MAME SVN History

199869 Revisions

r21655 Wednesday 6th March, 2013 at 19:21:42 UTC by Jonathan Gevaryahu
(MESS) cat.c (Canon Cat): Got rid of the keyboard interrupt timer and hooked the keyboard interrupt to the 6ms timer instead, which is closer to hardware. The cursor blinks at a more correct but not completely correct rate now. The duart (the REAL source of the interrupts, which should fire with the transitions of the 12ms period squarewave) still does not work for interrupts properly, it needs its innards fixed. [Lord Nightmare]

r21655 Wednesday 6th March, 2013 at 19:21:42 UTC by Jonathan Gevaryahu

(MESS) cat.c (Canon Cat): Got rid of the keyboard interrupt timer and hooked the keyboard interrupt to the 6ms timer instead, which is closer to hardware. The cursor blinks at a more correct but not completely correct rate now. The duart (the REAL source of the interrupts, which should fire with the transitions of the 12ms period squarewave) still does not work for interrupts properly, it needs its innards fixed. [Lord Nightmare]

[src/mess/drivers]

cat.c

trunk/src/mess/drivers/cat.c
r21654	r21655
236	236	#undef DEBUG_DUART_OUTPUT_LINES
237	237	#undef DEBUG_DUART_INPUT_LINES
238	238	#undef DEBUG_DUART_TXD
	239	// TODO: the duart irq handler doesn't work becuase there is no easy way to strobe the duart to force it to check its inputs yet
239	240	#undef DEBUG_DUART_IRQ_HANDLER
240	241
241	242	#undef DEBUG_TEST_W
r21654	r21655
804	805	INPUT_PORTS_END
805	806
806	807
807		TIMER_CALLBACK_MEMBER(cat_state::keyboard_callback)
808		{
809		machine().device("maincpu")->execute().set_input_line(M68K_IRQ_1, ASSERT_LINE);
810		}
811
812
813	808	TIMER_CALLBACK_MEMBER(cat_state::counter_6ms_callback)
814	809	{
815	810	// This is effectively also the KTOBF line 'clock' output to the d-latch before the duart
r21654	r21655
817	812	// is there some way to 'strobe' the duart to tell it that its input ports just changed?
818	813	m_duart_inp ^= 0x04;
819	814	m_6ms_counter++;
	815	machine().device("maincpu")->execute().set_input_line(M68K_IRQ_1, ASSERT_LINE); // hack until duart ints work; as of march 2013 they do not work correctly here (they fire at the wrong rate)
820	816	}
821	817
822	818	IRQ_CALLBACK_MEMBER(cat_state::cat_int_ack)
r21654	r21655
831	827	m_6ms_counter = 0;
832	828	m_video_enable = 1;
833	829	m_video_invert = 0;
834		m_keyboard_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(cat_state::keyboard_callback),this));
835	830	m_6ms_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(cat_state::counter_6ms_callback),this));
836	831	machine().device<nvram_device>("nvram")->set_base(m_svram, 0x4000);
837	832	}
r21654	r21655
842	837	m_duart_inp = 0;
843	838	m_6ms_counter = 0;
844	839	m_floppy_control = 0;
845		m_keyboard_timer->adjust(attotime::zero, 0, attotime::from_hz(120));
846	840	m_6ms_timer->adjust(attotime::zero, 0, attotime::from_hz((XTAL_19_968MHz/2)/65536));
847	841	}
848	842
r21654	r21655
925	919	static void duart_irq_handler(device_t *device, int state, UINT8 vector)
926	920	{
927	921	#ifdef DEBUG_DUART_IRQ_HANDLER
928		fprintf(stderr, "Duart IRQ handler called; vector: %06X\n", vector);
	922	fprintf(stderr, "Duart IRQ handler called: state: %02X, vector: %06X\n", state, vector);
929	923	#endif
	924	//device->machine().device("maincpu")->execute().set_input_line_and_vector(M68K_IRQ_1, state, vector);
930	925	}
931	926
932	927	static void duart_tx(device_t *device, int channel, UINT8 data)

199869 Revisions