1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/***************************************************************************
c64sid.h - ReSid Wrapper
-------------------
begin : Fri Apr 4 2001
copyright : (C) 2001 by Simon White
email : s_a_white@email.com
***************************************************************************/
/***************************************************************************
* *
* 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 file could be a specialisation of a sid implementation.
* However since the sid emulation is not part of this project
* we are actually creating a wrapper instead.
*/
#include "c64env.h"
#include "sidbuilder.h"
#include "../xsid/xsid.h"
class c64xsid: public XSID
{
private:
c64env &m_env;
sidemu *m_sid;
int_least32_t m_gain;
private:
uint8_t readMemByte (uint_least16_t addr)
{return m_env.readMemRamByte (addr);}
void writeMemByte (uint8_t data)
{m_sid->write (0x18, data);}
public:
c64xsid (c64env *env, sidemu *sid)
:XSID(&env->context ()),
m_env(*env), m_sid(sid), m_gain(100)
{;}
// Standard component interface
const char *error (void) {return "";}
void reset () { sidemu::reset (); }
void reset (uint8_t volume)
{
XSID::reset (volume);
m_sid->reset (volume);
}
uint8_t read (uint_least8_t addr)
{ return m_sid->read (addr); }
void write (uint_least8_t addr, uint8_t data)
{
if (addr == 0x18)
XSID::storeSidData0x18 (data);
else
m_sid->write (addr, data);
}
void write16 (uint_least16_t addr, uint8_t data)
{
XSID::write (addr, data);
}
// Standard SID interface
int_least32_t output (uint_least8_t bits)
{ return m_sid->output (bits) + (XSID::output (bits) * m_gain / 100); }
void voice (uint_least8_t num, uint_least8_t vol,
bool mute)
{
if (num == 3)
XSID::mute (mute);
else
m_sid->voice (num, vol, mute);
}
void gain (int_least8_t percent)
{
// 0 to 99 is loss, 101 - 200 is gain
m_gain = percent;
m_gain += 100;
if (m_gain > 200)
m_gain = 200;
}
// Xsid specific
void emulation (sidemu *sid) {m_sid = sid;}
sidemu *emulation (void) { return m_sid; }
};
|
