107 lines
2.9 KiB
Plaintext
107 lines
2.9 KiB
Plaintext
/*
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* This file is part of libsidplayfp, a SID player engine.
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*
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* Copyright 2012-2013 Leandro Nini <drfiemost@users.sourceforge.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef SIDMEMORY_H
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#define SIDMEMORY_H
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#include <stdint.h>
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/**
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* An interface that allows access to c64 memory
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* for loading tunes and apply sid specific hacks.
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*/
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class sidmemory
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{
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public:
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/**
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* Read one byte from memory.
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*
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* @param addr the memory location from which to read from
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*/
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virtual uint8_t readMemByte(uint_least16_t addr) =0;
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/**
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* Read two contiguous bytes from memory.
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*
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* @param addr the memory location from which to read from
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*/
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virtual uint_least16_t readMemWord(uint_least16_t addr) =0;
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/**
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* Write one byte to memory.
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*
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* @param addr the memory location where to write
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* @param value the value to write
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*/
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virtual void writeMemByte(uint_least16_t addr, uint8_t value) =0;
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/**
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* Write two contiguous bytes to memory.
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*
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* @param addr the memory location where to write
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* @param value the value to write
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*/
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virtual void writeMemWord(uint_least16_t addr, uint_least16_t value) =0;
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/**
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* Fill ram area with a constant value.
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*
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* @param start the start of memory location where to write
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* @param value the value to write
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* @param size the number of bytes to fill
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*/
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virtual void fillRam(uint_least16_t start, uint8_t value, unsigned int size) =0;
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/**
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* Copy a buffer into a ram area.
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*
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* @param start the start of memory location where to write
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* @param source the source buffer
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* @param size the number of bytes to copy
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*/
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virtual void fillRam(uint_least16_t start, const uint8_t* source, unsigned int size) =0;
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/**
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* Change the RESET vector.
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*
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* @param addr the new addres to point to
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*/
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virtual void installResetHook(uint_least16_t addr) =0;
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/**
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* Set BASIC Warm Start address.
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*
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* @param addr the new addres to point to
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*/
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virtual void installBasicTrap(uint_least16_t addr) =0;
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/**
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* Set the start tune.
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*
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* @param tune the tune number
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*/
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virtual void setBasicSubtune(uint8_t tune) =0;
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protected:
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~sidmemory() {}
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};
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#endif
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