summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/ampro.cpp
blob: 0239e7a9590b77d6bf43f3bb5b88f0f1fbefff83 (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
// license:BSD-3-Clause
// copyright-holders:Robbbert
/***************************************************************************

Ampro Little Z80 Board

2013-09-02 Skeleton driver.

Chips: Z80A @4MHz, Z80CTC, Z80DART, WD1770/2, NCR5380. Crystal: 16 MHz

This is a complete CP/M single-board computer that could be mounted
on top of a standard 13cm floppy drive. You needed to supply your own
power supply and serial terminal.

The later versions included a SCSI chip (NCR5380) enabling the use
of a hard drive of up to 88MB.

ToDo:
- (maybe) add scsi interface
- Add printer

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

#include "emu.h"
#include "bus/rs232/rs232.h"
#include "cpu/z80/z80.h"
#include "machine/z80daisy.h"
#include "machine/z80ctc.h"
#include "machine/z80dart.h"
#include "machine/wd_fdc.h"
#include "machine/clock.h"
#include "machine/timer.h"
#include "softlist.h"

class ampro_state : public driver_device
{
public:
	ampro_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag)
		, m_maincpu(*this, "maincpu")
		, m_dart(*this, "dart")
		, m_ctc (*this, "ctc")
		, m_fdc (*this, "fdc")
		, m_floppy0(*this, "fdc:0")
	{ }

	void init_ampro();
	void machine_reset_ampro();
	TIMER_DEVICE_CALLBACK_MEMBER(ctc_tick);
	DECLARE_WRITE8_MEMBER(port00_w);
	DECLARE_READ8_MEMBER(io_r);
	DECLARE_WRITE8_MEMBER(io_w);

	void ampro(machine_config &config);
	void ampro_io(address_map &map);
	void ampro_mem(address_map &map);
private:
	required_device<cpu_device> m_maincpu;
	required_device<z80dart_device> m_dart;
	required_device<z80ctc_device> m_ctc;
	required_device<wd1772_device> m_fdc;
	required_device<floppy_connector> m_floppy0;
};

/*
d0..d3 Drive select 0-3 (we only emulate 1 drive)
d4     Side select 0=side0
d5     /DDEN
d6     Banking 0=rom
d7     FDC master clock 0=8MHz 1=16MHz (for 20cm disks, not emulated)
*/
WRITE8_MEMBER( ampro_state::port00_w )
{
	membank("bankr0")->set_entry(BIT(data, 6));
	m_fdc->dden_w(BIT(data, 5));
	floppy_image_device *floppy = nullptr;
	if (BIT(data, 0)) floppy = m_floppy0->get_device();
	m_fdc->set_floppy(floppy);
	if (floppy)
		floppy->ss_w(BIT(data, 4));
}

READ8_MEMBER( ampro_state::io_r )
{
	if (offset < 0x40)
		return m_ctc->read(space, offset>>4);
	else
		return m_dart->ba_cd_r(space, offset>>2);
}

WRITE8_MEMBER( ampro_state::io_w )
{
	if (offset < 0x40)
		m_ctc->write(space, offset>>4, data);
	else
		m_dart->ba_cd_w(space, offset>>2, data);
}

void ampro_state::ampro_mem(address_map &map)
{
	map.unmap_value_high();
	map(0x0000, 0x0fff).bankr("bankr0").bankw("bankw0");
	map(0x1000, 0xffff).ram();
}

void ampro_state::ampro_io(address_map &map)
{
	map.unmap_value_high();
	map.global_mask(0xff);
	map(0x00, 0x00).w(this, FUNC(ampro_state::port00_w)); // system
	//AM_RANGE(0x01, 0x01) AM_WRITE(port01_w) // printer data
	//AM_RANGE(0x02, 0x03) AM_WRITE(port02_w) // printer strobe
	//AM_RANGE(0x20, 0x27) AM_READWRITE() // scsi chip
	//AM_RANGE(0x28, 0x28) AM_WRITE(port28_w) // scsi control
	//AM_RANGE(0x29, 0x29) AM_READ(port29_r) // ID port
	map(0x40, 0x8f).rw(this, FUNC(ampro_state::io_r), FUNC(ampro_state::io_w));
	map(0xc0, 0xc3).w(m_fdc, FUNC(wd1772_device::write));
	map(0xc4, 0xc7).r(m_fdc, FUNC(wd1772_device::read));
}

static const z80_daisy_config daisy_chain_intf[] =
{
	{ "ctc" },
	{ "dart" },
	{ nullptr }
};

static void ampro_floppies(device_slot_interface &device)
{
	device.option_add("525dd", FLOPPY_525_DD);
}

/* Input ports */
static INPUT_PORTS_START( ampro )
INPUT_PORTS_END

void ampro_state::machine_reset_ampro()
{
	membank("bankr0")->set_entry(0); // point at rom
	membank("bankw0")->set_entry(0); // always write to ram
}

void ampro_state::init_ampro()
{
	uint8_t *main = memregion("maincpu")->base();

	membank("bankr0")->configure_entry(1, &main[0x0000]);
	membank("bankr0")->configure_entry(0, &main[0x10000]);
	membank("bankw0")->configure_entry(0, &main[0x0000]);
}

MACHINE_CONFIG_START(ampro_state::ampro)
	/* basic machine hardware */
	MCFG_DEVICE_ADD("maincpu",Z80, XTAL(16'000'000) / 4)
	MCFG_DEVICE_PROGRAM_MAP(ampro_mem)
	MCFG_DEVICE_IO_MAP(ampro_io)
	MCFG_Z80_DAISY_CHAIN(daisy_chain_intf)
	set_machine_reset_cb(config, driver_callback_delegate(&machine_reset_ampro, this));

	MCFG_DEVICE_ADD("ctc_clock", CLOCK, XTAL(16'000'000) / 8) // 2MHz
	MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE("ctc", z80ctc_device, trg0))
	MCFG_DEVCB_CHAIN_OUTPUT(WRITELINE("ctc", z80ctc_device, trg1))

	/* Devices */
	MCFG_DEVICE_ADD("ctc", Z80CTC, XTAL(16'000'000) / 4)
	MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
	MCFG_Z80CTC_ZC0_CB(WRITELINE("dart", z80dart_device, txca_w))    // Z80DART Ch A, SIO Ch A
	MCFG_DEVCB_CHAIN_OUTPUT(WRITELINE("dart", z80dart_device, rxca_w))
	MCFG_Z80CTC_ZC1_CB(WRITELINE("dart", z80dart_device, rxtxcb_w))   // SIO Ch B

	MCFG_DEVICE_ADD("dart", Z80DART, XTAL(16'000'000) / 4)
	MCFG_Z80DART_OUT_TXDA_CB(WRITELINE("rs232", rs232_port_device, write_txd))
	MCFG_Z80DART_OUT_DTRA_CB(WRITELINE("rs232", rs232_port_device, write_dtr))
	MCFG_Z80DART_OUT_RTSA_CB(WRITELINE("rs232", rs232_port_device, write_rts))
	MCFG_Z80DART_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))

	MCFG_DEVICE_ADD("rs232", RS232_PORT, default_rs232_devices, "terminal")
	MCFG_RS232_RXD_HANDLER(WRITELINE("dart", z80dart_device, rxa_w))

	MCFG_WD1772_ADD("fdc", XTAL(16'000'000) / 2)
	MCFG_FLOPPY_DRIVE_ADD("fdc:0", ampro_floppies, "525dd", floppy_image_device::default_floppy_formats)
	MCFG_FLOPPY_DRIVE_SOUND(true)
	MCFG_SOFTWARE_LIST_ADD("flop_list", "ampro")
MACHINE_CONFIG_END

/* ROM definition */
ROM_START( ampro )
	ROM_REGION( 0x11000, "maincpu", ROMREGION_ERASEFF )
	ROM_SYSTEM_BIOS( 0, "mntr", "Monitor")
	ROMX_LOAD( "mntr", 0x10000, 0x1000, CRC(d59d0909) SHA1(936410f414b1e71445253840eea0045545e4ff0b), ROM_BIOS(1))
	ROM_SYSTEM_BIOS( 1, "boot", "Boot")
	ROMX_LOAD( "boot", 0x10000, 0x1000, CRC(b3524046) SHA1(5466f7d28c1a04cfbf328095cb35ad1525e91f44), ROM_BIOS(2))
	ROM_SYSTEM_BIOS( 2, "scsi", "SCSI Boot")
	ROMX_LOAD( "scsi", 0x10000, 0x1000, CRC(8eb20e5d) SHA1(0ab1ff65cf6d3c1a713a8ac5c1ee4c662ac3da0c), ROM_BIOS(3))
ROM_END

/* Driver */

//    YEAR  NAME   PARENT  COMPAT  MACHINE  INPUT  CLASS        INIT        COMPANY  FULLNAME            FLAGS
COMP( 1980, ampro, 0,      0,      ampro,   ampro, ampro_state, init_ampro, "Ampro", "Little Z80 Board", 0 )