summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/fairlight/cmi01a.h
blob: 0531b3106d88d2bcc005c72e671fb2d13d96ef7a (plain) (blame)
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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
// license:BSD-3-Clause
// copyright-holders:Phil Bennett
/***************************************************************************

    Fairlight CMI-01A Channel Controller Card

***************************************************************************/

#ifndef MAME_FAIRLIGHT_CMI01A_H
#define MAME_FAIRLIGHT_CMI01A_H

#include "machine/6821pia.h"
#include "machine/6840ptm.h"
#include "machine/input_merger.h"

class cmi01a_device : public device_t, public device_sound_interface {
public:
	cmi01a_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock, u32 channel)
		: cmi01a_device(mconfig, tag, owner, clock)
	{
		m_channel = channel;
	}

	cmi01a_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);

	auto irq_callback() { return m_irq_cb.bind(); }

	void write(offs_t offset, u8 data);
	u8 read(offs_t offset);

	virtual void sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs) override;

	void set_master_osc(double mosc) { m_mosc = mosc; }

protected:
	virtual void device_start() override ATTR_COLD;
	virtual void device_reset() override ATTR_COLD;
	virtual void device_add_mconfig(machine_config &config) override ATTR_COLD;

	required_device<input_merger_device> m_irq_merger;
	required_device_array<pia6821_device, 2> m_pia;
	required_device<ptm6840_device> m_ptm;

	sound_stream* m_stream;

private:
	enum : int
	{
		ENV_DIR_UP,
		ENV_DIR_DOWN
	};

	void cmi01a_irq(int state);

	TIMER_CALLBACK_MEMBER(update_sample);

	void notload_w(int state);
	int notload_r();

	void run_voice();

	void rp_w(u8 data);
	u8 rp_r();
	void ws_dir_w(u8 data);
	u8 ws_dir_r();
	int tri_r();
	void run_w(int state);
	void permit_eload_w(int state);

	int eosi_r();
	int zx_r();
	u8 pitch_octave_r();
	void pitch_octave_w(u8 data);
	u8 pitch_lsb_r();
	void pitch_lsb_w(u8 data);

	void ptm_o1(int state);
	void ptm_o2(int state);
	void ptm_o3(int state);

	// New functions below this line
	void update_rstb_pulser();
	void set_run_load_xor(const bool run_load_xor);
	TIMER_CALLBACK_MEMBER(rstb_pulse_cb);
	void set_not_rstb(const bool not_rstb);

	void update_bcas_q1_enable();
	TIMER_CALLBACK_MEMBER(bcas_q1_tick);

	void set_zx_flipflop_clock(const bool zx_ff_clk);
	void set_zx_flipflop_state(const bool zx_ff);

	void pulse_zcint();
	TIMER_CALLBACK_MEMBER(zcint_pulse_cb);
	void set_not_zcint(const bool not_zcint);

	void set_not_load(const bool not_load);

	void update_gzx();
	void set_gzx(const bool gzx);

	void update_not_eload();
	void set_not_eload(const bool not_eload);
	void try_load_envelope();
	void set_envelope(const u8 env);
	void update_envelope_divider();
	void set_envelope_dir(const int env_dir);
	void update_envelope_clock();
	void clock_envelope();
	void tick_ediv();

	void update_envelope_tri();
	void not_wpe_w(int state);
	void update_upper_wave_addr_load();
	void set_upper_wave_addr_load(const bool upper_wave_addr_load);
	void try_load_upper_wave_addr();
	void set_wave_addr_lsb(const u8 wave_addr_lsb);
	void set_wave_addr_msb(const u8 wave_addr_msb);
	void set_wave_addr_msb_clock(const bool wave_addr_msb_clock);
	void update_filters();

	void set_zx(const bool zx);
	void update_ptm_c1();

	u32         m_channel;

	emu_timer * m_zcint_pulse_timer = nullptr;
	emu_timer * m_rstb_pulse_timer = nullptr;
	emu_timer * m_bcas_q1_timer = nullptr;
	emu_timer * m_sample_timer = nullptr;

	devcb_write_line m_irq_cb;

	std::unique_ptr<u8[]>    m_wave_ram;
	u8          m_current_sample = 0;

	double      m_mosc = 0.0;
	u16         m_pitch = 0;
	u8          m_octave = 0;

	bool        m_zx_ff_clk = false;
	bool        m_zx_ff = false;
	bool        m_zx = false;
	bool        m_gzx = false;

	bool        m_run = false;
	bool        m_not_rstb = true;
	bool        m_not_load = false;
	bool        m_not_zcint = true;
	bool        m_not_wpe = true;
	bool        m_new_addr = false;

	bool        m_tri = false;
	bool        m_permit_eload = false;
	bool        m_not_eload = true;

	bool        m_bcas_q1_enabled = true;
	bool        m_bcas_q1 = false;
	bool        m_bcas_q2 = false;

	int         m_env_dir = 0;
	u8          m_env = 0;
	u8          m_env_divider = 0;
	bool        m_ediv_out = false;
	bool        m_envdiv_toggles[6];
	bool        m_eclk = false;
	bool        m_env_clk = false;

	u8          m_wave_addr_lsb = 0;
	u8          m_wave_addr_msb = 0;
	bool        m_upper_wave_addr_load = false;
	bool        m_wave_addr_msb_clock = true;
	bool        m_run_load_xor = true;
	bool        m_delayed_inverted_run_load = false;

	bool        m_ptm_c1 = false;
	bool        m_ptm_o1 = false;
	bool        m_ptm_o2 = false;
	bool        m_ptm_o3 = false;

	u8          m_vol_latch = 0;
	u8          m_flt_latch = 0;
	u8          m_rp = 0;
	u8          m_ws = 0;
	int         m_dir = 0;

	double      m_ha0 = 0;
	double      m_ha1 = 0;
	double      m_hb0 = 0;
	double      m_hb1 = 0;
	double      m_hc0 = 0;
	double      m_hc1 = 0;

	double      m_ka0 = 0;
	double      m_ka1 = 0;
	double      m_ka2 = 0;
	double      m_kb0 = 0;
	double      m_kb1 = 0;
	double      m_kb2 = 0;
};

// device type definition
DECLARE_DEVICE_TYPE(CMI01A_CHANNEL_CARD, cmi01a_device)

#endif // MAME_FAIRLIGHT_CMI01A_H