SIDPlayer/src/mem.cpp

/*
 *  mem.cpp - Emulator memory management
 *
 *  SIDPlayer (C) Copyright 1996-2003 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
 */

#include "sys.h"

#include <string.h>

#ifndef __psx__
#include <errno.h>
#endif

#include "mem.h"


// Memory area
uint8 ram[RAM_SIZE];


/*
 *  Init memory management
 */

void MemoryInit()
{
        // Clear memory contents
        MemoryClear();
}


/*
 *  Exit memory management
 */

void MemoryExit()
{
}


/*
 *  Clear memory contents
 */

void MemoryClear()
{
        memset(ram, 0, RAM_SIZE - 0x2000);
        memset(ram + 0xe000, 0x40, 0x2000);             // Fill kernal ROM area with RTI
        ram[1] = 7;                                                             // 6510 I/O port
        ram[0x0314] = 0x31;                                             // IRQ vector
        ram[0x0315] = 0xea;
}
Revision:	1.4
Committed:	2003-10-21T16:56:19Z (21 years, 1 month ago) by cebix
Branch:	MAIN
Changes since 1.3:	+3 -3 lines
Log Message:	- play_adr is updated from the IRQ vector every time before the replay routine is called if it was 0 in the PSID header (this makes some tunes play correctly now) - f(void) -> f() (this is C++, dammit!)
#	User	Rev	Content
1	cebix	1.1	/*
2			* mem.cpp - Emulator memory management
3			*
4	cebix	1.3	* SIDPlayer (C) Copyright 1996-2003 Christian Bauer
5	cebix	1.1	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20
21			#include "sys.h"
22
23			#include <string.h>
24
25			#ifndef __psx__
26			#include <errno.h>
27			#endif
28
29			#include "mem.h"
30
31
32			// Memory area
33			uint8 ram[RAM_SIZE];
34
35
36			/*
37			* Init memory management
38			*/
39
40	cebix	1.4	void MemoryInit()
41	cebix	1.1	{
42			// Clear memory contents
43			MemoryClear();
44			}
45
46
47			/*
48			* Exit memory management
49			*/
50
51	cebix	1.4	void MemoryExit()
52	cebix	1.1	{
53			}
54
55
56			/*
57			* Clear memory contents
58			*/
59
60	cebix	1.4	void MemoryClear()
61	cebix	1.1	{
62			memset(ram, 0, RAM_SIZE - 0x2000);
63			memset(ram + 0xe000, 0x40, 0x2000); // Fill kernal ROM area with RTI
64			ram[1] = 7; // 6510 I/O port
65			ram[0x0314] = 0x31; // IRQ vector
66			ram[0x0315] = 0xea;
67			}