summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/cpc/cpc_rom.cpp
blob: af5150862e93234d411d3188f35fc2c658022624 (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
// license:BSD-3-Clause
// copyright-holders:Barry Rodewald
/*
 * cpc_rom.cpp
 * Amstrad CPC mountable ROM image device
 *
 */

#include "emu.h"
#include "cpc_rom.h"

DEFINE_DEVICE_TYPE(CPC_ROM, cpc_rom_device, "cpc_rom", "CPC ROM Box")

void cpc_exp_cards(device_slot_interface &device);

//**************************************************************************
//  DEVICE CONFIG INTERFACE
//**************************************************************************

// device machine config
MACHINE_CONFIG_START(cpc_rom_device::device_add_mconfig)
	MCFG_CPC_ROMSLOT_ADD("rom1")
	MCFG_CPC_ROMSLOT_ADD("rom2")
	MCFG_CPC_ROMSLOT_ADD("rom3")
	MCFG_CPC_ROMSLOT_ADD("rom4")
	MCFG_CPC_ROMSLOT_ADD("rom5")
	MCFG_CPC_ROMSLOT_ADD("rom6")
	MCFG_CPC_ROMSLOT_ADD("rom7")
	MCFG_CPC_ROMSLOT_ADD("rom8")

	// pass-through
	MCFG_DEVICE_ADD("exp", CPC_EXPANSION_SLOT, 0)
	MCFG_DEVICE_SLOT_INTERFACE(cpc_exp_cards, nullptr, false)
	MCFG_CPC_EXPANSION_SLOT_OUT_IRQ_CB(DEVWRITELINE("^", cpc_expansion_slot_device, irq_w))
	MCFG_CPC_EXPANSION_SLOT_OUT_NMI_CB(DEVWRITELINE("^", cpc_expansion_slot_device, nmi_w))
	MCFG_CPC_EXPANSION_SLOT_OUT_ROMDIS_CB(DEVWRITELINE("^", cpc_expansion_slot_device, romdis_w))  // ROMDIS

MACHINE_CONFIG_END


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

cpc_rom_device::cpc_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
	device_t(mconfig, CPC_ROM, tag, owner, clock),
	device_cpc_expansion_card_interface(mconfig, *this),
	m_rom(*this, "rom%u", 1)
{
}

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

void cpc_rom_device::device_start()
{
}

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

void cpc_rom_device::device_reset()
{
}


/*** ROM image device ***/

// device type definition
DEFINE_DEVICE_TYPE(CPC_ROMSLOT, cpc_rom_image_device, "cpc_rom_image", "CPC ROM image")

//-------------------------------------------------
//  cpc_rom_image_device - constructor
//-------------------------------------------------

cpc_rom_image_device::cpc_rom_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
	: device_t(mconfig, CPC_ROMSLOT, tag, owner, clock)
	, device_image_interface(mconfig, *this)
	, m_base(nullptr)
{
}

//-------------------------------------------------
//  cpc_rom_image_device - destructor
//-------------------------------------------------

cpc_rom_image_device::~cpc_rom_image_device()
{
}

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

void cpc_rom_image_device::device_start()
{
	m_base = nullptr;
}

/*-------------------------------------------------
    DEVICE_IMAGE_LOAD( rom )
-------------------------------------------------*/
image_init_result cpc_rom_image_device::call_load()
{
	device_image_interface* image = this;
	uint64_t size = image->length();

	m_base = std::make_unique<uint8_t[]>(16384);
	if(size <= 16384)
	{
		image->fread(m_base.get(),size);
	}
	else
	{
		image->fseek(size-16384,SEEK_SET);
		image->fread(m_base.get(),16384);
	}

	return image_init_result::PASS;
}


/*-------------------------------------------------
    DEVICE_IMAGE_UNLOAD( rom )
-------------------------------------------------*/
void cpc_rom_image_device::call_unload()
{
	m_base = nullptr;
}