mirror of https://github.com/makarcz/vm6502.git
114 lines
3.4 KiB
C++
114 lines
3.4 KiB
C++
/*
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*--------------------------------------------------------------------
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* Project: VM65 - Virtual Machine/CPU emulator programming
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* framework.
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*
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* File: Memory.h
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*
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* Purpose: Prototype of Memory class and supporting data
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* structures, constants, enumerations and macros.
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*
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* Date: 8/25/2016
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*
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* Copyright: (C) by Marek Karcz 2016. All rights reserved.
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*
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* Contact: makarcz@yahoo.com
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*
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* License Agreement and Warranty:
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This software is provided with No Warranty.
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I (Marek Karcz) will not be held responsible for any damage to
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computer systems, data or user's health resulting from use.
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Please proceed responsibly and exercise common sense.
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This software is provided in hope that it will be useful.
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It is free of charge for non-commercial and educational use.
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Distribution of this software in non-commercial and educational
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derivative work is permitted under condition that original
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copyright notices and comments are preserved. Some 3-rd party work
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included with this project may require separate application for
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permission from their respective authors/copyright owners.
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*--------------------------------------------------------------------
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*/
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#ifndef MEMORY_H
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#define MEMORY_H
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#include "system.h"
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#include "MemMapDev.h"
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#define MAX_8BIT_ADDR 0xFFFF
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#define MEM_PAGE_SIZE 0x100
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#define ROM_BEGIN 0xD000
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#define ROM_END 0xDFFF
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#define MIN_ROM_BEGIN 0x0200
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using namespace std;
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namespace MKBasic {
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class Memory
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{
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public:
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Memory();
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~Memory();
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void Initialize();
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unsigned char Peek8bit(unsigned short addr);
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unsigned char Peek8bitImg(unsigned short addr);
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unsigned short Peek16bit(unsigned short addr);
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void Poke8bit(unsigned short addr, unsigned char val); // write to memory and call memory mapped device handle
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void Poke8bitImg(unsigned short addr, unsigned char val); // write to memory image only
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void SetCharIO(unsigned short addr, bool echo);
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void DisableCharIO();
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unsigned short GetCharIOAddr();
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char GetCharIn();
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char GetCharOut();
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void EnableROM();
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void DisableROM();
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void SetROM(unsigned short start, unsigned short end);
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void EnableROM(unsigned short start, unsigned short end);
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unsigned short GetROMBegin();
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unsigned short GetROMEnd();
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bool IsROMEnabled();
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int AddDevice(int devnum);
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int DeleteDevice(int devnum);
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void SetupDevice(int devnum, MemAddrRanges memranges, DevParams params);
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void SetGraphDisp(unsigned short addr);
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void DisableGraphDisp();
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unsigned short GetGraphDispAddr();
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void GraphDisp_ReadEvents();
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void GraphDisp_Update();
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bool GraphDispOp();
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MemMapDev *GetMemMapDevPtr();
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protected:
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private:
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unsigned char m8bitMem[MAX_8BIT_ADDR+1];
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// array of device usage for each memory page
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// this is performance optimization array that keeps values >= 0 under the
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// indexes of memory pages where the memory mapped device is active or -1
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// if there is no active device on given memory page
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int mMemPageDev[MEM_PAGE_SIZE];
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unsigned short mCharIOAddr;
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bool mCharIOActive;
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bool mIOEcho;
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unsigned short mROMBegin;
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unsigned short mROMEnd;
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bool mROMActive;
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vector<Device> mActiveDeviceVec; // active devices
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MemMapDev *mpMemMapDev; // pointer to MemMapDev object
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bool mGraphDispActive;
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bool mDispOp;
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unsigned char ReadCharKb(bool nonblock);
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void PutCharIO(char c);
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};
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} // namespace MKBasic
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#endif
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