mirror of https://github.com/stella-emu/stella.git
67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
//============================================================================
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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) 1995-2019 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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#include "System.hxx"
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#include "Cart4K.hxx"
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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Cartridge4K::Cartridge4K(const ByteBuffer& image, size_t size,
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const string& md5, const Settings& settings)
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: Cartridge(settings, md5)
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{
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// Copy the ROM image into my buffer
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std::copy_n(image.get(), std::min(myImage.size(), size), myImage.begin());
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createCodeAccessBase(myImage.size());
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void Cartridge4K::reset()
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{
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myBankChanged = true;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void Cartridge4K::install(System& system)
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{
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mySystem = &system;
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// Map ROM image into the system
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// Note that we don't need our own peek/poke methods, since the mapping
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// takes care of the entire address space
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System::PageAccess access(this, System::PageAccessType::READ);
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for(uInt16 addr = 0x1000; addr < 0x2000; addr += System::PAGE_SIZE)
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{
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access.directPeekBase = &myImage[addr & 0x0FFF];
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access.codeAccessBase = &myCodeAccessBase[addr & 0x0FFF];
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mySystem->setPageAccess(addr, access);
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}
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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bool Cartridge4K::patch(uInt16 address, uInt8 value)
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{
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myImage[address & 0x0FFF] = value;
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return myBankChanged = true;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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const uInt8* Cartridge4K::getImage(size_t& size) const
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{
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size = myImage.size();
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return myImage.data();
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}
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