summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/machine/pc9801_86.c
blob: 10380c146fbe53d7b76070a92db874dcc0798121 (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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
// license:MAME
// copyright-holders:Angelo Salese
/***************************************************************************

    NEC PC-9801-86 sound card

    Almost the same thing as PC-9801-86, but this one has YM2608 instead of
    YM2203

    TODO:
    - joystick code should be shared between -26, -86 and -118

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

#include "emu.h"
#include "machine/pc9801_86.h"
#include "machine/pic8259.h"
#include "sound/2608intf.h"

#define MAIN_CLOCK_X1 XTAL_1_9968MHz

//**************************************************************************
//  GLOBAL VARIABLES
//**************************************************************************

// device type definition
const device_type PC9801_86 = &device_creator<pc9801_86_device>;


READ8_MEMBER(pc9801_86_device::opn_porta_r)
{
	if(m_joy_sel & 0x80)
		return ioport(m_joy_sel & 0x40 ? "OPNA_PA2" : "OPNA_PA1")->read();

	return 0xff;
}

WRITE8_MEMBER(pc9801_86_device::opn_portb_w){ m_joy_sel = data; }

WRITE_LINE_MEMBER(pc9801_86_device::pc9801_sound_irq)
{
	/* TODO: seems to die very often */
	machine().device<pic8259_device>(":pic8259_slave")->ir4_w(state);
}

static MACHINE_CONFIG_FRAGMENT( pc9801_86_config )
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("opna", YM2608, MAIN_CLOCK_X1*4) // unknown clock / divider
	MCFG_YM2608_IRQ_HANDLER(WRITELINE(pc9801_86_device, pc9801_sound_irq))
	MCFG_AY8910_PORT_A_READ_CB(READ8(pc9801_86_device, opn_porta_r))
	//MCFG_AY8910_PORT_B_READ_CB(READ8(pc9801_state, opn_portb_r))
	//MCFG_AY8910_PORT_A_WRITE_CB(WRITE8(pc9801_state, opn_porta_w))
	MCFG_AY8910_PORT_B_WRITE_CB(WRITE8(pc9801_86_device, opn_portb_w))
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
MACHINE_CONFIG_END

//-------------------------------------------------
//  machine_config_additions - device-specific
//  machine configurations
//-------------------------------------------------

machine_config_constructor pc9801_86_device::device_mconfig_additions() const
{
	return MACHINE_CONFIG_NAME( pc9801_86_config );
}

// RAM
ROM_START( pc9801_86 )
	ROM_REGION( 0x100000, "opna", ROMREGION_ERASE00 )
ROM_END

const rom_entry *pc9801_86_device::device_rom_region() const
{
	return ROM_NAME( pc9801_86 );
}


//-------------------------------------------------
//  input_ports - device-specific input ports
//-------------------------------------------------

static INPUT_PORTS_START( pc9801_86 )
	PORT_START("OPNA_PA1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1) PORT_NAME("P1 Joystick Up")
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1) PORT_NAME("P1 Joystick Down")
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1) PORT_NAME("P1 Joystick Left")
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1) PORT_NAME("P1 Joystick Right")
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1) PORT_NAME("P1 Joystick Button 1")
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1) PORT_NAME("P1 Joystick Button 2")
	PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("OPNA_PA2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(2) PORT_NAME("P2 Joystick Up")
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(2) PORT_NAME("P2 Joystick Down")
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2) PORT_NAME("P2 Joystick Left")
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2) PORT_NAME("P2 Joystick Right")
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2) PORT_NAME("P2 Joystick Button 1")
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2) PORT_NAME("P2 Joystick Button 2")
	PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("OPNA_DSW")
	PORT_CONFNAME( 0x01, 0x00, "PC-9801-86: Port Base" )
	PORT_CONFSETTING(    0x00, "0x088" )
	PORT_CONFSETTING(    0x01, "0x188" )
INPUT_PORTS_END

ioport_constructor pc9801_86_device::device_input_ports() const
{
	return INPUT_PORTS_NAME( pc9801_86 );
}

//**************************************************************************
//  LIVE DEVICE
//**************************************************************************

//-------------------------------------------------
//  pc9801_86_device - constructor
//-------------------------------------------------

pc9801_86_device::pc9801_86_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
	: device_t(mconfig, PC9801_86, "pc9801_86", tag, owner, clock, "pc9801_86", __FILE__),
//      m_maincpu(*owner, "maincpu"),
		m_opna(*this, "opna")
{
}


//-------------------------------------------------
//  device_validity_check - perform validity checks
//  on this device
//-------------------------------------------------

void pc9801_86_device::device_validity_check(validity_checker &valid) const
{
}

//-------------------------------------------------
//  device_start - device-specific startup
//-------------------------------------------------

void pc9801_86_device::install_device(offs_t start, offs_t end, offs_t mask, offs_t mirror, read8_delegate rhandler, write8_delegate whandler)
{
	int buswidth = machine().firstcpu->space_config(AS_IO)->m_databus_width;
	switch(buswidth)
	{
		case 8:
			machine().firstcpu->space(AS_IO).install_readwrite_handler(start, end, mask, mirror, rhandler, whandler, 0);
			break;
		case 16:
			machine().firstcpu->space(AS_IO).install_readwrite_handler(start, end, mask, mirror, rhandler, whandler, 0xffff);
			break;
		case 32:
			machine().firstcpu->space(AS_IO).install_readwrite_handler(start, end, mask, mirror, rhandler, whandler, 0xffffffff);
			break;
		default:
			fatalerror("PC-9801-86: Bus width %d not supported\n", buswidth);
			break;
	}
}


void pc9801_86_device::device_start()
{
}


//-------------------------------------------------
//  device_reset - device-specific reset
//-------------------------------------------------

void pc9801_86_device::device_reset()
{
	UINT16 port_base = (ioport("OPNA_DSW")->read() & 1) << 8;
	install_device(port_base + 0x0088, port_base + 0x008f, 0, 0, read8_delegate(FUNC(pc9801_86_device::pc9801_86_r), this), write8_delegate(FUNC(pc9801_86_device::pc9801_86_w), this) );
//  install_device(0xa460, 0xa463, 0, 0, read8_delegate(FUNC(pc9801_86_device::pc9801_86_ext_r), this), write8_delegate(FUNC(pc9801_86_device::pc9801_86_ext_w), this) );

}


//**************************************************************************
//  READ/WRITE HANDLERS
//**************************************************************************


READ8_MEMBER(pc9801_86_device::pc9801_86_r)
{
	if((offset & 1) == 0)
		return m_opna->read(space, offset >> 1);
	else // odd
	{
		printf("PC9801-86: Read to undefined port [%02x]\n",offset+0x188);
		return 0xff;
	}
}


WRITE8_MEMBER(pc9801_86_device::pc9801_86_w)
{
	if((offset & 1) == 0)
		m_opna->write(space, offset >> 1,data);
	else // odd
		printf("PC9801-86: Write to undefined port [%02x] %02x\n",offset+0x188,data);
}

#if 0
READ8_MEMBER( pc9801_86_device::pc9801_86_ext_r )
{
	if(offset == 0)
	{
		printf("OPNA EXT read ID [%02x]\n",offset);
		return 0xff;
	}

	printf("OPNA EXT read unk [%02x]\n",offset);
	return 0xff;
}

WRITE8_MEMBER( pc9801_86_device::pc9801_86_ext_w )
{
	if(offset == 0)
	{
		printf("OPNA EXT write mask %02x -> [%02x]\n",data,offset);
		return;
	}

	printf("OPNA EXT write unk %02x -> [%02x]\n",data,offset);
}
#endif