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Made genuine first approximate attempt at hmove.

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This commit is contained in:
Thomas Harte 2016-05-17 18:35:40 -04:00
parent d170bb14e6
commit c96674b341
1 changed files with 32 additions and 2 deletions
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34
Machines/Atari2600/Atari2600.cpp
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@ -241,8 +241,39 @@ void Machine::output_pixels(unsigned int count)
// apply any queued changes and flush the record
if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::Playfield)
_playfieldOutput = _upcomingEvents[_upcomingEventsPointer].playfieldOutput;
if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::Ball)
_pixelCounters.ball = 0;
if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::HMoveCompare)
{
for(int c = 0; c < 5; c++)
{
if((_objectMotion[c]^8^_hMoveCounter) == 0xf)
{
_hMoveFlags &= ~(1 << c);
}
}
if(_hMoveFlags)
{
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");
}
if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::HMoveDecrement)
{
for(int c = 0; c < 5; c++)
{
if(_hMoveFlags & (1 << c))
{
_objectCounter[c] = (_objectCounter[c] + 1)%160;
}
}
printf("[%d] %d ", _objectMotion[4], _objectCounter[4]);
}
_upcomingEvents[_upcomingEventsPointer].updates = 0;
// read that state
@ -538,7 +569,7 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
case 0x22:
case 0x23:
case 0x24:
_objectMotion[decodedAddress - 0x20] = *value;
_objectMotion[decodedAddress - 0x20] = (*value) & 0xf;
break;
case 0x25: _playerGraphicsLatchEnable[0] = *value; break;
@ -568,7 +599,6 @@ 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;
_upcomingEvents[(_upcomingEventsPointer + 17)%number_of_upcoming_events].updates |= Event::Action::HMoveDecrement;
break;
case 0x2b:
_objectMotion[0] =