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
|
// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************
Micromint SB180
****************************************************************************/
#include "emu.h"
#include "cpu/z180/z180.h"
#include "imagedev/floppy.h"
#include "formats/imd_dsk.h"
#include "machine/upd765.h"
#include "bus/rs232/rs232.h"
#define FDC9266_TAG "u24"
class sb180_state : public driver_device
{
public:
sb180_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_fdc(*this, FDC9266_TAG)
, m_floppy(*this, FDC9266_TAG ":%u", 0)
{ }
void sb180(machine_config &config);
private:
virtual void machine_reset() override;
void sb180_io(address_map &map);
void sb180_mem(address_map &map);
required_device<z180_device> m_maincpu;
required_device<upd765a_device> m_fdc;
required_device_array<floppy_connector, 4> m_floppy;
};
void sb180_state::sb180_mem(address_map &map)
{
map.unmap_value_high();
map(0x00000, 0x01fff).rom().mirror(0x3e000);
map(0x40000, 0x7ffff).ram(); // 256KB RAM 8 * 41256 DRAM
}
void sb180_state::sb180_io(address_map &map)
{
map.global_mask(0xff);
map.unmap_value_high();
map(0x00, 0x7f).ram(); /* Z180 internal registers */
map(0x80, 0x81).m(m_fdc, FUNC(upd765a_device::map));
map(0xa0, 0xa0).rw(m_fdc, FUNC(upd765a_device::dma_r), FUNC(upd765a_device::dma_w));
}
/* Input ports */
static INPUT_PORTS_START( sb180 )
INPUT_PORTS_END
void sb180_state::machine_reset()
{
// motor is actually connected on TXS pin of CPU
for (auto &drive : m_floppy)
{
if (drive->get_device())
drive->get_device()->mon_w(0);
}
}
static void sb180_floppies(device_slot_interface &device)
{
device.option_add("35dd", FLOPPY_35_DD);
}
static void sb180_floppy_formats(format_registration &fr)
{
fr.add_mfm_containers();
fr.add(FLOPPY_IMD_FORMAT);
}
static DEVICE_INPUT_DEFAULTS_START( terminal )
DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_9600 )
DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_9600 )
DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_8 )
DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_NONE )
DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_1 )
DEVICE_INPUT_DEFAULTS_END
void sb180_state::sb180(machine_config &config)
{
/* basic machine hardware */
HD64180RP(config, m_maincpu, XTAL(12'288'000)); // location U17 HD64180
m_maincpu->set_addrmap(AS_PROGRAM, &sb180_state::sb180_mem);
m_maincpu->set_addrmap(AS_IO, &sb180_state::sb180_io);
m_maincpu->tend1_wr_callback().set(m_fdc, FUNC(upd765a_device::tc_line_w));
m_maincpu->txa1_wr_callback().set("rs232", FUNC(rs232_port_device::write_txd));
// FDC9266 location U24
UPD765A(config, m_fdc, XTAL(8'000'000));
m_fdc->intrq_wr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ2);
m_fdc->drq_wr_callback().set_inputline(m_maincpu, Z180_INPUT_LINE_DREQ1);
/* floppy drives */
FLOPPY_CONNECTOR(config, m_floppy[0], sb180_floppies, "35dd", sb180_floppy_formats);
FLOPPY_CONNECTOR(config, m_floppy[1], sb180_floppies, "35dd", sb180_floppy_formats);
FLOPPY_CONNECTOR(config, m_floppy[2], sb180_floppies, "35dd", sb180_floppy_formats);
FLOPPY_CONNECTOR(config, m_floppy[3], sb180_floppies, "35dd", sb180_floppy_formats);
rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "terminal"));
rs232.set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(terminal)); // must be below the DEVICE_INPUT_DEFAULTS_START block
rs232.rxd_handler().set(m_maincpu, FUNC(z180_device::rxa1_w));
}
/* ROM definition */
ROM_START( sb180 )
ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
ROM_LOAD( "monitor.bin", 0x0000, 0x2000, CRC(49640012) SHA1(ea571dc7476430e31b74bd1ab7a577e9013ad0bd))
ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
COMP( 1985, sb180, 0, 0, sb180, sb180, sb180_state, empty_init, "Micromint", "SB180", MACHINE_NO_SOUND)
|