59 lines
1.6 KiB
Plaintext
59 lines
1.6 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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* Copyright 2010 Antti Lankila
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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 DISCONNECTEDBUSBANK_H
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#define DISCONNECTEDBUSBANK_H
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#include "Bank.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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* IO1/IO2
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*
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* memory mapped registers or machine code routines of optional external devices.
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*
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* I/O Area #1 located at $DE00-$DEFF
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*
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* I/O Area #2 located at $DF00-$DFFF
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*/
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class DisconnectedBusBank final : public Bank
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{
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/**
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* No device is connected so this is a no-op.
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*/
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void poke(uint_least16_t, uint8_t) override {}
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/**
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* This should actually return last byte read from VIC
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* but since the VIC emulation currently does not fetch
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* any value from memory we return zero.
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*/
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uint8_t peek(uint_least16_t) override { return 0; }
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};
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}
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#endif
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