summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/vectrex/slot.cpp
blob: a7322b0b994d2236e2e0890b5fdf7f569fd26669 (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
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/***********************************************************************************************************

    GCE Vectrex cart emulation
    (through slot devices)

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


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

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

const device_type VECTREX_CART_SLOT = &device_creator<vectrex_cart_slot_device>;

//**************************************************************************
//    Vectrex Cartridges Interface
//**************************************************************************

//-------------------------------------------------
//  device_vectrex_cart_interface - constructor
//-------------------------------------------------

device_vectrex_cart_interface::device_vectrex_cart_interface(const machine_config &mconfig, device_t &device)
	: device_slot_card_interface(mconfig, device),
		m_rom(nullptr),
		m_rom_size(0)
{
}


//-------------------------------------------------
//  ~device_vectrex_cart_interface - destructor
//-------------------------------------------------

device_vectrex_cart_interface::~device_vectrex_cart_interface()
{
}

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

void device_vectrex_cart_interface::rom_alloc(UINT32 size, const char *tag)
{
	if (m_rom == nullptr)
	{
		m_rom = device().machine().memory().region_alloc(std::string(tag).append(VECSLOT_ROM_REGION_TAG).c_str(), size, 1, ENDIANNESS_LITTLE)->base();
		m_rom_size = size;
	}
}


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

//-------------------------------------------------
//  vectrex_cart_slot_device - constructor
//-------------------------------------------------
vectrex_cart_slot_device::vectrex_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
						device_t(mconfig, VECTREX_CART_SLOT, "GCE Vectrex Cartridge Slot", tag, owner, clock, "vectrex_cart_slot", __FILE__),
						device_image_interface(mconfig, *this),
						device_slot_interface(mconfig, *this),
						m_type(VECTREX_STD),
						m_vec3d(VEC3D_NONE), m_cart(nullptr)
{
}


//-------------------------------------------------
//  vectrex_cart_slot_device - destructor
//-------------------------------------------------

vectrex_cart_slot_device::~vectrex_cart_slot_device()
{
}

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

void vectrex_cart_slot_device::device_start()
{
	m_cart = dynamic_cast<device_vectrex_cart_interface *>(get_card_device());
}

//-------------------------------------------------
//  device_config_complete - perform any
//  operations now that the configuration is
//  complete
//-------------------------------------------------

void vectrex_cart_slot_device::device_config_complete()
{
	// set brief and instance name
	update_names();
}


//-------------------------------------------------
//  Vectrex PCB
//-------------------------------------------------

struct vectrex_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 vectrex_slot slot_list[] =
{
	{ VECTREX_STD,    "vec_rom" },
	{ VECTREX_64K,    "vec_rom64k" },
	{ VECTREX_SRAM,   "vec_sram" }
};

#if 0
static int vectrex_get_pcb_id(const char *slot)
{
	for (int i = 0; i < ARRAY_LENGTH(slot_list); i++)
	{
		if (!core_stricmp(slot_list[i].slot_option, slot))
			return slot_list[i].pcb_id;
	}

	return 0;
}
#endif

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

	return "vec_rom";
}

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

bool vectrex_cart_slot_device::call_load()
{
	if (m_cart)
	{
		UINT32 size = (software_entry() == nullptr) ? length() : get_software_region_length("rom");
		UINT8 *ROM;

		if (size > 0x10000)
		{
			seterror(IMAGE_ERROR_UNSPECIFIED, "Unsupported cartridge size");
			return IMAGE_INIT_FAIL;
		}

		m_cart->rom_alloc((size < 0x1000) ? 0x1000 : size, tag());
		ROM = m_cart->get_rom_base();

		if (software_entry() == nullptr)
			fread(ROM, size);
		else
			memcpy(ROM, get_software_region("rom"), size);

		// Verify the file is accepted by the Vectrex bios
		if (memcmp(ROM, "g GCE", 5))
		{
			seterror(IMAGE_ERROR_UNSPECIFIED, "Invalid image");
			return IMAGE_INIT_FAIL;
		}

		// determine type
		m_type = VECTREX_STD;
		if (!memcmp(ROM + 0x06, "SRAM", 4))
			m_type = VECTREX_SRAM;
		if (size > 0x8000)
			m_type = VECTREX_64K;

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

		// determine 3D setup (to help video setup at machine_start)
		if (!memcmp(ROM + 0x11, "NARROW", 6) && (ROM[0x39] == 0x0c))
			m_vec3d = VEC3D_NARROW;

		if (!memcmp(ROM + 0x11, "CRAZY COASTER", 13))
			m_vec3d = VEC3D_CCOAST;

		if (!memcmp(ROM + 0x11, "3D MINE STORM", 13))
			m_vec3d = VEC3D_MINEST;

		return IMAGE_INIT_PASS;
	}

	return IMAGE_INIT_PASS;
}


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

bool vectrex_cart_slot_device::call_softlist_load(software_list_device &swlist, const char *swname, const rom_entry *start_entry)
{
	load_software_part_region(*this, swlist, swname, start_entry);
	return TRUE;
}


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

void vectrex_cart_slot_device::get_default_card_software(std::string &result)
{
	if (open_image_file(mconfig().options()))
	{
		const char *slot_string = "vec_rom";
		UINT32 size = core_fsize(m_file);
		dynamic_buffer rom(size);
		int type = VECTREX_STD;

		core_fread(m_file, &rom[0], size);

		if (!memcmp(&rom[0x06], "SRAM", 4))
			type = VECTREX_SRAM;
		if (size > 0x8000)
			type = VECTREX_64K;

		slot_string = vectrex_get_slot(type);

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

		result.assign(slot_string);
		return;
	}

	software_get_default_slot(result, "vec_rom");
}

/*-------------------------------------------------
 read_rom
 -------------------------------------------------*/

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

/*-------------------------------------------------
 write_ram
 -------------------------------------------------*/

WRITE8_MEMBER(vectrex_cart_slot_device::write_ram)
{
	if (m_cart)
		m_cart->write_ram(space, offset, data);
}

/*-------------------------------------------------
 write_bank
 -------------------------------------------------*/

WRITE8_MEMBER(vectrex_cart_slot_device::write_bank)
{
	if (m_cart)
		m_cart->write_bank(space, offset, data);
}