summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/electron/m2105.cpp
blob: ba437842a4ceb39d7d9945b3f19bdb449ffa21da (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
// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************

    BT Merlin M2105

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


#include "emu.h"
#include "m2105.h"
#include "speaker.h"


//**************************************************************************
//  DEVICE DEFINITIONS
//**************************************************************************

const device_type ELECTRON_M2105 = device_creator<electron_m2105_device>;


//-------------------------------------------------
//  ROM( m2105 )
//-------------------------------------------------

ROM_START( m2105 )
	ROM_REGION(0x10000, "exp_rom", 0)
	ROM_DEFAULT_BIOS("v350")

	ROM_SYSTEM_BIOS(0, "v350", "V3.50 16/02/87")
	ROMX_LOAD("ic22-sm-35l-1.ic22", 0x0000, 0x4000, CRC(e8f8a639) SHA1(eb7fa1e884be9c072ae0c1e598507b802422127f), ROM_BIOS(1))
	ROMX_LOAD("ic23-sm-35l-1.ic23", 0x4000, 0x4000, CRC(b1bb1d83) SHA1(07ca3a93744519b8d03bbf1c3c3537c0a0a3c6fe), ROM_BIOS(1))
	ROMX_LOAD("sk01-pc-35l-1.ic24", 0x8000, 0x4000, CRC(54fd4c09) SHA1(9588296306581580ba223cf6bce4be61476f14c4), ROM_BIOS(1))
	ROMX_LOAD("sk02-pc-35l-1.ic24", 0xc000, 0x4000, CRC(c08de988) SHA1(86f2da5f8e9a5301ad40360e286f841f42e94a99), ROM_BIOS(1))

	ROM_SYSTEM_BIOS(1, "v341", "V3.41 26/11/85")
	ROMX_LOAD("ic22-sm-34l-1.ic22", 0x0000, 0x4000, CRC(b514b15f) SHA1(a9c6c20b5a4f860b000511dde2f54497bcdd97b0), ROM_BIOS(2))
	ROMX_LOAD("ic23-sm-34l-1.ic23", 0x4000, 0x4000, CRC(18875889) SHA1(d1a7dd87c4d99869a1961becec5e9d567d8fad53), ROM_BIOS(2))
	ROMX_LOAD("sk01-pc-34l-1.ic24", 0x8000, 0x4000, CRC(a8796c9e) SHA1(29bc01b8f7617b252e4b243d13b1bbd3cd32cc3b), ROM_BIOS(2))
	ROMX_LOAD("sk02-pc-34l-1.ic24", 0xc000, 0x4000, CRC(fa74063c) SHA1(cdc31c606e69e7a6d221b7340a310d475d487fc9), ROM_BIOS(2))

	ROM_SYSTEM_BIOS(2, "v207", "V2.07 14/03/85")
	ROMX_LOAD("ic22-sm-207l-1.ic22", 0x0000, 0x4000, CRC(0c431547) SHA1(13d2eab49b9c79f507b7dd8436d1e56cf43be412), ROM_BIOS(3))
	ROMX_LOAD("ic23-sm-207l-1.ic23", 0x4000, 0x4000, CRC(15044d49) SHA1(e75fe4321579a9027527a0e256050d1444b3fe82), ROM_BIOS(3))
	ROMX_LOAD("sk01-pc-207l-1.ic24", 0x8000, 0x4000, CRC(0850bcea) SHA1(270e7a31e69e1454cfb70ced23a50f5d97efe4d5), ROM_BIOS(3))
	ROMX_LOAD("sk02-pc-207l-1.ic24", 0xc000, 0x4000, CRC(d8b9143f) SHA1(4e132c7a6dae4caf7203139b51882706d508c449), ROM_BIOS(3))

	ROM_REGION(0x4000, "vsm", 0) /* system speech PHROM */
	ROM_LOAD("phroma.bin", 0x0000, 0x4000, CRC(98e1bf9e) SHA1(b369809275cb67dfd8a749265e91adb2d2558ae6))
ROM_END


//-------------------------------------------------
//  MACHINE_DRIVER( m2105 )
//-------------------------------------------------

static MACHINE_CONFIG_FRAGMENT( m2105 )
	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")

	MCFG_INPUT_MERGER_ACTIVE_HIGH("irqs")
	MCFG_INPUT_MERGER_OUTPUT_HANDLER(WRITELINE(electron_m2105_device, intrq_w))

	/* system via */
	MCFG_DEVICE_ADD("via6522_0", VIA6522, 1000000)
	/*MCFG_VIA6522_READPA_HANDLER(READ8(electron_m2105_device, m2105_via_system_read_porta))
	MCFG_VIA6522_READPB_HANDLER(READ8(electron_m2105_device, m2105_via_system_read_portb))
	MCFG_VIA6522_WRITEPA_HANDLER(WRITE8(electron_m2105_device, m2105_via_system_write_porta))
	MCFG_VIA6522_WRITEPB_HANDLER(WRITE8(electron_m2105_device, m2105_via_system_write_portb))*/
	MCFG_VIA6522_IRQ_HANDLER(DEVWRITELINE("irqs", input_merger_active_high_device, in0_w))

	/* user via */
	MCFG_DEVICE_ADD("via6522_1", VIA6522, 1000000)
	//MCFG_VIA6522_READPB_HANDLER(READ8(electron_m2105_device, m2105_via_user_read_portb))
	MCFG_VIA6522_WRITEPA_HANDLER(DEVWRITE8("cent_data_out", output_latch_device, write))
	//MCFG_VIA6522_WRITEPB_HANDLER(WRITE8(electron_m2105_device, m2105_via_user_write_portb))
	MCFG_VIA6522_CA2_HANDLER(DEVWRITELINE("centronics", centronics_device, write_strobe))
	MCFG_VIA6522_IRQ_HANDLER(DEVWRITELINE("irqs", input_merger_active_high_device, in1_w))

	/* duart */
	MCFG_MC68681_ADD("sc2681", XTAL_3_6864MHz)
	MCFG_MC68681_IRQ_CALLBACK(DEVWRITELINE("irqs", input_merger_active_high_device, in2_w))
	MCFG_MC68681_A_TX_CALLBACK(DEVWRITELINE("rs232", rs232_port_device, write_txd))
	//MCFG_MC68681_OUTPORT_CALLBACK(WRITE8(electron_m2105_device, sio_out_w))

	MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, nullptr)
	MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sc2681", mc68681_device, rx_a_w))

	/* printer */
	MCFG_CENTRONICS_ADD("centronics", centronics_devices, "printer")
	MCFG_CENTRONICS_ACK_HANDLER(DEVWRITELINE("via6522_1", via6522_device, write_ca1)) MCFG_DEVCB_INVERT /* ack seems to be inverted? */
	MCFG_CENTRONICS_OUTPUT_LATCH_ADD("cent_data_out", "centronics")

	/* speech hardware */
	MCFG_DEVICE_ADD("vsm", SPEECHROM, 0)
	MCFG_SOUND_ADD("tms5220", TMS5220, 640000)
	MCFG_TMS52XX_SPEECHROM("vsm")
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END


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

machine_config_constructor electron_m2105_device::device_mconfig_additions() const
{
	return MACHINE_CONFIG_NAME( m2105 );
}

const tiny_rom_entry *electron_m2105_device::device_rom_region() const
{
	return ROM_NAME( m2105 );
}

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

//-------------------------------------------------
//  electron_m2105_device - constructor
//-------------------------------------------------

electron_m2105_device::electron_m2105_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
	: device_t(mconfig, ELECTRON_M2105, "Acorn M2105 Expansion", tag, owner, clock, "electron_m2105", __FILE__),
		device_electron_expansion_interface(mconfig, *this),
		m_exp_rom(*this, "exp_rom"),
		m_via6522_0(*this, "via6522_0"),
		m_via6522_1(*this, "via6522_1"),
		m_duart(*this, "sc2681"),
		m_tms(*this, "tms5220"),
		m_centronics(*this, "centronics"),
		m_irqs(*this, "irqs")
{
}

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

void electron_m2105_device::device_start()
{
	address_space& space = machine().device("maincpu")->memory().space(AS_PROGRAM);
	m_slot = dynamic_cast<electron_expansion_slot_device *>(owner());

	space.install_readwrite_handler(0xfc40, 0xfc5f, READ8_DEVICE_DELEGATE(m_via6522_1, via6522_device, read), WRITE8_DEVICE_DELEGATE(m_via6522_1, via6522_device, write));
	space.install_readwrite_handler(0xfc60, 0xfc6f, READ8_DEVICE_DELEGATE(m_duart, mc68681_device, read), WRITE8_DEVICE_DELEGATE(m_duart, mc68681_device, write));
	space.install_readwrite_handler(0xfc70, 0xfc8f, READ8_DEVICE_DELEGATE(m_via6522_0, via6522_device, read), WRITE8_DEVICE_DELEGATE(m_via6522_0, via6522_device, write));
}

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

void electron_m2105_device::device_reset()
{
	machine().root_device().membank("bank2")->configure_entry(12, memregion("exp_rom")->base() + 0x0000);
	machine().root_device().membank("bank2")->configure_entry(13, memregion("exp_rom")->base() + 0x4000);
	machine().root_device().membank("bank2")->configure_entry( 0, memregion("exp_rom")->base() + 0x8000);
	machine().root_device().membank("bank2")->configure_entry( 2, memregion("exp_rom")->base() + 0xc000);
}


//**************************************************************************
//  IMPLEMENTATION
//**************************************************************************

WRITE_LINE_MEMBER(electron_m2105_device::intrq_w)
{
	m_slot->irq_w(state);
}