summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/gameboy/slot.cpp
blob: a38ebf4bd3394ced63531a701c66082f5d0422ca (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
// license:BSD-3-Clause
// copyright-holders:Vas Crabb
/***************************************************************************

 Game Boy/Mega Duck cartridge slot interface

 The following ranges are available for use by the cartridge:
 * 0x0000-0x7FFF - Game Boy boot ROM expects to find header at 0x0100.
                   Writes typically used to control memory mapping.
 * 0xA000-0xBFFF - Typically used for additional RAM, sometimes
                   battery-backed.  Sometimes used for I/O.

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

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

//#define VERBOSE 1
//#define LOG_OUTPUT_FUNC osd_printf_info
#include "logmacro.h"


//**************************************************************************
//  gb_cart_slot_device_base
//**************************************************************************

void gb_cart_slot_device_base::call_unload()
{
	if (m_cart)
		m_cart->unload();
}


gb_cart_slot_device_base::gb_cart_slot_device_base(machine_config const &mconfig, device_type type, char const *tag, device_t *owner, u32 clock) :
	device_t(mconfig, type, tag, owner, clock),
	device_cartrom_image_interface(mconfig, *this),
	device_single_card_slot_interface<device_gb_cart_interface>(mconfig, *this),
	m_space(*this, finder_base::DUMMY_TAG, 8),
	m_cart(nullptr)
{
}


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


std::pair<std::error_condition, std::string> gb_cart_slot_device_base::call_load()
{
	if (!m_cart)
		return std::make_pair(std::error_condition(), std::string());

	std::error_condition result;
	std::string message;
	if (!loaded_through_softlist())
	{
		std::tie(result, message) = load_image_file(image_core_file());
		if (result)
			return std::make_pair(result, message);
	}

	result = m_cart->load(message);
	if (result)
	{
		if (result == image_error::BADSOFTWARE && !loaded_through_softlist())
			result = image_error::INVALIDIMAGE;
	}
	return std::make_pair(result, message);
}



//**************************************************************************
//  device_gb_cart_interface
//**************************************************************************

void device_gb_cart_interface::unload()
{
}


device_gb_cart_interface::device_gb_cart_interface(machine_config const &mconfig, device_t &device) :
	device_interface(device, "gameboycart"),
	m_slot(dynamic_cast<gb_cart_slot_device_base *>(device.owner()))
{
}