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path: root/src/mame/drivers/sega_beena.cpp
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// license:BSD-3-Clause
// copyright-holders:R. Belmont
/******************************************************************************

    Sega Beena

    apbeena.cpp

    Skeleton driver for the Sega Advanced Pico BEENA

    H/W is custom Sega SoC with ARM7TDMI core at 81 MHz.

    TODO:
            Everything!
            Needs the internal BIOS dumped.
            Component list / PCB diagram

    cartridge ROM has 'edinburgh' in the header, maybe a system codename?
    ROM is also full of OGG files containing the string 'Encoded with Speex speex-1.0.4'
    as well as .mid files for music

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

#include "emu.h"

#include "bus/generic/slot.h"
#include "bus/generic/carts.h"
#include "cpu/arm7/arm7.h"

#include "softlist.h"
#include "speaker.h"
#include "screen.h"


class sega_beena_state : public driver_device
{
public:
	sega_beena_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag)
		, m_maincpu(*this, "arm7")
		, m_cart(*this, "cartslot")
		, m_cart_region(nullptr)
		, m_bank(*this, "cartbank")
	{ }

	void sega_beena(machine_config &config);

private:
	virtual void machine_start() override;
	virtual void machine_reset() override;

	uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);

	DECLARE_DEVICE_IMAGE_LOAD_MEMBER(cart);

	void beena_arm7_map(address_map &map);

	required_device<arm7_cpu_device> m_maincpu;
	optional_device<generic_slot_device> m_cart;
	memory_region *m_cart_region;
	optional_memory_bank m_bank;
};

void sega_beena_state::beena_arm7_map(address_map &map)
{
	if (m_cart && m_cart->exists())
	{
		map(0x00000000, 0x000001ff).rom().bankr("cartbank");
		map(0x80000000, 0x807fffff).rom().bankr("cartbank");
	}
}

void sega_beena_state::machine_start()
{
	// if there's a cart, override the standard mapping
	if (m_cart && m_cart->exists())
	{
		std::string region_tag;
		m_cart_region = memregion(region_tag.assign(m_cart->tag()).append(GENERIC_ROM_REGION_TAG).c_str());

		m_bank->configure_entries(0, (m_cart_region->bytes() + 0x7fffff) / 0x800000, m_cart_region->base(), 0x800000);
		m_bank->set_entry(0);
	}
}

void sega_beena_state::machine_reset()
{
}

DEVICE_IMAGE_LOAD_MEMBER(sega_beena_state, cart)
{
	uint32_t size = m_cart->common_get_size("rom");

	m_cart->rom_alloc(size, GENERIC_ROM16_WIDTH, ENDIANNESS_LITTLE);
	m_cart->common_load_rom(m_cart->get_rom_base(), size, "rom");


	return image_init_result::PASS;
}

static INPUT_PORTS_START( sega_beena )
INPUT_PORTS_END


uint32_t sega_beena_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
	return 0;
}

void sega_beena_state::sega_beena(machine_config &config)
{
	ARM7_BE(config, m_maincpu, 81'000'000);
	m_maincpu->set_addrmap(AS_PROGRAM, &sega_beena_state::beena_arm7_map);

	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
	screen.set_refresh_hz(60);
	screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
	screen.set_size(640, 480);
	screen.set_visarea(0, 640-1, 0, 480-1);
	screen.set_screen_update(FUNC(sega_beena_state::screen_update));

	SPEAKER(config, "lspeaker").front_left();
	SPEAKER(config, "rspeaker").front_right();

	GENERIC_CARTSLOT(config, m_cart, generic_plain_slot, "sega_beena_cart");
	m_cart->set_width(GENERIC_ROM16_WIDTH);
	m_cart->set_device_load(device_image_load_delegate(&sega_beena_state::device_image_load_cart, this));
	m_cart->set_must_be_loaded(true);

	SOFTWARE_LIST(config, "cart_list").set_original("sega_beena_cart");
}

ROM_START( beena )
	ROM_REGION32_BE( 0x80000, "bios", 0 )   // SoC internal BIOS
	ROM_LOAD16_WORD_SWAP( "beenabios.bin", 0x000000, 0x080000, NO_DUMP )
ROM_END


//    year, name,         parent,  compat, machine,      input,        class,              init,       company,  fullname,                             flags
CONS( 2009, beena,      0,       0,      sega_beena, sega_beena, sega_beena_state, empty_init, "Sega", "Advanced Pico BEENA", MACHINE_IS_SKELETON )