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This is now approximately back to where it was on Cosmic Ark.

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This commit is contained in:
Thomas Harte 2016-05-19 08:30:10 -04:00
parent 40600b4bcb
commit cf5b8ab92e
1 changed files with 6 additions and 2 deletions
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8
Machines/Atari2600/Atari2600.cpp
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@ -268,7 +268,7 @@ void Machine::output_pixels(unsigned int count)
{ {
for(int c = 0; c < 5; c++) for(int c = 0; c < 5; c++)
{ {
if(((_objectMotion[c] >> 4)^8^_hMoveCounter) == 0xf) if(((_objectMotion[c] >> 4)^_hMoveCounter) == 7)
{ {
_hMoveFlags &= ~(1 << c); _hMoveFlags &= ~(1 << c);
} }
@ -569,7 +569,11 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
// schedule new moves // schedule new moves
_hMoveFlags = 0x1f; _hMoveFlags = 0x1f;
_hMoveCounter = 15; _hMoveCounter = 15;
_upcomingEvents[(_upcomingEventsPointer + 15)%number_of_upcoming_events].updates |= Event::Action::HMoveCompare;
// justification for +5: "we need to wait at least 71 [clocks] before the HMOVE operation is complete";
// which will take 16*4 + 2 = 66 cycles from the first compare, implying the first compare must be
// in five cycles from now
_upcomingEvents[(_upcomingEventsPointer + 5)%number_of_upcoming_events].updates |= Event::Action::HMoveCompare;
break; break;
case 0x2b: case 0x2b:
_objectMotion[0] = _objectMotion[0] =