Exemplo n.º 1
0
void m68705_device::interrupt()
{
	if (m_pending_interrupts & M68705_INT_MASK)
	{
		if ((CC & IFLAG) == 0)
		{
			pushword(m_pc);
			pushbyte(m_x);
			pushbyte(m_a);
			pushbyte(m_cc);
			SEI;
			standard_irq_callback(0);

			if (BIT(m_pending_interrupts, M68705_IRQ_LINE))
			{
				LOGINT("servicing /INT interrupt\n");
				m_pending_interrupts &= ~(1 << M68705_IRQ_LINE);
				rm16(M68705_VECTOR_INT, m_pc);
			}
			else if (BIT(m_pending_interrupts, M68705_INT_TIMER))
			{
				LOGINT("servicing timer/counter interrupt\n");
				rm16(M68705_VECTOR_TIMER, m_pc);
			}
			else
			{
				throw emu_fatalerror("Unknown pending interrupt");
			}
			m_icount -= 11;
			burn_cycles(11);
		}
	}
}
Exemplo n.º 2
0
void m68705_device::device_reset()
{
	m6805_base_device::device_reset();

	// reset digital I/O
	port_ddr_w<0>(space(AS_PROGRAM), 0, 0x00, 0xff);
	port_ddr_w<1>(space(AS_PROGRAM), 0, 0x00, 0xff);
	port_ddr_w<2>(space(AS_PROGRAM), 0, 0x00, 0xff);
	port_ddr_w<3>(space(AS_PROGRAM), 0, 0x00, 0xff);

	// reset timer/counter
	u8 const options(get_mask_options());
	m_prescaler = 0x7f;
	m_tdr = 0xff;
	m_tcr = BIT(options, 6) ? (0x58 | (options & 0x27)) : (0x40 | (m_tcr & 0x37));

	// reset EPROM control
	m_pcr |= 0xfb; // b2 (/VPON) is driven by external input and hence unaffected by reset

	if (CLEAR_LINE != m_vihtp)
	{
		LOG("loading bootstrap vector\n");
		rm16(M68705_VECTOR_BOOTSTRAP, m_pc);
	}
	else
	{
		LOG("loading reset vector\n");
		rm16(M68705_VECTOR_RESET, m_pc);
	}
}
Exemplo n.º 3
0
void hd63705_device::device_reset()
{
	m6805_base_device::device_reset();

	m_s.w.l = SP_MASK;

	rm16(0x1ffe, m_pc);
}
Exemplo n.º 4
0
void m68hc05eg_device::interrupt_vector()
{
	if (BIT(m_pending_interrupts, M68HC05EG_INT_IRQ))
	{
		m_pending_interrupts &= ~(1 << M68HC05EG_INT_IRQ);
		rm16(0x1ffa, m_pc);
	}
	else if (BIT(m_pending_interrupts, M68HC05EG_INT_TIMER))
	{
		m_pending_interrupts &= ~(1 << M68HC05EG_INT_TIMER);
		rm16(0x1ff8, m_pc);
	}
	else if (BIT(m_pending_interrupts, M68HC05EG_INT_CPI))
	{
		m_pending_interrupts &= ~(1 << M68HC05EG_INT_CPI);
		rm16(0x1ff6, m_pc);
	}
}
Exemplo n.º 5
0
void hd63705_device::interrupt_vector()
{
	/* Need to add emulation of other interrupt sources here KW-2/4/99 */
	/* This is just a quick patch for Namco System 2 operation         */

	if ((m_pending_interrupts & (1 << HD63705_INT_IRQ1)) != 0)
	{
		m_pending_interrupts &= ~(1 << HD63705_INT_IRQ1);
		rm16(0x1ff8, m_pc);
	}
	else if ((m_pending_interrupts & (1 << HD63705_INT_IRQ2)) != 0)
	{
		m_pending_interrupts &= ~(1 << HD63705_INT_IRQ2);
		rm16(0x1fec, m_pc);
	}
	else if ((m_pending_interrupts & (1 << HD63705_INT_ADCONV)) != 0)
	{
		m_pending_interrupts &= ~(1 << HD63705_INT_ADCONV);
		rm16(0x1fea, m_pc);
	}
	else if ((m_pending_interrupts & (1 << HD63705_INT_TIMER1)) != 0)
	{
		m_pending_interrupts &= ~(1 << HD63705_INT_TIMER1);
		rm16(0x1ff6, m_pc);
	}
	else if ((m_pending_interrupts & (1 << HD63705_INT_TIMER2)) != 0)
	{
		m_pending_interrupts &= ~(1 << HD63705_INT_TIMER2);
		rm16(0x1ff4, m_pc);
	}
	else if ((m_pending_interrupts & (1 << HD63705_INT_TIMER3)) != 0)
	{
		m_pending_interrupts &= ~(1<<HD63705_INT_TIMER3);
		rm16(0x1ff2, m_pc);
	}
	else if ((m_pending_interrupts & (1 << HD63705_INT_PCI)) != 0)
	{
		m_pending_interrupts &= ~(1 << HD63705_INT_PCI);
		rm16(0x1ff0, m_pc);
	}
	else if ((m_pending_interrupts & (1 << HD63705_INT_SCI)) != 0)
	{
		m_pending_interrupts &= ~(1 << HD63705_INT_SCI);
		rm16(0x1fee, m_pc);
	}
}
Exemplo n.º 6
0
/* Generate interrupts */
void m6805_base_device::interrupt()
{
	/* the 6805 latches interrupt requests internally, so we don't clear */
	/* pending_interrupts until the interrupt is taken, no matter what the */
	/* external IRQ pin does. */

	if (BIT(m_pending_interrupts, HD63705_INT_NMI))
	{
		pushword(m_pc);
		pushbyte(m_x);
		pushbyte(m_a);
		pushbyte(m_cc);
		SEI;
		/* no vectors supported, just do the callback to clear irq_state if needed */
		standard_irq_callback(0);

		rm16(0x1ffc, m_pc);
		m_pending_interrupts &= ~(1 << HD63705_INT_NMI);

		m_icount -= 11;
		burn_cycles(11);
	}
	else if ((m_pending_interrupts & ((1 << M6805_IRQ_LINE) | HD63705_INT_MASK)) != 0)
	{
		if ((CC & IFLAG) == 0)
		{
			/* standard IRQ */
			pushword(m_pc);
			pushbyte(m_x);
			pushbyte(m_a);
			pushbyte(m_cc);
			SEI;
			/* no vectors supported, just do the callback to clear irq_state if needed */
			standard_irq_callback(0);

			interrupt_vector();

			m_pending_interrupts &= ~(1 << M6805_IRQ_LINE);

			m_icount -= 11;
			burn_cycles(11);
		}
	}
}
Exemplo n.º 7
0
void m6805_base_device::device_reset()
{
	m_ea.w.l = 0;
	m_pc.w.l = 0;
	m_s.w.l = SP_MASK;
	m_a = 0;
	m_x = 0;
	m_cc = 0;
	m_pending_interrupts = 0;

	m_nmi_state = 0;

	m_program = &space(AS_PROGRAM);
	m_direct = &m_program->direct();

	/* IRQ disabled */
	SEI;

	rm16(0xfffe, m_pc);
}
Exemplo n.º 8
0
void m68hc05eg_device::device_reset()
{
	m6805_base_device::device_reset();

	rm16(0x1ffe, m_pc);
}
Exemplo n.º 9
0
void m6805_base_device::interrupt_vector()
{
	rm16(0xfffa, m_pc);
}