mirror of https://github.com/stella-emu/stella.git
72 lines
2.0 KiB
C++
72 lines
2.0 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) 1995-2020 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 "CartE0.hxx"
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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CartridgeE0::CartridgeE0(const ByteBuffer& image, size_t size,
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const string& md5, const Settings& settings,
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size_t bsSize)
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: CartridgeEnhanced(image, size, md5, settings, bsSize)
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{
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myBankShift = BANK_SHIFT;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void CartridgeE0::reset()
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{
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// Setup segments to some default banks
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if(randomStartBank())
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{
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bank(mySystem->randGenerator().next() % 8, 0);
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bank(mySystem->randGenerator().next() % 8, 1);
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bank(mySystem->randGenerator().next() % 8, 2);
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}
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else
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{
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bank(4, 0);
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bank(5, 1);
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bank(6, 2);
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}
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myBankChanged = true;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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bool CartridgeE0::checkSwitchBank(uInt16 address, uInt8)
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{
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address &= ROM_MASK;
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// Switch banks if necessary
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if((address >= 0x0FE0) && (address <= 0x0FE7))
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{
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bank(address & 0x0007, 0);
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return true;
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}
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else if((address >= 0x0FE8) && (address <= 0x0FEF))
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{
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bank(address & 0x0007, 1);
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return true;
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}
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else if((address >= 0x0FF0) && (address <= 0x0FF7))
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{
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bank(address & 0x0007, 2);
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return true;
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}
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return false;
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}
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