summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/astrocde/slot.cpp
blob: 15135e08af1787e30e44cf9cb1fe8b579eab9833 (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
201
202
203
204
205
206
207
208
209
210
211
212
// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/***********************************************************************************************************

    Bally Astrocade cart emulation
    (through slot devices)

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


#include "emu.h"
#include "slot.h"

//**************************************************************************
//  GLOBAL VARIABLES
//**************************************************************************

DEFINE_DEVICE_TYPE(ASTROCADE_CART_SLOT, astrocade_cart_slot_device, "astrocade_cart_slot", "Bally Astrocade Cartridge Slot")

//**************************************************************************
//    Astrocade Cartridges Interface
//**************************************************************************

//-------------------------------------------------
//  device_astrocade_cart_interface - constructor
//-------------------------------------------------

device_astrocade_cart_interface::device_astrocade_cart_interface(const machine_config &mconfig, device_t &device) :
	device_interface(device, "astrocadecart"),
	m_rom(nullptr),
	m_rom_size(0)
{
}


//-------------------------------------------------
//  ~device_astrocade_cart_interface - destructor
//-------------------------------------------------

device_astrocade_cart_interface::~device_astrocade_cart_interface()
{
}

//-------------------------------------------------
//  rom_alloc - alloc the space for the cart
//-------------------------------------------------

void device_astrocade_cart_interface::rom_alloc(uint32_t size, const char *tag)
{
	if (m_rom == nullptr)
	{
		m_rom = device().machine().memory().region_alloc(std::string(tag).append(ASTROCADESLOT_ROM_REGION_TAG).c_str(), size, 1, ENDIANNESS_LITTLE)->base();
		m_rom_size = size;
	}
}


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

//-------------------------------------------------
//  astrocade_cart_slot_device - constructor
//-------------------------------------------------
astrocade_cart_slot_device::astrocade_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
	device_t(mconfig, ASTROCADE_CART_SLOT, tag, owner, clock),
	device_image_interface(mconfig, *this),
	device_single_card_slot_interface<device_astrocade_cart_interface>(mconfig, *this),
	m_type(ASTROCADE_STD), m_cart(nullptr)
{
}


//-------------------------------------------------
//  astrocade_cart_slot_device - destructor
//-------------------------------------------------

astrocade_cart_slot_device::~astrocade_cart_slot_device()
{
}

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

void astrocade_cart_slot_device::device_start()
{
	m_cart = get_card_device();
}


//-------------------------------------------------
//  ASTROCADE PCB
//-------------------------------------------------

struct astrocade_slot
{
	int                     pcb_id;
	const char              *slot_option;
};

// Here, we take the feature attribute from .xml (i.e. the PCB name) and we assign a unique ID to it
static const astrocade_slot slot_list[] =
{
	{ ASTROCADE_STD,  "rom" },
	{ ASTROCADE_256K, "rom_256k" },
	{ ASTROCADE_512K, "rom_512k" },
	{ ASTROCADE_CASS, "rom_cass" }
};

static int astrocade_get_pcb_id(const char *slot)
{
	for (auto & elem : slot_list)
	{
		if (!core_stricmp(elem.slot_option, slot))
			return elem.pcb_id;
	}

	return 0;
}

static const char *astrocade_get_slot(int type)
{
	for (auto & elem : slot_list)
	{
		if (elem.pcb_id == type)
			return elem.slot_option;
	}

	return "std";
}


/*-------------------------------------------------
 call load
 -------------------------------------------------*/

image_init_result astrocade_cart_slot_device::call_load()
{
	if (m_cart)
	{
		uint32_t size = !loaded_through_softlist() ? length() : get_software_region_length("rom");
		m_cart->rom_alloc(size, tag());

		if (!loaded_through_softlist())
			fread(m_cart->get_rom_base(), size);
		else
			memcpy(m_cart->get_rom_base(), get_software_region("rom"), size);

		if (!loaded_through_softlist())
		{
			m_type = ASTROCADE_STD;

			if (size == 0x40000)
				m_type = ASTROCADE_256K;
			if (size == 0x80000)
				m_type = ASTROCADE_512K;
		}
		else
		{
			const char *pcb_name = get_feature("slot");
			if (pcb_name)
				m_type = astrocade_get_pcb_id(pcb_name);
		}

		//printf("Type: %s\n", astrocade_get_slot(m_type));

		return image_init_result::PASS;
	}

	return image_init_result::PASS;
}


/*-------------------------------------------------
 get default card software
 -------------------------------------------------*/

std::string astrocade_cart_slot_device::get_default_card_software(get_default_card_software_hook &hook) const
{
	if (hook.image_file())
	{
		const char *slot_string;
		uint32_t size = hook.image_file()->size();
		int type = ASTROCADE_STD;

		if (size == 0x40000)
			type = ASTROCADE_256K;
		if (size == 0x80000)
			type = ASTROCADE_512K;

		slot_string = astrocade_get_slot(type);

		//printf("type: %s\n", slot_string);

		return std::string(slot_string);
	}

	return software_get_default_slot("rom");
}

/*-------------------------------------------------
 read
 -------------------------------------------------*/

READ8_MEMBER(astrocade_cart_slot_device::read_rom)
{
	if (m_cart)
		return m_cart->read_rom(space, offset);
	else
		return 0xff;
}