mirror of https://github.com/pyrollo/vinace.git
54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* Vinace
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* Copyright (C) P.Y. Rollo 2009 <dev@pyrollo.com>
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*
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* Vinace is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Vinace is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the 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 along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "c-io-rom-bus.hpp"
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CIoRomBus::CIoRomBus(CIoRomUnit *ioRomUnit, CMemory *slotRom, CMemory *internalRom) {
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this->ioRomUnit = ioRomUnit;
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this->slotRom = slotRom;
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this->internalRom = internalRom;
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notify((CObservable *)ioRomUnit);
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ioRomUnit->subscribe((CObserver *)this);
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}
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CIoRomBus::~CIoRomBus() {
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ioRomUnit->unsubscribe((CObserver *)this);
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}
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BYTE CIoRomBus::read(WORD addr) {
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if ((addr&0xff00) == 0x0300)
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return selectedC3Rom->read(addr);
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else
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return selectedRom->read(addr);
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}
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void CIoRomBus::notify(CObservable * obs) {
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if (ioRomUnit->get_cxrom()) {
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selectedRom = internalRom;
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selectedC3Rom = internalRom;
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} else {
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selectedRom = slotRom;
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if (ioRomUnit->get_c3rom()) {
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selectedC3Rom = slotRom;
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} else {
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selectedC3Rom = internalRom;
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}
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}
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}
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