
DECLARE_WRITE8_MEMBER(main_irq_clear_w) { m_maincpu->set_input_line(M6809_IRQ_LINE, CLEAR_LINE); }
DECLARE_WRITE8_MEMBER(main_firq_clear_w) { m_maincpu->set_input_line(M6809_FIRQ_LINE, CLEAR_LINE); }
int m_main_irq = 0;
int m_main_firq = 0;
};
void cgang_state::machine_start()
{
// register for savestates
save_item(NAME(m_main_irq));
save_item(NAME(m_main_firq));
}
@ -82,6 +98,25 @@ void cgang_state::machine_start()
// maincpu
WRITE_LINE_MEMBER(cgang_state::main_irq_w)
{
// irq on rising edge
if (state && !m_main_irq)
m_maincpu->set_input_line(M6809_IRQ_LINE, ASSERT_LINE);
m_main_irq = state;
}
WRITE_LINE_MEMBER(cgang_state::main_firq_w)
{
// firq on rising edge
if (state && !m_main_firq)
m_maincpu->set_input_line(M6809_FIRQ_LINE, ASSERT_LINE);
m_main_firq = state;
}
// audiocpu
@ -93,6 +128,10 @@ void cgang_state::main_map(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x1fff).ram();
map(0x4008, 0x4008).mirror(0x0003).w(FUNC(cgang_state::main_irq_clear_w));
map(0x400c, 0x400c).mirror(0x0003).w(FUNC(cgang_state::main_firq_clear_w));
map(0x4010, 0x4013).rw(m_pit[0], FUNC(pit8253_device::read), FUNC(pit8253_device::write));
map(0x4014, 0x4017).rw(m_pit[1], FUNC(pit8253_device::read), FUNC(pit8253_device::write));
map(0x8000, 0xffff).rom();
}
@ -127,6 +166,23 @@ void cgang_state::cgang(machine_config &config)
MC6809E(config, m_audiocpu, 8_MHz_XTAL/4);
m_audiocpu->set_addrmap(AS_PROGRAM, &cgang_state::sound_map);
PIT8253(config, m_pit[0], 0);
m_pit[0]->set_clk<0>(4_MHz_XTAL/4);
m_pit[0]->set_clk<1>(4_MHz_XTAL/4);
m_pit[0]->set_clk<2>(4_MHz_XTAL/4);
PIT8253(config, m_pit[1], 0);
m_pit[1]->set_clk<0>(4_MHz_XTAL/4);
m_pit[1]->set_clk<1>(4_MHz_XTAL/4);
m_pit[1]->set_clk<2>(4_MHz_XTAL/4);
m_pit[1]->out_handler<2>().set("int_clk", FUNC(ripple_counter_device::clock_w));
ripple_counter_device &int_clk(RIPPLE_COUNTER(config, "int_clk")); // 4040
int_clk.set_stages(12);
int_clk.count_out_cb().set_inputline(m_maincpu, INPUT_LINE_NMI).bit(0);
int_clk.count_out_cb().append(FUNC(cgang_state::main_irq_w)).bit(3);
int_clk.count_out_cb().append(FUNC(cgang_state::main_firq_w)).bit(4);
/* sound hardware */
SPEAKER(config, "mono").front_center();
}