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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
// license:BSD-3-Clause
// copyright-holders:R. Belmont
/*********************************************************************
a2dx1.c
Implementation of the Decillionix DX-1 sampler card
*********************************************************************/
#include "a2dx1.h"
#include "includes/apple2.h"
#include "sound/dac.h"
/***************************************************************************
PARAMETERS
***************************************************************************/
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
const device_type A2BUS_DX1 = &device_creator<a2bus_dx1_device>;
#define DAC_TAG "dac"
MACHINE_CONFIG_FRAGMENT( a2dx1 )
MCFG_SPEAKER_STANDARD_MONO("dx1spkr")
MCFG_SOUND_ADD(DAC_TAG, DAC, 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "dx1spkr", 1.00)
MACHINE_CONFIG_END
/***************************************************************************
FUNCTION PROTOTYPES
***************************************************************************/
//-------------------------------------------------
// machine_config_additions - device-specific
// machine configurations
//-------------------------------------------------
machine_config_constructor a2bus_dx1_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( a2dx1 );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
a2bus_dx1_device::a2bus_dx1_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) :
device_t(mconfig, type, name, tag, owner, clock, shortname, source),
device_a2bus_card_interface(mconfig, *this),
m_dac(*this, DAC_TAG), m_volume(0), m_lastdac(0)
{
}
a2bus_dx1_device::a2bus_dx1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, A2BUS_DX1, "Decillonix DX-1", tag, owner, clock, "a2dx1", __FILE__),
device_a2bus_card_interface(mconfig, *this),
m_dac(*this, DAC_TAG), m_volume(0), m_lastdac(0)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void a2bus_dx1_device::device_start()
{
// set_a2bus_device makes m_slot valid
set_a2bus_device();
save_item(NAME(m_volume));
save_item(NAME(m_lastdac));
}
void a2bus_dx1_device::device_reset()
{
m_volume = m_lastdac = 0;
}
UINT8 a2bus_dx1_device::read_c0nx(address_space &space, UINT8 offset)
{
switch (offset)
{
case 1: // ADC input
return 0;
case 3: // busy flag
return 0x80; // indicate not busy
case 7: // 1-bit ADC input (bit 7 of c0n1, probably)
return 0;
}
return 0xff;
}
void a2bus_dx1_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data)
{
switch (offset)
{
case 5: // volume
m_volume = data;
m_dac->write_unsigned16(data*m_lastdac);
break;
case 6:
m_lastdac = data;
m_dac->write_unsigned16(data*m_volume);
break;
}
}
bool a2bus_dx1_device::take_c800()
{
return false;
}
|