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Set undefined bits on TIA read from last data bus value.

This commit is contained in:
Christian Speckner 2017-02-19 15:39:54 +01:00
parent 0efbbdec45
commit 146d0afe4f
1 changed files with 11 additions and 7 deletions
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18
src/emucore/tia/TIA.cxx
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@ -288,35 +288,39 @@ uInt8 TIA::peek(uInt16 address)
break;
case CXBLPF:
result = collCXBLPF();
result = collCXBLPF() | (lastDataBusValue & 0x40);
break;
case INPT0:
updatePaddle(0);
result = myPaddleReaders[0].inpt(myTimestamp);
result = myPaddleReaders[0].inpt(myTimestamp) | (lastDataBusValue & 0x40);
break;
case INPT1:
updatePaddle(1);
result = myPaddleReaders[1].inpt(myTimestamp);
result = myPaddleReaders[1].inpt(myTimestamp) | (lastDataBusValue & 0x40);
break;
case INPT2:
updatePaddle(2);
result = myPaddleReaders[2].inpt(myTimestamp);
result = myPaddleReaders[2].inpt(myTimestamp) | (lastDataBusValue & 0x40);
break;
case INPT3:
updatePaddle(3);
result = myPaddleReaders[3].inpt(myTimestamp);
result = myPaddleReaders[3].inpt(myTimestamp) | (lastDataBusValue & 0x40);
break;
case INPT4:
result = myInput0.inpt(!myConsole.leftController().read(Controller::Six));
result =
myInput0.inpt(!myConsole.leftController().read(Controller::Six)) |
(lastDataBusValue & 0x40);
break;
case INPT5:
result = myInput1.inpt(!myConsole.rightController().read(Controller::Six));
result =
myInput1.inpt(!myConsole.rightController().read(Controller::Six)) |
(lastDataBusValue & 0x40);
break;
default: