137 lines
4.6 KiB
C++
137 lines
4.6 KiB
C++
//
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// Copyright (c) 2004 K. Wilkins
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//
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// This software is provided 'as-is', without any express or implied warranty.
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// In no event will the authors be held liable for any damages arising from
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// the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would be
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// appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source distribution.
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//
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//////////////////////////////////////////////////////////////////////////////
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// Handy - An Atari Lynx Emulator //
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// Copyright (c) 1996,1997 //
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// K. Wilkins //
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//////////////////////////////////////////////////////////////////////////////
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// Lynx cartridge class header file //
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//////////////////////////////////////////////////////////////////////////////
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// //
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// This header file provides the interface definition and code for some of //
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// the simpler cartridge API. //
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// //
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// K. Wilkins //
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// August 1997 //
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// //
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//////////////////////////////////////////////////////////////////////////////
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// Revision History: //
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// ----------------- //
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// //
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// 01Aug1997 KW Document header added & class documented. //
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// //
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//////////////////////////////////////////////////////////////////////////////
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#ifndef CART_H
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#define CART_H
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#define DEFAULT_CART_CONTENTS 0x11
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enum CTYPE {UNUSED,C64K,C128K,C256K,C512K,C1024K};
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/*
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#define CART_NO_ROTATE 0
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#define CART_ROTATE_LEFT 1
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#define CART_ROTATE_RIGHT 2
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struct LYNX_HEADER
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{
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uint8 magic[4]; // "LYNX"
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uint16 page_size_bank0;
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uint16 page_size_bank1; // "BS93" for unsupported homebrews
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uint16 version;
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uint8 cartname[32];
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uint8 manufname[16];
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uint8 rotation;
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uint8 spare[5];
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};
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*/
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class CCart : public CLynxBase
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{
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// Function members
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public:
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CCart(const uint8 *gamedata, uint32 gamesize, int pagesize0, int pagesize1) MDFN_COLD;
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~CCart() MDFN_COLD;
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public:
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// Access for sensible members of the clan
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enum { HEADER_RAW_SIZE = 64 };
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//static bool TestMagic(const uint8 *data, uint32 size);
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void Reset(void) MDFN_COLD;
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void Poke(uint32 addr,uint8 data);
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uint8 Peek(uint32 addr);
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uint32 ReadCycle(void) {return 15;};
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uint32 WriteCycle(void) {return 15;};
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void BankSelect(EMMODE newbank) {mBank=newbank;}
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uint32 ObjectSize(void) {return (mBank==bank0)?mMaskBank0+1:mMaskBank1+1;};
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// Access for the lynx itself, it has no idea of address etc as this is done by the
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// cartridge emulation hardware
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void CartAddressStrobe(bool strobe);
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void CartAddressData(bool data);
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void Poke0(uint8 data);
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void Poke1(uint8 data);
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uint8 Peek0(void);
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uint8 Peek1(void);
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// Data members
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public:
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bool mWriteEnableBank0; // always false, as all carts have rom here
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bool mWriteEnableBank1;
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bool mCartRAM; // always true if there is no second rom segment; probably providing saveram in many cases
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// when the original cart did not have it
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bool GetSaveRamPtr(int &size, uint8 *&data);
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void GetReadOnlyPtrs(int &s0, uint8 *&p0, int &s1, uint8 *&p1);
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template<bool isReader>void SyncState(NewState *ns);
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private:
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EMMODE mBank;
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uint32 mMaskBank0;
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uint32 mMaskBank1;
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uint8 *mCartBank0;
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uint8 *mCartBank1;
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uint32 mCounter;
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uint32 mShifter;
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uint32 mAddrData;
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uint32 mStrobe;
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uint32 mShiftCount0;
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uint32 mCountMask0;
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uint32 mShiftCount1;
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uint32 mCountMask1;
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int8 last_strobe;
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};
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#endif
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