mirror of https://github.com/stella-emu/stella.git
Added 'CV+' bankswitching scheme.
git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@3253 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
This commit is contained in:
stephena
parent
821f22c205
commit
143b22baec
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@ -18,7 +18,7 @@
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- Added ability to specify the maximum range of movement for paddles
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when using a mouse or digital device to emulate the paddle. This is
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needed, since on a real console most paddle games use very little of
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useful since on a real console most paddle games use very little of
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the paddle range, and could result in moving the mouse onscreen with
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nothing appearing to happen (when in effect it was as if you turned
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a real paddle all the way to the end of the range). This eliminates
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@ -39,6 +39,10 @@
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ROM properties was being stored in the external file when it was
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exactly the same as the internal entry.
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* Added 'CV+' bankswitching scheme, developed by myself and LS_Dracon
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(of AtariAge). This scheme contains RAM like the CV scheme, and
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also switchable 2K ROM segments by writing to $3D.
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* Added more C++11 updates all over the codebase, and ran Stella
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through Coverity for the first time. I'm proud to say that Stella
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now has a 0.00 defect rate!
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@ -3224,6 +3224,7 @@ Ms Pac-Man (Stella extended codes):
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<tr><td>BFSC </td><td>CPUWIZ 256K + ram</td></tr>
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<tr><td>CM ¹</td><td>Spectravideo CompuMate </td></tr>
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<tr><td>CV </td><td>Commavid extra ram </td></tr>
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<tr><td>CV+ </td><td>Extended Commavid extra ram</td></tr>
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<tr><td>DASH </td><td>Boulder Dash 2 </td></tr>
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<tr><td>DF </td><td>CPUWIZ 128K </td></tr>
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<tr><td>DFSC </td><td>CPUWIZ 128K + ram</td></tr>
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@ -0,0 +1,154 @@
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//============================================================================
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//
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// SSSS tt lll lll
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// SS SS tt ll ll
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// SS tttttt eeee ll ll aaaa
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// SSSS tt ee ee ll ll aa
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// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
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// SS SS tt ee ll ll aa aa
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// SSSS ttt eeeee llll llll aaaaa
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//
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// Copyright (c) 1995-2016 by Bradford W. Mott, Stephen Anthony
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// and the Stella Team
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//
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// See the file "License.txt" for information on usage and redistribution of
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// this file, and for a DISCLAIMER OF ALL WARRANTIES.
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//
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// $Id$
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//============================================================================
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#include "CartCVPlus.hxx"
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#include "PopUpWidget.hxx"
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#include "CartCVPlusWidget.hxx"
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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CartridgeCVPlusWidget::CartridgeCVPlusWidget(
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GuiObject* boss, const GUI::Font& lfont, const GUI::Font& nfont,
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int x, int y, int w, int h, CartridgeCVPlus& cart)
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: CartDebugWidget(boss, lfont, nfont, x, y, w, h),
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myCart(cart)
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{
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uInt32 size = cart.mySize;
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ostringstream info;
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info << "LS_Dracon CV+ cartridge, 1K RAM, 2-256 2K ROM\n"
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<< "1024 bytes RAM @ $F000 - $F7FF\n"
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<< " $F000 - $F3FF (R), $F400 - $F7FF (W)\n"
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<< "2048 bytes ROM @ $F800 - $FFFF, by writing to $3D\n"
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<< "Startup bank = " << cart.myStartBank << "\n";
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int xpos = 10,
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ypos = addBaseInformation(size, "LS_Dracon / Stephen Anthony",
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info.str()) + myLineHeight;
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VariantList items;
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for(uInt16 i = 0; i < cart.bankCount(); ++i)
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VarList::push_back(items, Variant(i).toString() + " ($3D)");
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ostringstream label;
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label << "Set bank ($F800 - $FFFF): ";
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myBank =
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new PopUpWidget(boss, _font, xpos, ypos-2, _font.getStringWidth("xxx ($3D) "),
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myLineHeight, items, label.str(),
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_font.getStringWidth(label.str()), kBankChanged);
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myBank->setTarget(this);
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addFocusWidget(myBank);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void CartridgeCVPlusWidget::loadConfig()
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{
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myBank->setSelectedIndex(myCart.myCurrentBank);
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CartDebugWidget::loadConfig();
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void CartridgeCVPlusWidget::handleCommand(CommandSender* sender,
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int cmd, int data, int id)
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{
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if(cmd == kBankChanged)
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{
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myCart.unlockBank();
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myCart.bank(myBank->getSelected());
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myCart.lockBank();
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invalidate();
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}
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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string CartridgeCVPlusWidget::bankState()
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{
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ostringstream& buf = buffer();
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buf << "Bank = " << dec << myCart.myCurrentBank << ", hotspot = $3D";
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return buf.str();
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void CartridgeCVPlusWidget::saveOldState()
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{
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myOldState.internalram.clear();
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for(uInt32 i = 0; i < this->internalRamSize();i++)
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myOldState.internalram.push_back(myCart.myRAM[i]);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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uInt32 CartridgeCVPlusWidget::internalRamSize()
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{
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return 1024;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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uInt32 CartridgeCVPlusWidget::internalRamRPort(int start)
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{
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return 0xF000 + start;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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string CartridgeCVPlusWidget::internalRamDescription()
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{
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ostringstream desc;
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desc << "$F000 - $F3FF used for Read Access\n"
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<< "$F400 - $F7FF used for Write Access";
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return desc.str();
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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const ByteArray& CartridgeCVPlusWidget::internalRamOld(int start, int count)
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{
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myRamOld.clear();
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for(int i = 0; i < count; i++)
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myRamOld.push_back(myOldState.internalram[start + i]);
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return myRamOld;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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const ByteArray& CartridgeCVPlusWidget::internalRamCurrent(int start, int count)
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{
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myRamCurrent.clear();
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for(int i = 0; i < count; i++)
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myRamCurrent.push_back(myCart.myRAM[start + i]);
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return myRamCurrent;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void CartridgeCVPlusWidget::internalRamSetValue(int addr, uInt8 value)
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{
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myCart.myRAM[addr] = value;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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uInt8 CartridgeCVPlusWidget::internalRamGetValue(int addr)
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{
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return myCart.myRAM[addr];
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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string CartridgeCVPlusWidget::internalRamLabel(int addr)
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{
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CartDebug& dbg = instance().debugger().cartDebug();
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return dbg.getLabel(addr + 0xF000, false);
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}
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@ -0,0 +1,74 @@
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//============================================================================
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//
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// SSSS tt lll lll
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// SS SS tt ll ll
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// SS tttttt eeee ll ll aaaa
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// SSSS tt ee ee ll ll aa
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// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
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// SS SS tt ee ll ll aa aa
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// SSSS ttt eeeee llll llll aaaaa
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//
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// Copyright (c) 1995-2016 by Bradford W. Mott, Stephen Anthony
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// and the Stella Team
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//
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// See the file "License.txt" for information on usage and redistribution of
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// this file, and for a DISCLAIMER OF ALL WARRANTIES.
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//
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// $Id$
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//============================================================================
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#ifndef CARTRIDGECVPlus_WIDGET_HXX
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#define CARTRIDGECVPlus_WIDGET_HXX
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class CartridgeCVPlus;
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class PopUpWidget;
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#include "CartDebugWidget.hxx"
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class CartridgeCVPlusWidget : public CartDebugWidget
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{
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public:
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CartridgeCVPlusWidget(GuiObject* boss, const GUI::Font& lfont,
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const GUI::Font& nfont,
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int x, int y, int w, int h,
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CartridgeCVPlus& cart);
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virtual ~CartridgeCVPlusWidget() = default;
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private:
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CartridgeCVPlus& myCart;
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PopUpWidget* myBank;
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struct CartState {
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ByteArray internalram;
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};
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CartState myOldState;
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enum { kBankChanged = 'bkCH' };
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private:
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void loadConfig() override;
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void handleCommand(CommandSender* sender, int cmd, int data, int id) override;
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string bankState() override;
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void saveOldState() override;
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// start of functions for Cartridge RAM tab
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uInt32 internalRamSize() override;
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uInt32 internalRamRPort(int start) override;
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string internalRamDescription() override;
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const ByteArray& internalRamOld(int start, int count) override;
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const ByteArray& internalRamCurrent(int start, int count) override;
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void internalRamSetValue(int addr, uInt8 value) override;
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uInt8 internalRamGetValue(int addr) override;
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string internalRamLabel(int addr) override;
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// end of functions for Cartridge RAM tab
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// Following constructors and assignment operators not supported
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CartridgeCVPlusWidget() = delete;
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CartridgeCVPlusWidget(const CartridgeCVPlusWidget&) = delete;
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CartridgeCVPlusWidget(CartridgeCVPlusWidget&&) = delete;
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CartridgeCVPlusWidget& operator=(const CartridgeCVPlusWidget&) = delete;
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CartridgeCVPlusWidget& operator=(CartridgeCVPlusWidget&&) = delete;
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};
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#endif
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@ -46,12 +46,9 @@ CartridgeCVWidget::CartridgeCVWidget(
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void CartridgeCVWidget::saveOldState()
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{
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myOldState.internalram.clear();
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for(uInt32 i = 0; i < this->internalRamSize();i++)
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{
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myOldState.internalram.push_back(myCart.myRAM[i]);
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}
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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uInt32 CartridgeCVWidget::internalRamSize()
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@ -111,4 +108,3 @@ string CartridgeCVWidget::internalRamLabel(int addr)
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CartDebug& dbg = instance().debugger().cartDebug();
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return dbg.getLabel(addr + 0xF000, false);
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}
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@ -33,6 +33,7 @@ MODULE_OBJS := \
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src/debugger/gui/CartCMWidget.o \
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src/debugger/gui/CartCTYWidget.o \
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src/debugger/gui/CartCVWidget.o \
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src/debugger/gui/CartCVPlusWidget.o \
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src/debugger/gui/CartDASHWidget.o \
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src/debugger/gui/CartDPCWidget.o \
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src/debugger/gui/CartDPCPlusWidget.o \
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@ -34,6 +34,7 @@
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#include "CartCM.hxx"
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#include "CartCTY.hxx"
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#include "CartCV.hxx"
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#include "CartCVPlus.hxx"
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#include "CartDASH.hxx"
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#include "CartDPC.hxx"
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#include "CartDPCPlus.hxx"
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@ -207,6 +208,8 @@ unique_ptr<Cartridge> Cartridge::create(const BytePtr& img, uInt32 size,
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cartridge = make_ptr<CartridgeCTY>(image, size, osystem);
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else if(type == "CV")
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cartridge = make_ptr<CartridgeCV>(image, size, settings);
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else if(type == "CV+")
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cartridge = make_ptr<CartridgeCVPlus>(image, size, settings);
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else if(type == "DASH")
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cartridge = make_ptr<CartridgeDASH>(image, size, settings);
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else if(type == "DPC")
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@ -372,7 +375,11 @@ string Cartridge::autodetectType(const uInt8* image, uInt32 size)
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// Guess type based on size
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const char* type = nullptr;
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if((size % 8448) == 0 || size == 6144)
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if(isProbablyCVPlus(image,size))
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{
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type = "CV+";
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}
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else if((size % 8448) == 0 || size == 6144)
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{
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type = "AR";
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}
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@ -698,6 +705,16 @@ bool Cartridge::isProbablyCV(const uInt8* image, uInt32 size)
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return searchForBytes(image, size, signature[1], 3, 1);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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bool Cartridge::isProbablyCVPlus(const uInt8* image, uInt32)
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{
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// CV+ cart is identified key 'commavidplus' @ $04 in the ROM
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// We inspect only this area to speed up the search
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uInt8 signature[12] = { 'c', 'o', 'm', 'm', 'a', 'v', 'i', 'd',
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'p', 'l', 'u', 's' };
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return searchForBytes(image+4, 24, signature, 12, 1);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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bool Cartridge::isProbablyDASH(const uInt8* image, uInt32 size)
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{
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@ -973,6 +990,7 @@ Cartridge::BankswitchType Cartridge::ourBSList[] = {
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{ "BF", "BF (CPUWIZ 256K)" },
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{ "BFSC", "BFSC (CPUWIZ 256K + ram)" },
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{ "CV", "CV (Commavid extra ram)" },
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{ "CV+", "CV+ (Extended Commavid)" },
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{ "CM", "CM (SpectraVideo CompuMate)" },
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{ "DASH", "DASH (Experimental)" },
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{ "DF", "DF (CPUWIZ 128K)" },
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@ -194,7 +194,7 @@ class Cartridge : public Device
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const char* type;
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const char* desc;
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};
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enum { ourNumBSTypes = 45 };
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enum { ourNumBSTypes = 46 };
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static BankswitchType ourBSList[ourNumBSTypes];
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protected:
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@ -305,6 +305,11 @@ class Cartridge : public Device
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*/
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static bool isProbablyCV(const uInt8* image, uInt32 size);
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/**
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Returns true if the image is probably a CV+ bankswitching cartridge
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*/
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static bool isProbablyCVPlus(const uInt8* image, uInt32 size);
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/**
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Returns true if the image is probably a DASH bankswitching cartridge
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*/
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@ -0,0 +1,248 @@
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//============================================================================
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//
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// SSSS tt lll lll
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// SS SS tt ll ll
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// SS tttttt eeee ll ll aaaa
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// SSSS tt ee ee ll ll aa
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// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
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// SS SS tt ee ll ll aa aa
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// SSSS ttt eeeee llll llll aaaaa
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//
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// Copyright (c) 1995-2016 by Bradford W. Mott, Stephen Anthony
|
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// and the Stella Team
|
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//
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||||
// See the file "License.txt" for information on usage and redistribution of
|
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// this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||||
//
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||||
// $Id$
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//============================================================================
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#include <cstring>
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#include "System.hxx"
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#include "TIA.hxx"
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#include "CartCVPlus.hxx"
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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CartridgeCVPlus::CartridgeCVPlus(const uInt8* image, uInt32 size,
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const Settings& settings)
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: Cartridge(settings),
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myImage(nullptr),
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mySize(size),
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myCurrentBank(0)
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{
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// Allocate array for the ROM image
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myImage = make_ptr<uInt8[]>(mySize);
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// Copy the ROM image into my buffer
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memcpy(myImage.get(), image, mySize);
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createCodeAccessBase(mySize + 1024);
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// Remember startup bank
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myStartBank = 0;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void CartridgeCVPlus::reset()
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{
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// Initialize RAM
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if(mySettings.getBool("ramrandom"))
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for(uInt32 i = 0; i < 1024; ++i)
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myRAM[i] = mySystem->randGenerator().next();
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else
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memset(myRAM, 0, 1024);
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// We'll map the startup bank into the first segment upon reset
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||||
bank(myStartBank);
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
void CartridgeCVPlus::install(System& system)
|
||||
{
|
||||
mySystem = &system;
|
||||
|
||||
System::PageAccess access(this, System::PA_READWRITE);
|
||||
|
||||
// Set the page accessing methods for the hot spots (for 100% emulation
|
||||
// we need to chain any accesses below 0x40 to the TIA. Our poke() method
|
||||
// does this via mySystem->tiaPoke(...), at least until we come up with a
|
||||
// cleaner way to do it).
|
||||
for(uInt32 i = 0x00; i < 0x40; i += (1 << System::PAGE_SHIFT))
|
||||
mySystem->setPageAccess(i >> System::PAGE_SHIFT, access);
|
||||
|
||||
// Set the page accessing method for the RAM writing pages
|
||||
access.directPeekBase = 0;
|
||||
access.codeAccessBase = 0;
|
||||
access.type = System::PA_WRITE;
|
||||
for(uInt32 j = 0x1400; j < 0x1800; j += (1 << System::PAGE_SHIFT))
|
||||
{
|
||||
access.directPokeBase = &myRAM[j & 0x03FF];
|
||||
access.codeAccessBase = &myCodeAccessBase[mySize + (j & 0x03FF)];
|
||||
mySystem->setPageAccess(j >> System::PAGE_SHIFT, access);
|
||||
}
|
||||
|
||||
// Set the page accessing method for the RAM reading pages
|
||||
access.directPokeBase = 0;
|
||||
access.type = System::PA_READ;
|
||||
for(uInt32 k = 0x1000; k < 0x1400; k += (1 << System::PAGE_SHIFT))
|
||||
{
|
||||
access.directPeekBase = &myRAM[k & 0x03FF];
|
||||
access.codeAccessBase = &myCodeAccessBase[mySize + (k & 0x03FF)];
|
||||
mySystem->setPageAccess(k >> System::PAGE_SHIFT, access);
|
||||
}
|
||||
|
||||
// Install pages for the startup bank into the first segment
|
||||
bank(myStartBank);
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
uInt8 CartridgeCVPlus::peek(uInt16 address)
|
||||
{
|
||||
if((address & 0x0FFF) < 0x0800) // Write port is at 0xF400 - 0xF800 (1024 bytes)
|
||||
{ // Read port is handled in ::install()
|
||||
// Reading from the write port triggers an unwanted write
|
||||
uInt8 value = mySystem->getDataBusState(0xFF);
|
||||
|
||||
if(bankLocked())
|
||||
return value;
|
||||
else
|
||||
{
|
||||
triggerReadFromWritePort(address);
|
||||
return myRAM[address & 0x03FF] = value;
|
||||
}
|
||||
}
|
||||
else
|
||||
return myImage[(address & 0x07FF) + (myCurrentBank << 11)];
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
bool CartridgeCVPlus::poke(uInt16 address, uInt8 value)
|
||||
{
|
||||
address &= 0x0FFF;
|
||||
|
||||
// Switch banks if necessary
|
||||
if(address == 0x003D)
|
||||
bank(value);
|
||||
|
||||
// Pass the poke through to the TIA. In a real Atari, both the cart and the
|
||||
// TIA see the address lines, and both react accordingly. In Stella, each
|
||||
// 64-byte chunk of address space is "owned" by only one device. If we
|
||||
// don't chain the poke to the TIA, then the TIA can't see it...
|
||||
mySystem->tia().poke(address, value);
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
bool CartridgeCVPlus::bank(uInt16 bank)
|
||||
{
|
||||
if(bankLocked()) return false;
|
||||
|
||||
// Make sure the bank they're asking for is reasonable
|
||||
if((uInt32(bank) << 11) < mySize)
|
||||
{
|
||||
myCurrentBank = bank;
|
||||
}
|
||||
else
|
||||
{
|
||||
// Oops, the bank they're asking for isn't valid so let's wrap it
|
||||
// around to a valid bank number
|
||||
myCurrentBank = bank % (mySize >> 11);
|
||||
}
|
||||
cerr << "bank: " << myCurrentBank << endl;
|
||||
|
||||
uInt32 offset = myCurrentBank << 11;
|
||||
|
||||
// Setup the page access methods for the current bank
|
||||
System::PageAccess access(this, System::PA_READ);
|
||||
|
||||
// Map ROM image into the system
|
||||
for(uInt32 address = 0x1800; address < 0x2000;
|
||||
address += (1 << System::PAGE_SHIFT))
|
||||
{
|
||||
access.directPeekBase = &myImage[offset + (address & 0x07FF)];
|
||||
access.codeAccessBase = &myCodeAccessBase[offset + (address & 0x07FF)];
|
||||
mySystem->setPageAccess(address >> System::PAGE_SHIFT, access);
|
||||
}
|
||||
|
||||
return myBankChanged = true;
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
uInt16 CartridgeCVPlus::getBank() const
|
||||
{
|
||||
return myCurrentBank;
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
uInt16 CartridgeCVPlus::bankCount() const
|
||||
{
|
||||
return mySize >> 11;
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
bool CartridgeCVPlus::patch(uInt16 address, uInt8 value)
|
||||
{
|
||||
address &= 0x0FFF;
|
||||
|
||||
if(address < 0x0800)
|
||||
{
|
||||
// Normally, a write to the read port won't do anything
|
||||
// However, the patch command is special in that ignores such
|
||||
// cart restrictions
|
||||
// The following will work for both reads and writes
|
||||
myRAM[address & 0x03FF] = value;
|
||||
}
|
||||
else
|
||||
myImage[(address & 0x07FF) + (myCurrentBank << 11)] = value;
|
||||
|
||||
return myBankChanged = true;
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
const uInt8* CartridgeCVPlus::getImage(int& size) const
|
||||
{
|
||||
size = mySize;
|
||||
return myImage.get();
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
bool CartridgeCVPlus::save(Serializer& out) const
|
||||
{
|
||||
try
|
||||
{
|
||||
out.putString(name());
|
||||
out.putShort(myCurrentBank);
|
||||
out.putByteArray(myRAM, 1024);
|
||||
}
|
||||
catch(...)
|
||||
{
|
||||
cerr << "ERROR: CartridgeCVPlus::save" << endl;
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
bool CartridgeCVPlus::load(Serializer& in)
|
||||
{
|
||||
try
|
||||
{
|
||||
if(in.getString() != name())
|
||||
return false;
|
||||
|
||||
myCurrentBank = in.getShort();
|
||||
in.getByteArray(myRAM, 1024);
|
||||
}
|
||||
catch(...)
|
||||
{
|
||||
cerr << "ERROR: CartridgeCVPlus::load" << endl;
|
||||
return false;
|
||||
}
|
||||
|
||||
// Now, go to the current bank
|
||||
bank(myCurrentBank);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
|
@ -0,0 +1,188 @@
|
|||
//============================================================================
|
||||
//
|
||||
// SSSS tt lll lll
|
||||
// SS SS tt ll ll
|
||||
// SS tttttt eeee ll ll aaaa
|
||||
// SSSS tt ee ee ll ll aa
|
||||
// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
|
||||
// SS SS tt ee ll ll aa aa
|
||||
// SSSS ttt eeeee llll llll aaaaa
|
||||
//
|
||||
// Copyright (c) 1995-2016 by Bradford W. Mott, Stephen Anthony
|
||||
// and the Stella Team
|
||||
//
|
||||
// See the file "License.txt" for information on usage and redistribution of
|
||||
// this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||||
//
|
||||
// $Id$
|
||||
//============================================================================
|
||||
|
||||
#ifndef CARTRIDGECVPlus_HXX
|
||||
#define CARTRIDGECVPlus_HXX
|
||||
|
||||
class System;
|
||||
|
||||
#include "bspf.hxx"
|
||||
#include "Cart.hxx"
|
||||
#ifdef DEBUGGER_SUPPORT
|
||||
#include "CartCVPlusWidget.hxx"
|
||||
#endif
|
||||
|
||||
/**
|
||||
Cartridge class based on both Commavid and 3F/3E schemes:
|
||||
|
||||
Commavid (RAM):
|
||||
$F000-$F3FF read from RAM
|
||||
$F400-$F7FF write to RAM
|
||||
|
||||
3F/3E (ROM):
|
||||
$F800-$FFFF ROM
|
||||
|
||||
In this bankswitching scheme the 2600's 4K cartridge
|
||||
address space is broken into two 2K segments. The lower 2K
|
||||
is RAM, as decribed above (same as CV/Commavid scheme).
|
||||
To map ROM, the desired bank number of the upper 2K segment is
|
||||
selected by storing its value into $3D.
|
||||
|
||||
@author Stephen Anthony, LS_Dracon
|
||||
@version $Id$
|
||||
*/
|
||||
|
||||
class CartridgeCVPlus : public Cartridge
|
||||
{
|
||||
friend class CartridgeCVPlusWidget;
|
||||
|
||||
public:
|
||||
/**
|
||||
Create a new cartridge using the specified image and size
|
||||
|
||||
@param image Pointer to the ROM image
|
||||
@param size The size of the ROM image
|
||||
@param settings A reference to the various settings (read-only)
|
||||
*/
|
||||
CartridgeCVPlus(const uInt8* image, uInt32 size, const Settings& settings);
|
||||
virtual ~CartridgeCVPlus() = default;
|
||||
|
||||
public:
|
||||
/**
|
||||
Reset device to its power-on state
|
||||
*/
|
||||
void reset() override;
|
||||
|
||||
/**
|
||||
Install cartridge in the specified system. Invoked by the system
|
||||
when the cartridge is attached to it.
|
||||
|
||||
@param system The system the device should install itself in
|
||||
*/
|
||||
void install(System& system) override;
|
||||
|
||||
/**
|
||||
Install pages for the specified bank in the system.
|
||||
|
||||
@param bank The bank that should be installed in the system
|
||||
*/
|
||||
bool bank(uInt16 bank) override;
|
||||
|
||||
/**
|
||||
Get the current bank.
|
||||
*/
|
||||
uInt16 getBank() const override;
|
||||
|
||||
/**
|
||||
Query the number of banks supported by the cartridge.
|
||||
*/
|
||||
uInt16 bankCount() const override;
|
||||
|
||||
/**
|
||||
Patch the cartridge ROM.
|
||||
|
||||
@param address The ROM address to patch
|
||||
@param value The value to place into the address
|
||||
@return Success or failure of the patch operation
|
||||
*/
|
||||
bool patch(uInt16 address, uInt8 value) override;
|
||||
|
||||
/**
|
||||
Access the internal ROM image for this cartridge.
|
||||
|
||||
@param size Set to the size of the internal ROM image data
|
||||
@return A pointer to the internal ROM image data
|
||||
*/
|
||||
const uInt8* getImage(int& size) const override;
|
||||
|
||||
/**
|
||||
Save the current state of this cart to the given Serializer.
|
||||
|
||||
@param out The Serializer object to use
|
||||
@return False on any errors, else true
|
||||
*/
|
||||
bool save(Serializer& out) const override;
|
||||
|
||||
/**
|
||||
Load the current state of this cart from the given Serializer.
|
||||
|
||||
@param in The Serializer object to use
|
||||
@return False on any errors, else true
|
||||
*/
|
||||
bool load(Serializer& in) override;
|
||||
|
||||
/**
|
||||
Get a descriptor for the device name (used in error checking).
|
||||
|
||||
@return The name of the object
|
||||
*/
|
||||
string name() const override { return "CartridgeCV+"; }
|
||||
|
||||
#ifdef DEBUGGER_SUPPORT
|
||||
/**
|
||||
Get debugger widget responsible for accessing the inner workings
|
||||
of the cart.
|
||||
*/
|
||||
CartDebugWidget* debugWidget(GuiObject* boss, const GUI::Font& lfont,
|
||||
const GUI::Font& nfont, int x, int y, int w, int h) override
|
||||
{
|
||||
return new CartridgeCVPlusWidget(boss, lfont, nfont, x, y, w, h, *this);
|
||||
}
|
||||
#endif
|
||||
|
||||
public:
|
||||
/**
|
||||
Get the byte at the specified address
|
||||
|
||||
@return The byte at the specified address
|
||||
*/
|
||||
uInt8 peek(uInt16 address) override;
|
||||
|
||||
/**
|
||||
Change the byte at the specified address to the given value
|
||||
|
||||
@param address The address where the value should be stored
|
||||
@param value The value to be stored at the address
|
||||
@return True if the poke changed the device address space, else false
|
||||
*/
|
||||
bool poke(uInt16 address, uInt8 value) override;
|
||||
|
||||
private:
|
||||
// Pointer to a dynamically allocated ROM image of the cartridge
|
||||
unique_ptr<uInt8[]> myImage;
|
||||
|
||||
// The 1024 bytes of RAM
|
||||
uInt8 myRAM[1024];
|
||||
|
||||
// Size of the ROM image
|
||||
uInt32 mySize;
|
||||
|
||||
// Indicates which bank is currently active for the first segment
|
||||
uInt16 myCurrentBank;
|
||||
|
||||
private:
|
||||
// Following constructors and assignment operators not supported
|
||||
CartridgeCVPlus() = delete;
|
||||
CartridgeCVPlus(const CartridgeCVPlus&) = delete;
|
||||
CartridgeCVPlus(CartridgeCVPlus&&) = delete;
|
||||
CartridgeCVPlus& operator=(const CartridgeCVPlus&) = delete;
|
||||
CartridgeCVPlus& operator=(CartridgeCVPlus&&) = delete;
|
||||
};
|
||||
|
||||
#endif
|
||||
|
|
@ -15,6 +15,7 @@ MODULE_OBJS := \
|
|||
src/emucore/CartCM.o \
|
||||
src/emucore/CartCTY.o \
|
||||
src/emucore/CartCV.o \
|
||||
src/emucore/CartCVPlus.o \
|
||||
src/emucore/CartDASH.o \
|
||||
src/emucore/CartDPC.o \
|
||||
src/emucore/CartDPCPlus.o \
|
||||
|
|
|
|||
Loading…
Reference in New Issue