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
|
// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
First Byte Printer Interface
**********************************************************************/
#include "emu.h"
#include "fbprint.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(ELECTRON_FBPRINT, electron_fbprint_device, "electron_fbprint", "First Byte Printer Interface")
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
void electron_fbprint_device::device_add_mconfig(machine_config &config)
{
/* printer */
CENTRONICS(config, m_centronics, centronics_devices, "printer");
m_centronics->busy_handler().set([this](int state) { m_centronics_busy = state; });
output_latch_device &latch(OUTPUT_LATCH(config, "cent_data_out"));
m_centronics->set_output_latch(latch);
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// electron_fbprint_device - constructor
//-------------------------------------------------
electron_fbprint_device::electron_fbprint_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, ELECTRON_FBPRINT, tag, owner, clock)
, device_electron_expansion_interface(mconfig, *this)
, m_centronics(*this, "centronics")
, m_cent_data_out(*this, "cent_data_out")
, m_centronics_busy(0)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void electron_fbprint_device::device_start()
{
}
//-------------------------------------------------
// expbus_r - expansion data read
//-------------------------------------------------
uint8_t electron_fbprint_device::expbus_r(offs_t offset)
{
uint8_t data = 0xff;
if (offset == 0xfc72)
{
data = (m_centronics_busy << 7) | 0x7f;
}
return data;
}
//-------------------------------------------------
// expbus_w - expansion data write
//-------------------------------------------------
void electron_fbprint_device::expbus_w(offs_t offset, uint8_t data)
{
if (offset == 0xfc71)
{
m_cent_data_out->write(data);
m_centronics->write_strobe(0);
m_centronics->write_strobe(1);
}
}
|