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C64: Sprite collision interrupts do not fire if the collision registers are not already clear

This commit is contained in:
SaxxonPike 2019-07-28 09:44:47 -05:00
parent f4c64ddf38
commit cc077ac459
3 changed files with 28 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Vic.Render.cs
View File

@ -196,7 +196,7 @@
_sprOwner = -1;
_sprSense = false;
for (_sprIndex = 0; _sprIndex < 8; _sprIndex++)
for (_sprIndex = 7; _sprIndex >= 0; _sprIndex--)
{
_spr = _sprites[_sprIndex];
_sprData = 0;
@ -246,34 +246,35 @@
// sprite-sprite collision
if (_sprSense)
{
// "One any collision bit within a register is set high, subsequent
// collisions will not set the interrupt latch until that collision register
// has been cleared to all "0"s by a read."
_intSpriteCollision |= !_intSpriteCollisionTriggered;
_spr.CollideSprite = true;
_sprites[_sprOwner].CollideSprite = true;
_intSpriteCollision = true;
}
else
_sprSense = true;
_sprOwner = _sprIndex;
_sprPriority = _spr.Priority;
switch (_sprData)
{
_sprSense = true;
_sprOwner = _sprIndex;
_sprPriority = _spr.Priority;
switch (_sprData)
{
case SrSpriteMask1:
_sprDecode = ColorRegisterSelect.SpriteMc0;
break;
case SrSpriteMask2:
_sprDecode = ColorRegisterSelect.Sprite0 + _sprOwner;
break;
case SrSpriteMask3:
_sprDecode = ColorRegisterSelect.SpriteMc1;
break;
}
case SrSpriteMask1:
_sprDecode = ColorRegisterSelect.SpriteMc0;
break;
case SrSpriteMask2:
_sprDecode = ColorRegisterSelect.Sprite0 + _sprOwner;
break;
case SrSpriteMask3:
_sprDecode = ColorRegisterSelect.SpriteMc1;
break;
}
// sprite-data collision
if (_gfxSense)
{
_spr.CollideData = true;
_intSpriteDataCollision = true;
_intSpriteDataCollision = !_intSpriteDataCollisionTriggered;
}
}
}

6
BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Vic.State.cs
View File

@ -39,7 +39,9 @@ namespace BizHawk.Emulation.Cores.Computers.Commodore64.MOS
private bool _intLightPen;
private bool _intRaster;
private bool _intSpriteCollision;
private bool _intSpriteCollisionTriggered;
private bool _intSpriteDataCollision;
private bool _intSpriteDataCollisionTriggered;
private int _lightPenX;
private int _lightPenY;
private bool _multicolorMode;
@ -112,7 +114,9 @@ namespace BizHawk.Emulation.Cores.Computers.Commodore64.MOS
_intLightPen = false;
_intRaster = false;
_intSpriteCollision = false;
_intSpriteCollisionTriggered = false;
_intSpriteDataCollision = false;
_intSpriteDataCollisionTriggered = false;
_irqBuffer = 0;
_lightPenX = 0;
_lightPenY = 0;
@ -189,7 +193,9 @@ namespace BizHawk.Emulation.Cores.Computers.Commodore64.MOS
ser.Sync(nameof(_intLightPen), ref _intLightPen);
ser.Sync(nameof(_intRaster), ref _intRaster);
ser.Sync(nameof(_intSpriteCollision), ref _intSpriteCollision);
ser.Sync(nameof(_intSpriteCollisionTriggered), ref _intSpriteCollision);
ser.Sync(nameof(_intSpriteDataCollision), ref _intSpriteDataCollision);
ser.Sync(nameof(_intSpriteDataCollisionTriggered), ref _intSpriteDataCollision);
ser.Sync(nameof(_irqBuffer), ref _irqBuffer);
ser.Sync(nameof(_lightPenX), ref _lightPenX);
ser.Sync(nameof(_lightPenY), ref _lightPenY);

4
BizHawk.Emulation.Cores/Computers/Commodore64/MOS/Vic.cs
View File

@ -233,16 +233,16 @@ namespace BizHawk.Emulation.Cores.Computers.Commodore64.MOS
spr.CollideData = false;
}
_spriteBackgroundCollisionClearPending = false;
_intSpriteDataCollisionTriggered = false;
}
// sprite collision clear
if (_spriteSpriteCollisionClearPending)
{
foreach (var spr in _sprites)
{
spr.CollideSprite = false;
}
_spriteSpriteCollisionClearPending = false;
_intSpriteCollisionTriggered = false;
}
// raster IRQ is edge triggered