54 lines
1.4 KiB
C++
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
|