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Fixed: was off by one on pixels, allowing four extra pixel output cycles per line.

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This commit is contained in:
Thomas Harte 2016-05-17 19:02:32 -04:00
parent c96674b341
commit ad6f405483
1 changed files with 16 additions and 5 deletions
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21
Machines/Atari2600/Atari2600.cpp
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@ -96,6 +96,7 @@ void Machine::update_upcoming_event()
_upcomingEvents[upcomingEventsPointerPlus4].updates |= Event::Action::Ball;
}
_objectCounter[4] = (_objectCounter[4] + 1)%160;
// printf("-%d- ", _objectCounter[4]);
// the players and missles become visible only upon overflow to zero, so schedule for
// 5/6 clocks ahead from 159
@ -219,8 +220,9 @@ void Machine::output_pixels(unsigned int count)
case 227: case 0: case 1: case 2: state = OutputState::Blank; break;
case 3: case 4: case 5: case 6: state = OutputState::Sync; break;
case 7: case 8: case 9: case 10: state = OutputState::ColourBurst; break;
case 11: case 12: case 13: case 14: case 15: state = OutputState::Blank; break;
case 16: case 17: state = _vBlankExtend ? OutputState::Blank : OutputState::Pixel; break;
case 11: case 12: case 13:
case 14: case 15: case 16: state = OutputState::Blank; break;
case 17: case 18: state = _vBlankExtend ? OutputState::Blank : OutputState::Pixel; break;
default: state = OutputState::Pixel; break;
}
@ -235,6 +237,7 @@ void Machine::output_pixels(unsigned int count)
// grab pixel state if desired
if(state == OutputState::Pixel)
{
update_upcoming_event();
}
@ -259,7 +262,7 @@ void Machine::output_pixels(unsigned int count)
if(_hMoveCounter) _hMoveCounter--;
_upcomingEvents[(_upcomingEventsPointer+4)%number_of_upcoming_events].updates |= Event::Action::HMoveCompare;
_upcomingEvents[(_upcomingEventsPointer+2)%number_of_upcoming_events].updates |= Event::Action::HMoveDecrement;
} else printf("\n");
} //else printf("\n");
}
if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::HMoveDecrement)
@ -269,11 +272,16 @@ void Machine::output_pixels(unsigned int count)
if(_hMoveFlags & (1 << c))
{
_objectCounter[c] = (_objectCounter[c] + 1)%160;
if(c == 4)
{
// printf("[%d] ", _objectCounter[4]);
_pixelCounters.ball++; // TODO: generalise this, obviously.
}
}
}
printf("[%d] %d ", _objectMotion[4], _objectCounter[4]);
// if(_hMoveFlags & (1 << 4))
// printf("%d ", _objectCounter[4]);
}
_upcomingEvents[_upcomingEventsPointer].updates = 0;
// read that state
@ -366,6 +374,7 @@ void Machine::output_pixels(unsigned int count)
{
_vBlankExtend = false;
set_ready_line(false);
// printf("\n");
}
}
}
@ -599,6 +608,8 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
_hMoveFlags = 0x1f;
_hMoveCounter = 15;
_upcomingEvents[(_upcomingEventsPointer + 15)%number_of_upcoming_events].updates |= Event::Action::HMoveCompare;
// _objectCounter[4] = (_objectCounter[4] + 8)%160;
printf("%d: ", _objectMotion[4]);
break;
case 0x2b:
_objectMotion[0] =