mirror of
https://github.com/TomHarte/CLK.git
synced 2025-02-05 05:34:20 +00:00
Realised there's a clocking delay on starting horizontal move. Which fixes Coke Zero.
This commit is contained in:
Thomas Harte
parent
c3e719c4ab
commit
5c1e594937
@ -79,16 +79,9 @@ Machine::~Machine()
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void Machine::update_timers(int mask)
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{
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// if(_vBlankExtend) printf(".");
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// unsigned int upcomingEventsPointerPlus1 = (_upcomingEventsPointer + 1)%number_of_upcoming_events;
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unsigned int upcomingEventsPointerPlus2 = (_upcomingEventsPointer + 4)%number_of_upcoming_events;
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unsigned int upcomingEventsPointerPlus3 = (_upcomingEventsPointer + 5)%number_of_upcoming_events;
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unsigned int upcomingEventsPointerPlus4 = (_upcomingEventsPointer + 6)%number_of_upcoming_events;
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// unsigned int upcomingEventsPointerPlus5 = (_upcomingEventsPointer + 5)%number_of_upcoming_events;
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// unsigned int upcomingEventsPointerPlus6 = (_upcomingEventsPointer + 6)%number_of_upcoming_events;
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// unsigned int upcomingEventsPointerPlus7 = (_upcomingEventsPointer + 7)%number_of_upcoming_events;
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// unsigned int upcomingEventsPointerPlus8 = (_upcomingEventsPointer + 8)%number_of_upcoming_events;
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unsigned int upcomingEventsPointerPlus4 = (_upcomingEventsPointer + 4)%number_of_upcoming_events;
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unsigned int upcomingEventsPointerPlus5 = (_upcomingEventsPointer + 5)%number_of_upcoming_events;
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unsigned int upcomingEventsPointerPlus6 = (_upcomingEventsPointer + 6)%number_of_upcoming_events;
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// grab the background now, for display in four clocks
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if(mask & (1 << 5))
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@ -96,8 +89,8 @@ void Machine::update_timers(int mask)
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if(!(_horizontalTimer&3))
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{
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unsigned int offset = 4 + _horizontalTimer - (horizontalTimerPeriod - 160);
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_upcomingEvents[upcomingEventsPointerPlus2].updates |= Event::Action::Playfield;
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_upcomingEvents[upcomingEventsPointerPlus2].playfieldOutput = _playfield[(offset >> 2)%40];
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_upcomingEvents[upcomingEventsPointerPlus4].updates |= Event::Action::Playfield;
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_upcomingEvents[upcomingEventsPointerPlus4].playfieldOutput = _playfield[(offset >> 2)%40];
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}
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}
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@ -107,8 +100,8 @@ void Machine::update_timers(int mask)
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{
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if(!_objectCounter[4])
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{
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_upcomingEvents[upcomingEventsPointerPlus2].updates |= Event::Action::ResetPixelCounter;
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_upcomingEvents[upcomingEventsPointerPlus2].pixelCounterMask |= (1 << 4);
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_upcomingEvents[upcomingEventsPointerPlus4].updates |= Event::Action::ResetPixelCounter;
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_upcomingEvents[upcomingEventsPointerPlus4].pixelCounterMask |= (1 << 4);
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}
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_objectCounter[4] = (_objectCounter[4] + 1)%160;
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_pixelCounter[4] ++;
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@ -123,8 +116,7 @@ void Machine::update_timers(int mask)
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// 5/6 clocks ahead from 159
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if(_objectCounter[c] == 159)
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{
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unsigned int actionSlot = (c < 2) ? upcomingEventsPointerPlus4 : upcomingEventsPointerPlus3;
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// unsigned int actionSlot = (c < 2) ? upcomingEventsPointerPlus6 : upcomingEventsPointerPlus5;
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unsigned int actionSlot = (c < 2) ? upcomingEventsPointerPlus6 : upcomingEventsPointerPlus5;
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_upcomingEvents[actionSlot].updates |= Event::Action::ResetPixelCounter;
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_upcomingEvents[actionSlot].pixelCounterMask |= (1 << c);
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}
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@ -139,8 +131,7 @@ void Machine::update_timers(int mask)
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( _objectCounter[c] == 64 && ((repeatMask == 4) || (repeatMask == 6)) )
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)
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{
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unsigned int actionSlot = (c < 2) ? upcomingEventsPointerPlus3 : upcomingEventsPointerPlus2;
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// unsigned int actionSlot = (c < 2) ? upcomingEventsPointerPlus5 : upcomingEventsPointerPlus4;
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unsigned int actionSlot = (c < 2) ? upcomingEventsPointerPlus5 : upcomingEventsPointerPlus4;
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_upcomingEvents[actionSlot].updates |= Event::Action::ResetPixelCounter;
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_upcomingEvents[actionSlot].pixelCounterMask |= (1 << c);
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}
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@ -148,6 +139,7 @@ void Machine::update_timers(int mask)
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}
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}
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// update the pixel counters
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for(int c = 0; c < 2; c++)
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{
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if(mask & (1 << c))
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@ -168,6 +160,23 @@ void Machine::update_timers(int mask)
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_pixelCounter[c+2] ++;
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}
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}
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// determine the pixel masks
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// uint8_t playerPixels[2] = {0, 0}, missilePixels[2] = {0, 0};
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// for(int c = 0; c < 2; c++)
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// {
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// if(_playerGraphics[c]) {
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// // figure out player colour
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// int flipMask = (_playerReflection[c]&0x8) ? 0 : 7;
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// if(_pixelCounter[c] < 32)
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// playerPixels[c] = (_playerGraphics[_playerGraphicsSelector[c]][c] >> ((_pixelCounter[c] >> 2) ^ flipMask)) &1;
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// }
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//
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// if((_missileGraphicsEnable[c]&2) && !_missileGraphicsReset[c]) {
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// int missileSize = 1 << ((_playerAndMissileSize[c] >> 4)&3);
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// missilePixels[c] = (_pixelCounter[c+2] < missileSize) ? 1 : 0;
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// }
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// }
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}
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uint8_t Machine::get_output_pixel()
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@ -288,6 +297,25 @@ void Machine::output_pixels(unsigned int count)
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_upcomingEvents[_upcomingEventsPointer].pixelCounterMask = 0;
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}
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if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::HMoveSetup)
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{
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_upcomingEvents[_upcomingEventsPointer].updates |= Event::Action::HMoveCompare;
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_vBlankExtend = true;
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// clear any ongoing moves
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if(_hMoveFlags)
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{
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for(int c = 0; c < number_of_upcoming_events; c++)
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{
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_upcomingEvents[c].updates &= ~(Event::Action::HMoveCompare | Event::Action::HMoveDecrement);
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}
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}
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// schedule new moves
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_hMoveFlags = 0x1f;
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_hMoveCounter = 15;
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}
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if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::HMoveCompare)
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{
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for(int c = 0; c < 5; c++)
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@ -303,10 +331,6 @@ void Machine::output_pixels(unsigned int count)
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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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}
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// else
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// {
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// _vBlankExtend = false;
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// }
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}
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if(_upcomingEvents[_upcomingEventsPointer].updates & Event::Action::HMoveDecrement)
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@ -600,50 +624,10 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
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break;
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case 0x2a:
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_vBlankExtend = true;
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// clear any ongoing moves
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if(_hMoveFlags)
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{
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for(int c = 0; c < number_of_upcoming_events; c++)
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{
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_upcomingEvents[c].updates &= ~(Event::Action::HMoveCompare | Event::Action::HMoveDecrement);
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}
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}
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// schedule new moves
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_hMoveFlags = 0x1f;
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_hMoveCounter = 15;
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// static int lc = 0;
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// lc++;
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// if(lc == 2813)
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// printf("{%d}", lc);
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// printf("/%d/", _horizontalTimer);
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// printf("%d [", _horizontalTimer);
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// for(int c = 0; c < 5; c++)
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// {
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// printf("%d ", _objectMotion[c] >> 4);
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// }
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// printf("]");
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// printf("[");
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// for(int c = 0; c < 5; c++)
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// {
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// printf("%d ", _objectCounter[c]);
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// }
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// printf("]\n");
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// for(int c = 0; c < 5; c++)
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// {
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// if(_objectMotion[c] >> 4)
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// printf("!");
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// }
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// justification for +5: "we need to wait at least 71 [clocks] before the HMOVE operation is complete";
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// which will take 16*4 + 2 = 66 cycles from the first compare, implying the first compare must be
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// in five cycles from now
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_upcomingEvents[(_upcomingEventsPointer + 5)%number_of_upcoming_events].updates |= Event::Action::HMoveCompare;
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_upcomingEvents[(_upcomingEventsPointer + 5)%number_of_upcoming_events].updates |= Event::Action::HMoveSetup;
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break;
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case 0x2b:
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_objectMotion[0] =
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@ -64,15 +64,18 @@ class Machine: public CPU6502::Processor<Machine> {
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ResetPixelCounter = 1 << 3,
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HMoveCompare = 1 << 4,
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HMoveDecrement = 1 << 5,
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HMoveSetup = 1 << 4,
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HMoveCompare = 1 << 5,
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HMoveDecrement = 1 << 6,
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};
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int updates;
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int pixelCounterMask;
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uint8_t playfieldOutput, player0Output, player1Output;
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OutputState state;
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uint8_t playfieldOutput, playerOutput[2];
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uint8_t ballPixel;
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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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