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(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]

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This commit is contained in:
Jonathan Gevaryahu 2013-03-06 19:21:42 +00:00
parent 065b70b8ee
commit 3327ca4b5d
1 changed files with 4 additions and 9 deletions
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13
src/mess/drivers/cat.c
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@ -236,6 +236,7 @@ ToDo:
#undef DEBUG_DUART_OUTPUT_LINES
#undef DEBUG_DUART_INPUT_LINES
#undef DEBUG_DUART_TXD
// 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
#undef DEBUG_DUART_IRQ_HANDLER
#undef DEBUG_TEST_W
@ -804,12 +805,6 @@ static INPUT_PORTS_START( swyft )
INPUT_PORTS_END
TIMER_CALLBACK_MEMBER(cat_state::keyboard_callback)
{
machine().device("maincpu")->execute().set_input_line(M68K_IRQ_1, ASSERT_LINE);
}
TIMER_CALLBACK_MEMBER(cat_state::counter_6ms_callback)
{
// This is effectively also the KTOBF line 'clock' output to the d-latch before the duart
@ -817,6 +812,7 @@ TIMER_CALLBACK_MEMBER(cat_state::counter_6ms_callback)
// is there some way to 'strobe' the duart to tell it that its input ports just changed?
m_duart_inp ^= 0x04;
m_6ms_counter++;
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)
}
IRQ_CALLBACK_MEMBER(cat_state::cat_int_ack)
@ -831,7 +827,6 @@ MACHINE_START_MEMBER(cat_state,cat)
m_6ms_counter = 0;
m_video_enable = 1;
m_video_invert = 0;
m_keyboard_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(cat_state::keyboard_callback),this));
m_6ms_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(cat_state::counter_6ms_callback),this));
machine().device<nvram_device>("nvram")->set_base(m_svram, 0x4000);
}
@ -842,7 +837,6 @@ MACHINE_RESET_MEMBER(cat_state,cat)
m_duart_inp = 0;
m_6ms_counter = 0;
m_floppy_control = 0;
m_keyboard_timer->adjust(attotime::zero, 0, attotime::from_hz(120));
m_6ms_timer->adjust(attotime::zero, 0, attotime::from_hz((XTAL_19_968MHz/2)/65536));
}
@ -925,8 +919,9 @@ UINT32 cat_state::screen_update_swyft(screen_device &screen, bitmap_ind16 &bitma
static void duart_irq_handler(device_t *device, int state, UINT8 vector)
{
#ifdef DEBUG_DUART_IRQ_HANDLER
fprintf(stderr, "Duart IRQ handler called; vector: %06X\n", vector);
fprintf(stderr, "Duart IRQ handler called: state: %02X, vector: %06X\n", state, vector);
#endif
//device->machine().device("maincpu")->execute().set_input_line_and_vector(M68K_IRQ_1, state, vector);
}
static void duart_tx(device_t *device, int channel, UINT8 data)