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https://github.com/TomHarte/CLK.git
synced 2025-01-11 08:30:55 +00:00
Attempted to generalise on pixel counter storage, at least. Further adjusted background timing but I'm still not sure.
This commit is contained in:
Thomas Harte
parent
ad6f405483
commit
a1e63e8320
@ -93,7 +93,10 @@ void Machine::update_upcoming_event()
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// is the result of a counter rollover or a programmatic reset
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if(!_objectCounter[4])
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{
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_upcomingEvents[upcomingEventsPointerPlus4].updates |= Event::Action::Ball;
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_upcomingEvents[upcomingEventsPointerPlus4].updates |= Event::Action::ResetPixelCounter;
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_upcomingEvents[upcomingEventsPointerPlus4].pixelCounterMask |= (1 << 4);
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// _upcomingEvents[_upcomingEventsPointer].updates |= Event::Action::ResetPixelCounter;
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// _upcomingEvents[_upcomingEventsPointer].pixelCounterMask |= (1 << 4);
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}
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_objectCounter[4] = (_objectCounter[4] + 1)%160;
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// printf("-%d- ", _objectCounter[4]);
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@ -113,9 +116,9 @@ uint8_t Machine::get_output_pixel()
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uint8_t ballPixel = 0;
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if(_ballGraphicsEnable&2) {
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int ballSize = 1 << ((_playfieldControl >> 4)&3);
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ballPixel = (_pixelCounters.ball < ballSize) ? 1 : 0;
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ballPixel = (_pixelCounter[4] < ballSize) ? 1 : 0;
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}
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_pixelCounters.ball ++;
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_pixelCounter[4] ++;
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// get player and missile proposed pixels
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/* uint8_t playerPixels[2] = {0, 0}, missilePixels[2] = {0, 0};
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@ -214,15 +217,16 @@ void Machine::output_pixels(unsigned int count)
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{
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OutputState state;
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// determine which output will start this cycle; all outputs are delayed by 4 CLKs momentarily...
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// determine which output will start in four cycles
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switch(_horizontalTimer >> 2)
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{
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case 227: case 0: case 1: case 2: state = OutputState::Blank; break;
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case 56: case 0: case 1: case 2: state = OutputState::Blank; break;
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case 3: case 4: case 5: case 6: state = OutputState::Sync; break;
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case 7: case 8: case 9: case 10: state = OutputState::ColourBurst; break;
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case 11: case 12: case 13:
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case 14: case 15: case 16: state = OutputState::Blank; break;
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case 17: case 18: state = _vBlankExtend ? OutputState::Blank : OutputState::Pixel; break;
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case 14: case 15: state = OutputState::Blank; break;
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case 16: case 17: state = _vBlankExtend ? OutputState::Blank : OutputState::Pixel; break;
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default: state = OutputState::Pixel; break;
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}
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@ -232,12 +236,11 @@ void Machine::output_pixels(unsigned int count)
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}
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// write that state as the one that will become effective in four clocks
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_upcomingEvents[_upcomingEventsPointer].state = state;
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_upcomingEvents[(_upcomingEventsPointer+4)%number_of_upcoming_events].state = state;
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// grab pixel state if desired
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if(state == OutputState::Pixel)
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{
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update_upcoming_event();
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}
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@ -245,8 +248,15 @@ void Machine::output_pixels(unsigned int count)
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if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::Playfield)
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_playfieldOutput = _upcomingEvents[_upcomingEventsPointer].playfieldOutput;
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if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::Ball)
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_pixelCounters.ball = 0;
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if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::ResetPixelCounter)
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{
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for(int c = 0; c < 5; c++)
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{
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if(_upcomingEvents[_upcomingEventsPointer].pixelCounterMask & (1 << c))
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_pixelCounter[c] = 0;
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}
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_upcomingEvents[_upcomingEventsPointer].pixelCounterMask = 0;
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}
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if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::HMoveCompare)
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{
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@ -262,7 +272,7 @@ void Machine::output_pixels(unsigned int count)
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if(_hMoveCounter) _hMoveCounter--;
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_upcomingEvents[(_upcomingEventsPointer+4)%number_of_upcoming_events].updates |= Event::Action::HMoveCompare;
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_upcomingEvents[(_upcomingEventsPointer+2)%number_of_upcoming_events].updates |= Event::Action::HMoveDecrement;
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} //else printf("\n");
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}
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}
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if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::HMoveDecrement)
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@ -272,15 +282,9 @@ void Machine::output_pixels(unsigned int count)
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if(_hMoveFlags & (1 << c))
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{
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_objectCounter[c] = (_objectCounter[c] + 1)%160;
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if(c == 4)
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{
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// printf("[%d] ", _objectCounter[4]);
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_pixelCounters.ball++; // TODO: generalise this, obviously.
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}
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_pixelCounter[c] ++;
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}
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}
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// if(_hMoveFlags & (1 << 4))
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// printf("%d ", _objectCounter[4]);
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}
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_upcomingEvents[_upcomingEventsPointer].updates = 0;
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@ -320,61 +324,12 @@ void Machine::output_pixels(unsigned int count)
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// advance
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_upcomingEventsPointer = (_upcomingEventsPointer + 1)%number_of_upcoming_events;
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// update hmove
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// if(!(_horizontalTimer&3)) {
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//
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// if(_hMoveFlags) {
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// const uint8_t counterValue = _hMoveCounter ^ 0x7;
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// for(int c = 0; c < 5; c++) {
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// if(counterValue == (_objectMotion[c] >> 4)) _hMoveFlags &= ~(1 << c);
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// if(_hMoveFlags&(1 << c)) increment_object_counter(c);
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// }
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// }
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//
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// if(_hMoveIsCounting) {
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// _hMoveIsCounting = !!_hMoveCounter;
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// _hMoveCounter = (_hMoveCounter-1)&0xf;
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// }
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// }
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// if(state == OutputState::Pixel)
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// {
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// uint8_t colour = get_output_pixel();
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// if(_outputBuffer)
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// {
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// *_outputBuffer = colour;
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// _outputBuffer++;
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// }
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// }
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// else
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// {
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// fetch this for the entire blank period just to ensure it's in place when needed
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// if(!(_horizonta lTimer&3))
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// {
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// unsigned int offset = 4 + _horizontalTimer - (horizontalTimerPeriod - 160);
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// _nextPlayfieldPixel = _playfield[(offset >> 2)%40];
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// }
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// }
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/* if(_horizontalTimer < (_vBlankExtend ? 152 : 160)) {
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uint8_t throwaway_pixel;
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get_output_pixel(_outputBuffer ? &_outputBuffer[_lastOutputStateDuration] : &throwaway_pixel, 159 - _horizontalTimer);
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// increment all graphics counters
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increment_object_counter(0);
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increment_object_counter(1);
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increment_object_counter(2);
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increment_object_counter(3);
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increment_object_counter(4);
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}*/
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// advance horizontal timer, perform reset actions if requested
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_horizontalTimer = (_horizontalTimer + 1) % horizontalTimerPeriod;
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if(!_horizontalTimer)
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{
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_vBlankExtend = false;
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set_ready_line(false);
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// printf("\n");
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}
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}
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}
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@ -608,8 +563,6 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
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_hMoveFlags = 0x1f;
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_hMoveCounter = 15;
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_upcomingEvents[(_upcomingEventsPointer + 15)%number_of_upcoming_events].updates |= Event::Action::HMoveCompare;
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// _objectCounter[4] = (_objectCounter[4] + 8)%160;
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printf("%d: ", _objectMotion[4]);
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break;
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case 0x2b:
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_objectMotion[0] =
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@ -60,22 +60,22 @@ class Machine: public CPU6502::Processor<Machine> {
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struct Event {
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enum Action {
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Playfield = 1 << 0,
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Ball = 1 << 1,
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HMoveCompare = 1 << 2,
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HMoveDecrement = 1 << 3
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Playfield = 1 << 0,
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ResetPixelCounter = 1 << 1,
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HMoveCompare = 1 << 2,
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HMoveDecrement = 1 << 3,
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};
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int updates;
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int pixelCounterMask;
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uint8_t playfieldOutput;
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OutputState state;
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Event() : updates(0) {}
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Event() : updates(0), pixelCounterMask(0) {}
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} _upcomingEvents[number_of_upcoming_events];
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unsigned int _upcomingEventsPointer;
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uint8_t _playfieldOutput;
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struct {
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uint8_t ball;
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} _pixelCounters;
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// player registers
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uint8_t _playerColour[2];
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@ -106,6 +106,7 @@ class Machine: public CPU6502::Processor<Machine> {
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// object counters
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uint8_t _objectCounter[5];
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uint8_t _pixelCounter[5];
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// joystick state
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uint8_t _piaDataDirection[2];
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