105 lines
2.4 KiB
Plaintext
105 lines
2.4 KiB
Plaintext
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/*
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* This file is part of libsidplayfp, a SID player engine.
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*
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* Copyright 2012-2014 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 EXTRASIDBANK_H
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#define EXTRASIDBANK_H
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#include "Bank.h"
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#include <vector>
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#include <algorithm>
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#include "c64/c64sid.h"
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#include "sidcxx11.h"
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namespace libsidplayfp
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{
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/**
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* Extra SID bank.
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*/
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class ExtraSidBank final : public Bank
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{
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private:
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typedef std::vector<c64sid*> sids_t;
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private:
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/**
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* Size of mapping table. Each 32 bytes another SID chip base address
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* can be assigned to.
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*/
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static const int MAPPER_SIZE = 8;
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private:
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/**
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* SID mapping table.
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* Maps a SID chip base address to a SID
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* or to the underlying bank.
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*/
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Bank *mapper[MAPPER_SIZE];
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sids_t sids;
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private:
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static void resetSID(sids_t::value_type &e) { e->reset(0xf); }
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static unsigned int mapperIndex(int address) { return address >> 5 & (MAPPER_SIZE - 1); }
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public:
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virtual ~ExtraSidBank() {}
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void reset()
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{
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std::for_each(sids.begin(), sids.end(), resetSID);
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}
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void resetSIDMapper(Bank *bank)
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{
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for (int i = 0; i < MAPPER_SIZE; i++)
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mapper[i] = bank;
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}
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uint8_t peek(uint_least16_t addr) override
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{
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return mapper[mapperIndex(addr)]->peek(addr);
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}
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void poke(uint_least16_t addr, uint8_t data) override
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{
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mapper[mapperIndex(addr)]->poke(addr, data);
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}
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/**
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* Set SID emulation.
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*
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* @param s the emulation
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* @param address the address where to put the chip
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*/
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void addSID(c64sid *s, int address)
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{
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sids.push_back(s);
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mapper[mapperIndex(address)] = s;
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}
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};
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}
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#endif
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