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alexbevi
GitHub Repository: alexbevi/BizHawk
 Path: blob/master/lynx/rom.h
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//

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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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// ROM object header file                                                   //

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//////////////////////////////////////////////////////////////////////////////

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//                                                                          //

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// This header file provides the interface definition and inline code for   //

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// the class the emulates the internal 512 byte ROM embedded in Mikey       //

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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 ROM_H

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#define ROM_H

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#define ROM_SIZE				0x200

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#define ROM_ADDR_MASK			0x01ff

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#define DEFAULT_ROM_CONTENTS	0x88

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#define BROM_START		0xfe00

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#define BROM_SIZE		0x200

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#define VECTOR_START	0xfffa

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#define VECTOR_SIZE		0x6

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class CRom : public CLynxBase

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{

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public:

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	CRom(const uint8 *, uint32) MDFN_COLD;

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public:

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	void	Reset(void) MDFN_COLD;

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	void	Poke(uint32 addr,uint8 data) { /*if(mWriteEnable) mRomData[addr&ROM_ADDR_MASK]=data;*/ }

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	uint8	Peek(uint32 addr) { return(mRomData[addr&ROM_ADDR_MASK]); }

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	uint32	ReadCycle(void) {return 5;}

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	uint32	WriteCycle(void) {return 5;}

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	uint32	ObjectSize(void) {return ROM_SIZE;}

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	template<bool isReader>void SyncState(NewState *ns);

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	// Data members

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public:

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	//bool	mWriteEnable; // always false

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private:

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	uint8	mRomData[ROM_SIZE];

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};

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#endif

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