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cgenie floppy: simplify interrupt logic

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This commit is contained in:
Dirk Best 2015-05-25 13:22:24 +02:00
parent 3165d460a7
commit b7d9bd0f71
2 changed files with 7 additions and 20 deletions
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25
src/emu/bus/cgenie/expansion/floppy.c
View File

@ -110,7 +110,6 @@ cgenie_fdc_device::cgenie_fdc_device(const machine_config &mconfig, const char *
m_floppy3(*this, "fd1793:3"),
m_socket(*this, "socket"),
m_floppy(NULL),
m_timer_irq_off(NULL),
m_irq_status(0)
{
}
@ -121,7 +120,6 @@ cgenie_fdc_device::cgenie_fdc_device(const machine_config &mconfig, const char *
void cgenie_fdc_device::device_start()
{
m_timer_irq_off = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(cgenie_fdc_device::irq_off_callback), this));
}
//-------------------------------------------------
@ -153,27 +151,18 @@ void cgenie_fdc_device::device_reset()
READ8_MEMBER( cgenie_fdc_device::irq_r )
{
return m_irq_status;
}
UINT8 data = m_irq_status;
void cgenie_fdc_device::update_irq()
{
m_slot->int_w(m_irq_status ? 1 : 0);
m_irq_status &= ~IRQ_TIMER;
m_slot->int_w(m_irq_status ? ASSERT_LINE : CLEAR_LINE);
return data;
}
TIMER_DEVICE_CALLBACK_MEMBER( cgenie_fdc_device::timer_callback )
{
m_irq_status |= IRQ_TIMER;
update_irq();
// timer to turn it off again
m_timer_irq_off->adjust(attotime::from_usec(250));
}
TIMER_CALLBACK_MEMBER( cgenie_fdc_device::irq_off_callback )
{
m_irq_status &= ~IRQ_TIMER;
update_irq();
m_slot->int_w(ASSERT_LINE);
}
DEVICE_IMAGE_LOAD_MEMBER( cgenie_fdc_device, socket_load )
@ -202,7 +191,7 @@ WRITE_LINE_MEMBER( cgenie_fdc_device::intrq_w )
else
m_irq_status &= ~IRQ_WDC;
update_irq();
m_slot->int_w(m_irq_status ? ASSERT_LINE : CLEAR_LINE);
}
WRITE8_MEMBER( cgenie_fdc_device::select_w )

2
src/emu/bus/cgenie/expansion/floppy.h
View File

@ -30,7 +30,6 @@ public:
cgenie_fdc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
TIMER_DEVICE_CALLBACK_MEMBER(timer_callback);
TIMER_CALLBACK_MEMBER( irq_off_callback );
DECLARE_DEVICE_IMAGE_LOAD_MEMBER(socket_load);
@ -65,7 +64,6 @@ private:
floppy_image_device *m_floppy;
emu_timer *m_timer_irq_off;
UINT8 m_irq_status;
};