diff --git a/stella/src/emucore/TIA.cxx b/stella/src/emucore/TIA.cxx index fdc25a42e..91a3c0c03 100644 --- a/stella/src/emucore/TIA.cxx +++ b/stella/src/emucore/TIA.cxx @@ -13,7 +13,7 @@ // See the file "license" for information on usage and redistribution of // this file, and for a DISCLAIMER OF ALL WARRANTIES. // -// $Id: TIA.cxx,v 1.2 2001-12-30 18:38:54 bwmott Exp $ +// $Id: TIA.cxx,v 1.3 2002-01-13 04:26:42 bwmott Exp $ //============================================================================ #include @@ -1560,53 +1560,51 @@ uInt8 TIA::peek(uInt16 addr) // Update frame to current color clock before we look at anything! updateFrame(mySystem->cycles() * 3); - uInt8 noise = mySystem->getDataBusState(); - uInt8 noise1 = noise & 0x7F; - uInt8 noise2 = noise & 0x3F; + uInt8 noise = mySystem->getDataBusState() & 0x3F; switch(addr & 0x000f) { case 0x00: // CXM0P return ((myCollision & 0x0001) ? 0x80 : 0x00) | - ((myCollision & 0x0002) ? 0x40 : 0x00) | noise2; + ((myCollision & 0x0002) ? 0x40 : 0x00) | noise; case 0x01: // CXM1P return ((myCollision & 0x0004) ? 0x80 : 0x00) | - ((myCollision & 0x0008) ? 0x40 : 0x00) | noise2; + ((myCollision & 0x0008) ? 0x40 : 0x00) | noise; case 0x02: // CXP0FB return ((myCollision & 0x0010) ? 0x80 : 0x00) | - ((myCollision & 0x0020) ? 0x40 : 0x00) | noise2; + ((myCollision & 0x0020) ? 0x40 : 0x00) | noise; case 0x03: // CXP1FB return ((myCollision & 0x0040) ? 0x80 : 0x00) | - ((myCollision & 0x0080) ? 0x40 : 0x00) | noise2; + ((myCollision & 0x0080) ? 0x40 : 0x00) | noise; case 0x04: // CXM0FB return ((myCollision & 0x0100) ? 0x80 : 0x00) | - ((myCollision & 0x0200) ? 0x40 : 0x00) | noise2; + ((myCollision & 0x0200) ? 0x40 : 0x00) | noise; case 0x05: // CXM1FB return ((myCollision & 0x0400) ? 0x80 : 0x00) | - ((myCollision & 0x0800) ? 0x40 : 0x00) | noise2; + ((myCollision & 0x0800) ? 0x40 : 0x00) | noise; case 0x06: // CXBLPF - return ((myCollision & 0x1000) ? 0x80 : 0x00) | noise1; + return ((myCollision & 0x1000) ? 0x80 : 0x00) | noise; case 0x07: // CXPPMM return ((myCollision & 0x2000) ? 0x80 : 0x00) | - ((myCollision & 0x4000) ? 0x40 : 0x00) | noise2; + ((myCollision & 0x4000) ? 0x40 : 0x00) | noise; case 0x08: // INPT0 { Int32 r = myConsole.controller(Controller::Left).read(Controller::Nine); if(r == Controller::minimumResistance) { - return 0x80 | noise1; + return 0x80 | noise; } else if((r == Controller::maximumResistance) || myDumpEnabled) { - return noise1; + return noise; } else { @@ -1614,11 +1612,11 @@ uInt8 TIA::peek(uInt16 addr) uInt32 needed = (uInt32)(t * 1.19E6); if(mySystem->cycles() > (myDumpDisabledCycle + needed)) { - return 0x80 | noise1; + return 0x80 | noise; } else { - return noise1; + return noise; } } } @@ -1628,11 +1626,11 @@ uInt8 TIA::peek(uInt16 addr) Int32 r = myConsole.controller(Controller::Left).read(Controller::Five); if(r == Controller::minimumResistance) { - return 0x80 | noise1; + return 0x80 | noise; } else if((r == Controller::maximumResistance) || myDumpEnabled) { - return noise1; + return noise; } else { @@ -1640,11 +1638,11 @@ uInt8 TIA::peek(uInt16 addr) uInt32 needed = (uInt32)(t * 1.19E6); if(mySystem->cycles() > (myDumpDisabledCycle + needed)) { - return 0x80 | noise1; + return 0x80 | noise; } else { - return noise1; + return noise; } } } @@ -1654,11 +1652,11 @@ uInt8 TIA::peek(uInt16 addr) Int32 r = myConsole.controller(Controller::Right).read(Controller::Nine); if(r == Controller::minimumResistance) { - return 0x80 | noise1; + return 0x80 | noise; } else if((r == Controller::maximumResistance) || myDumpEnabled) { - return noise1; + return noise; } else { @@ -1666,11 +1664,11 @@ uInt8 TIA::peek(uInt16 addr) uInt32 needed = (uInt32)(t * 1.19E6); if(mySystem->cycles() > (myDumpDisabledCycle + needed)) { - return 0x80 | noise1; + return 0x80 | noise; } else { - return noise1; + return noise; } } } @@ -1680,11 +1678,11 @@ uInt8 TIA::peek(uInt16 addr) Int32 r = myConsole.controller(Controller::Right).read(Controller::Five); if(r == Controller::minimumResistance) { - return 0x80 | noise1; + return 0x80 | noise; } else if((r == Controller::maximumResistance) || myDumpEnabled) { - return noise1; + return noise; } else { @@ -1692,22 +1690,22 @@ uInt8 TIA::peek(uInt16 addr) uInt32 needed = (uInt32)(t * 1.19E6); if(mySystem->cycles() > (myDumpDisabledCycle + needed)) { - return 0x80 | noise1; + return 0x80 | noise; } else { - return noise1; + return noise; } } } case 0x0C: // INPT4 return myConsole.controller(Controller::Left).read(Controller::Six) ? - (0x80 | noise1) : noise1; + (0x80 | noise) : noise; case 0x0D: // INPT5 return myConsole.controller(Controller::Right).read(Controller::Six) ? - (0x80 | noise1) : noise1; + (0x80 | noise) : noise; case 0x0e: return noise;