C++ (Cpp) m_read_slave_ack_funcの例

コード例 #1

ファイル: pic8259.cpp プロジェクト: Robbbert/store1

uint32_t pic8259_device::acknowledge()
{
	for (int n = 0, irq = m_prio; n < 8; n++, irq = (irq + 1) & 7)
	{
		uint8_t mask = 1 << irq;

		/* is this IRQ pending and enabled? */
		if ((m_irr & mask) && !(m_imr & mask))
		{
			if (LOG_GENERAL)
			{
				logerror("pic8259_acknowledge() %s: PIC acknowledge IRQ #%d\n", tag(), irq);
			}
			if (!m_level_trig_mode)
			{
				m_irr &= ~mask;
			}

			if (!m_auto_eoi)
			{
				m_isr |= mask;
			}

			set_timer();

			if ((m_cascade!=0) && (m_master!=0) && (mask & m_slave))
			{
				// it's from slave device
				return m_read_slave_ack_func(irq);
			}
			else
			{
				if (m_is_x86)
				{
					/* For x86 mode*/
					return irq + m_base;
				}
				else
				{
					/* in case of 8080/85) */
					return 0xcd0000 + (m_vector_addr_high << 8) + m_vector_addr_low + (irq << (3-m_vector_size));
				}
			}
		}
	}
	logerror("Spurious IRQ\n");
	if(m_is_x86)
		return m_base + 7;
	return 0xcd0000 + (m_vector_addr_high << 8) + m_vector_addr_low + (7 << (3-m_vector_size));
}

コード例 #2

ファイル: pic8259.c プロジェクト: Ander-son/libretro-mame

UINT32 pic8259_device::acknowledge()
{
	UINT8 mask;
	int irq;

	for (irq = 0; irq < IRQ_COUNT; irq++)
	{
		mask = 1 << irq;

		/* is this IRQ pending and enabled? */
		if ((m_irr & mask) && !(m_imr & mask))
		{
			if (LOG_GENERAL)
			{
				logerror("pic8259_acknowledge(): PIC acknowledge IRQ #%d\n", irq);
			}
			if (!m_level_trig_mode)
			{
				m_irr &= ~mask;
			}

			if (!m_auto_eoi)
			{
				m_isr |= mask;
			}

			set_timer();

			if ((m_cascade!=0) && (m_master!=0) && (mask & m_slave))
			{
				// it's from slave device
				return m_read_slave_ack_func(irq);
			}
			else
			{
				if (m_is_x86)
				{
					/* For x86 mode*/
					return irq + m_base;
				}
				else
				{
					/* in case of 8080/85) */
					return 0xcd0000 + (m_vector_addr_high << 8) + m_vector_addr_low + (irq << (3-m_vector_size));
				}
			}
		}
	}
	return 0;
}