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(MESS) fb01.c: Fixed irq handling (nw)

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This commit is contained in:
Wilbert Pol 2014-06-12 21:03:04 +00:00
parent e97ae4ed01
commit 1fce9fa748
1 changed files with 52 additions and 3 deletions
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55
src/mess/drivers/fb01.c
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@ -20,19 +20,33 @@ class fb01_state : public driver_device
public:
fb01_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_upd71051(*this, "upd71051")
, m_midi_thru(*this, "mdthru")
, m_ym2164_irq(CLEAR_LINE)
, m_upd71051_txrdy(CLEAR_LINE)
, m_upd71051_rxrdy(CLEAR_LINE)
{
}
DECLARE_WRITE_LINE_MEMBER(write_usart_clock);
DECLARE_WRITE_LINE_MEMBER(midi_in);
DECLARE_WRITE_LINE_MEMBER(ym2164_irq_w);
DECLARE_WRITE_LINE_MEMBER(upd71051_txrdy_w);
DECLARE_WRITE_LINE_MEMBER(upd71051_rxrdy_w);
virtual void machine_start();
virtual void machine_reset();
private:
required_device<z80_device> m_maincpu;
required_device<i8251_device> m_upd71051;
required_device<midi_port_device> m_midi_thru;
int m_ym2164_irq;
int m_upd71051_txrdy;
int m_upd71051_rxrdy;
void update_int();
};
@ -75,6 +89,14 @@ static INPUT_PORTS_START( fb01 )
INPUT_PORTS_END
void fb01_state::machine_start()
{
save_item(NAME(m_ym2164_irq));
save_item(NAME(m_upd71051_txrdy));
save_item(NAME(m_upd71051_rxrdy));
}
void fb01_state::machine_reset()
{
m_upd71051->write_cts(0);
@ -96,6 +118,33 @@ WRITE_LINE_MEMBER(fb01_state::midi_in)
}
WRITE_LINE_MEMBER(fb01_state::ym2164_irq_w)
{
m_ym2164_irq = state;
update_int();
}
WRITE_LINE_MEMBER(fb01_state::upd71051_txrdy_w)
{
m_upd71051_txrdy = state;
update_int();
}
WRITE_LINE_MEMBER(fb01_state::upd71051_rxrdy_w)
{
m_upd71051_rxrdy = state;
update_int();
}
void fb01_state::update_int()
{
m_maincpu->set_input_line(0, (m_ym2164_irq || m_upd71051_txrdy || m_upd71051_rxrdy) ? ASSERT_LINE : CLEAR_LINE);
}
static HD44780_PIXEL_UPDATE(fb01_pixel_update)
{
if ( pos < 8 && line < 2 )
@ -130,8 +179,8 @@ static MACHINE_CONFIG_START( fb01, fb01_state )
MCFG_HD44780_PIXEL_UPDATE_CB(fb01_pixel_update)
MCFG_DEVICE_ADD("upd71051", I8251, XTAL_4MHz)
MCFG_I8251_RXRDY_HANDLER(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_DEVCB_XOR(1) // inverted -> Z80 INT
MCFG_I8251_TXRDY_HANDLER(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_DEVCB_XOR(1) // inverted -> Z80 INT
MCFG_I8251_RXRDY_HANDLER(WRITELINE(fb01_state, upd71051_rxrdy_w))
MCFG_I8251_TXRDY_HANDLER(WRITELINE(fb01_state, upd71051_txrdy_w))
MCFG_I8251_TXD_HANDLER(DEVWRITELINE("mdout", midi_port_device, write_txd))
MCFG_DEVICE_ADD("usart_clock", CLOCK, XTAL_4MHz / 8) // 500KHz
@ -146,7 +195,7 @@ static MACHINE_CONFIG_START( fb01, fb01_state )
MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
MCFG_YM2151_ADD("ym2164", XTAL_4MHz)
MCFG_YM2151_IRQ_HANDLER(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
MCFG_YM2151_IRQ_HANDLER(WRITELINE(fb01_state, ym2164_irq_w))
MCFG_SOUND_ROUTE(0, "lspeaker", 1.00)
MCFG_SOUND_ROUTE(1, "rspeaker", 1.00)