summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/odyssey2/slot.h
blob: cec7e2b8eb5950e3be46c2e954a391e440f21087 (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
// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
#ifndef MAME_BUS_ODYSSEY2_SLOT_H
#define MAME_BUS_ODYSSEY2_SLOT_H

#pragma once

#include "softlist_dev.h"


/***************************************************************************
 TYPE DEFINITIONS
 ***************************************************************************/


/* PCB */
enum
{
	O2_STD = 0,
	O2_ROM12,
	O2_ROM16,
	O2_CHESS,
	O2_VOICE
};


// ======================> device_o2_cart_interface

class device_o2_cart_interface : public device_interface
{
public:
	// construction/destruction
	virtual ~device_o2_cart_interface();

	// reading and writing
	virtual uint8_t read_rom04(offs_t offset) { return 0xff; }
	virtual uint8_t read_rom0c(offs_t offset) { return 0xff; }
	virtual void write_bank(int bank) { }

	virtual void io_write(offs_t offset, uint8_t data) { }
	virtual uint8_t io_read(offs_t offset) { return 0xff; }
	virtual DECLARE_READ_LINE_MEMBER(t0_read) { return 0; }

	virtual void cart_init() { } // called after loading ROM

	void rom_alloc(uint32_t size, const char *tag);
	void ram_alloc(uint32_t size);
	uint8_t* get_rom_base() { return m_rom; }
	uint8_t* get_ram_base() { return &m_ram[0]; }
	uint32_t get_rom_size() { return m_rom_size; }
	uint32_t get_ram_size() { return m_ram.size(); }

protected:
	device_o2_cart_interface(const machine_config &mconfig, device_t &device);

	// internal state
	uint8_t *m_rom;
	uint32_t m_rom_size;
	std::vector<uint8_t> m_ram;
};


// ======================> o2_cart_slot_device

class o2_cart_slot_device : public device_t,
								public device_image_interface,
								public device_single_card_slot_interface<device_o2_cart_interface>
{
public:
	// construction/destruction
	template <typename T>
	o2_cart_slot_device(machine_config const &mconfig, char const *tag, device_t *owner, T &&opts, char const *dflt)
		: o2_cart_slot_device(mconfig, tag, owner, 0)
	{
		option_reset();
		opts(*this);
		set_default_option(dflt);
		set_fixed(false);
	}

	o2_cart_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
	virtual ~o2_cart_slot_device();

	// image-level overrides
	virtual image_init_result call_load() override;
	virtual void call_unload() override { }

	virtual iodevice_t image_type() const noexcept override { return IO_CARTSLOT; }
	virtual bool is_readable()  const noexcept override { return true; }
	virtual bool is_writeable() const noexcept override { return false; }
	virtual bool is_creatable() const noexcept override { return false; }
	virtual bool must_be_loaded() const noexcept override { return false; }
	virtual bool is_reset_on_load() const noexcept override { return true; }
	virtual const char *image_interface() const noexcept override { return "odyssey_cart"; }
	virtual const char *file_extensions() const noexcept override { return "bin,rom"; }

	// slot interface overrides
	virtual std::string get_default_card_software(get_default_card_software_hook &hook) const override;

	int get_type() { return m_type; }

	// reading and writing
	uint8_t read_rom04(offs_t offset);
	uint8_t read_rom0c(offs_t offset);
	void io_write(offs_t offset, uint8_t data);
	uint8_t io_read(offs_t offset);
	DECLARE_READ_LINE_MEMBER(t0_read) { if (m_cart) return m_cart->t0_read(); else return 0; }

	void write_bank(int bank) { if (m_cart) m_cart->write_bank(bank); }

protected:
	// device-level overrides
	virtual void device_start() override;

	// device_image_interface implementation
	virtual const software_list_loader &get_software_list_loader() const override { return rom_software_list_loader::instance(); }

	int m_type;
	device_o2_cart_interface* m_cart;
};

// device type definition
DECLARE_DEVICE_TYPE(O2_CART_SLOT, o2_cart_slot_device)


/***************************************************************************
 DEVICE CONFIGURATION MACROS
 ***************************************************************************/

#define O2SLOT_ROM_REGION_TAG ":cart:rom"

void o2_cart(device_slot_interface &device);

#endif // MAME_BUS_ODYSSEY2_SLOT_H