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
|
// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
Acorn Floppy Disc Controller Board
Part No. 200,004
http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Acorn_fdc.html
**********************************************************************/
#include "emu.h"
#include "fdc.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(ACORN_FDC, acorn_fdc_device, "acorn_fdc", "Acorn Floppy Disc Controller Board")
//-------------------------------------------------
// MACHINE_DRIVER( fdc )
//-------------------------------------------------
FLOPPY_FORMATS_MEMBER(acorn_fdc_device::floppy_formats )
FLOPPY_ACORN_SSD_FORMAT
FLOPPY_FORMATS_END
static void acorn_floppies(device_slot_interface &device)
{
device.option_add("525sssd", FLOPPY_525_SSSD);
device.option_add("525sd", FLOPPY_525_SD);
device.option_add("525qd", FLOPPY_525_QD);
}
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
void acorn_fdc_device::device_add_mconfig(machine_config &config)
{
I8271(config, m_fdc, 4_MHz_XTAL / 2);
m_fdc->intrq_wr_callback().set(FUNC(acorn_fdc_device::bus_nmi_w));
m_fdc->hdl_wr_callback().set(FUNC(acorn_fdc_device::motor_w));
m_fdc->opt_wr_callback().set(FUNC(acorn_fdc_device::side_w));
FLOPPY_CONNECTOR(config, m_floppy[0], acorn_floppies, "525qd", acorn_fdc_device::floppy_formats).enable_sound(true);
FLOPPY_CONNECTOR(config, m_floppy[1], acorn_floppies, "525qd", acorn_fdc_device::floppy_formats).enable_sound(true);
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// acorn_fdc_device - constructor
//-------------------------------------------------
acorn_fdc_device::acorn_fdc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, ACORN_FDC, tag, owner, clock)
, device_acorn_bus_interface(mconfig, *this)
, m_fdc(*this, "i8271")
, m_floppy(*this, "i8271:%u", 0)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void acorn_fdc_device::device_start()
{
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void acorn_fdc_device::device_reset()
{
address_space &space = m_bus->memspace();
space.install_device(0x0a00, 0x0a03, *m_fdc, &i8271_device::map);
space.install_readwrite_handler(0x0a04, 0x0a04, 0, 0x1f8, 0, read8_delegate(FUNC(i8271_device::data_r), m_fdc.target()), write8_delegate(FUNC(i8271_device::data_w), m_fdc.target()));
}
//**************************************************************************
// IMPLEMENTATION
//**************************************************************************
WRITE_LINE_MEMBER(acorn_fdc_device::motor_w)
{
if (m_floppy[0]->get_device()) m_floppy[0]->get_device()->mon_w(!state);
if (m_floppy[1]->get_device()) m_floppy[1]->get_device()->mon_w(!state);
m_fdc->ready_w(!state);
}
WRITE_LINE_MEMBER(acorn_fdc_device::side_w)
{
if (m_floppy[0]->get_device()) m_floppy[0]->get_device()->ss_w(state);
if (m_floppy[1]->get_device()) m_floppy[1]->get_device()->ss_w(state);
}
WRITE_LINE_MEMBER(acorn_fdc_device::bus_nmi_w)
{
m_bus->nmi_w(state);
}
|