libsidplayfp  1.8.7
SystemRAMBank.h
1 /*
2  * This file is part of libsidplayfp, a SID player engine.
3  *
4  * Copyright 2012-2013 Leandro Nini <drfiemost@users.sourceforge.net>
5  * Copyright 2010 Antti Lankila
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20  */
21 
22 #ifndef SYSTEMRAMBANK_H
23 #define SYSTEMRAMBANK_H
24 
25 #include <stdint.h>
26 #include <cstring>
27 
28 #include "Bank.h"
29 
35 class SystemRAMBank : public Bank
36 {
37  friend class MMU;
38 
39 private:
41  uint8_t ram[0x10000];
42 
43 public:
47  void reset()
48  {
49  memset(ram, 0, 0x10000);
50  for (int i = 0x07c0; i < 0x10000; i += 128)
51  {
52  memset(ram+i, 0xff, 64);
53  }
54  }
55 
56  uint8_t peek(uint_least16_t address)
57  {
58  return ram[address];
59  }
60 
61  void poke(uint_least16_t address, uint8_t value)
62  {
63  ram[address] = value;
64  }
65 };
66 
67 #endif
uint8_t peek(uint_least16_t address)
Definition: SystemRAMBank.h:56
Definition: Bank.h:32
Definition: SystemRAMBank.h:35
Definition: mmu.h:43
void reset()
Definition: SystemRAMBank.h:47
void poke(uint_least16_t address, uint8_t value)
Definition: SystemRAMBank.h:61