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Fix initialization error in DPC+ scheme (fixes #489).

This commit is contained in:
Stephen Anthony 2019-06-12 09:54:40 -02:30
parent 9ba843dae9
commit 2cfffd48fe
3 changed files with 12 additions and 3 deletions
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3
Changes.txt
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@ -93,6 +93,9 @@
certain older DPC+ driver versions; this allows 'Epic Adventure' ROM certain older DPC+ driver versions; this allows 'Epic Adventure' ROM
to finally work in Stella. to finally work in Stella.
* Fixed bug in DPC+ scheme; 'fast fetch mode' was enabled at startup,
when it should be disabled by default.
* Certain buttons in the UI can now be activated repeatedly by holding * Certain buttons in the UI can now be activated repeatedly by holding
down the mouse button (Time Machine, debugger step/trace/frame advance, down the mouse button (Time Machine, debugger step/trace/frame advance,
etc.) etc.)

4
src/emucore/CartCTY.cxx
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@ -60,6 +60,10 @@ void CartridgeCTY::reset()
myRAM[0] = myRAM[1] = myRAM[2] = myRAM[3] = 0xFF; myRAM[0] = myRAM[1] = myRAM[2] = myRAM[3] = 0xFF;
myLDAimmediate = false;
myRandomNumber = 0x2B435044;
myRamAccessTimeout = 0;
myAudioCycles = 0; myAudioCycles = 0;
myFractionalClocks = 0.0; myFractionalClocks = 0.0;

8
src/emucore/CartDPCPlus.cxx
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@ -76,9 +76,6 @@ CartridgeDPCPlus::CartridgeDPCPlus(const ByteBuffer& image, uInt32 size,
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void CartridgeDPCPlus::reset() void CartridgeDPCPlus::reset()
{ {
myAudioCycles = myARMCycles = 0;
myFractionalClocks = 0.0;
setInitialState(); setInitialState();
// DPC+ always starts in bank 5 // DPC+ always starts in bank 5
@ -110,6 +107,11 @@ void CartridgeDPCPlus::setInitialState()
// Initialize the DPC's random number generator register (must be non-zero) // Initialize the DPC's random number generator register (must be non-zero)
myRandomNumber = 0x2B435044; // "DPC+" myRandomNumber = 0x2B435044; // "DPC+"
// Initialize various other parameters
myFastFetch = myLDAimmediate = false;
myAudioCycles = myARMCycles = 0;
myFractionalClocks = 0.0;
} }
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -