mirror of https://github.com/pyrollo/vinace.git
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
|
|
/*
|
|
* Vinace
|
|
* Copyright (C) P.Y. Rollo 2009 <dev@pyrollo.com>
|
|
*
|
|
* Vinace is free software: you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Vinace is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
* See the GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef _C_LANGUAGE_CARD_UNIT_HPP_
|
|
#define _C_LANGUAGE_CARD_UNIT_HPP_
|
|
|
|
#include "c-unit.hpp"
|
|
|
|
//
|
|
// Language Card Unit
|
|
//
|
|
// This unit takes care of $D000-$FFFF memory management switches
|
|
//
|
|
// See "Apple IIe Technical Reference Manual" pages 79 to 83 (PDF pp113-117)
|
|
|
|
class CLanguageCardUnit: public CUnit {
|
|
public:
|
|
void reset();
|
|
BYTE read(BYTE addr);
|
|
void write(BYTE addr, BYTE byte);
|
|
|
|
// Language Card ($D000-DFFF and $E000-FFFF spaces)
|
|
FLAG_RO(lcbnk2); // Using $D000-$DFFF RAM bank 1 (0) or bank 2 (1)
|
|
FLAG_RO(lcram); // Reading ROM(0) or RAM (1)
|
|
FLAG_RO(lcwrite); // Allow writing into RAM (1) or not (0)
|
|
FLAG_RO(lcwchg); // lcwrite changeable (1) or not (0) (to switch write, it is needed to switch twice)
|
|
|
|
private:
|
|
void access(BYTE addr);
|
|
};
|
|
|
|
#endif // _C_LANGUAGE_CARD_UNIT_HPP_
|