summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/machine/hp80_optrom.h
blob: 2f4f6cd7250fb9ecfe40ec849424f0b758ad28dd (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
// license:BSD-3-Clause
// copyright-holders: F. Ulivi
/*********************************************************************

    hp80_optrom.h

    Optional ROMs for HP80 systems

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

#ifndef MAME_MACHINE_HP80_OPTROM_H
#define MAME_MACHINE_HP80_OPTROM_H

#pragma once

#include "imagedev/cartrom.h"

// Size of optional ROMs (8k)
static constexpr offs_t HP80_OPTROM_SIZE = 0x2000;

class hp80_optrom_device : public device_t,
						   public device_rom_image_interface
{
public:
	// construction/destruction
	hp80_optrom_device(machine_config const &mconfig, char const *tag, device_t *owner)
		: hp80_optrom_device(mconfig, tag, owner, (uint32_t)0)
	{
	}

	hp80_optrom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
	virtual ~hp80_optrom_device();

	void install_read_handler(address_space& space);

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

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

	virtual bool is_reset_on_load() const noexcept override { return true; }
	virtual const char *image_interface() const noexcept override { return "hp80_rom"; }
	virtual const char *file_extensions() const noexcept override { return "bin"; }

	uint8_t m_select_code;
};

// device type definition
DECLARE_DEVICE_TYPE(HP80_OPTROM, hp80_optrom_device)

#endif // MAME_MACHINE_HP80_OPTROM_H