frodo-wii/Src/REU.h
2009-01-13 18:46:42 +00:00

54 lines
1.4 KiB
C++

/*
* REU.h - 17xx REU emulation
*
* Frodo (C) 1994-1997,2002-2005 Christian Bauer
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _REU_H
#define _REU_H
class MOS6510;
class Prefs;
class REU {
public:
REU(MOS6510 *CPU);
~REU();
void NewPrefs(Prefs *prefs);
void Reset(void);
uint8 ReadRegister(uint16 adr);
void WriteRegister(uint16 adr, uint8 byte);
void FF00Trigger(void);
private:
void open_close_reu(int old_size, int new_size);
void execute_dma(void);
MOS6510 *the_cpu; // Pointer to 6510
uint8 *ex_ram; // REU expansion RAM
uint32 ram_size; // Size of expansion RAM
uint32 ram_mask; // Expansion RAM address bit mask
uint8 regs[16]; // REU registers
};
#endif