/* Sega MegaTech */
/*

  changelog:

  22 Sept 2007 - Started updating this to use the new Megadrive code,
                 The Megadrive games currently run with the new code
                  but the SMS based games still aren't hooked up (they
                  use the Megadrive Z80 as the main CPU, and the VDP
                  in compatibility mode)

                 Controls for the menu haven't been hooked back up
                 and the games run without any menu interaction at the
                 moment.




todo: cleanup, fix so that everything works properly
      games are marked as NOT WORKING due to
      a) incorrect behavior at time out
      b) they're sms based games which aren't yet fully supported


About MegaTech:

Megatech games are identical to their Genesis/SMS equivlents, however the Megatech cartridges contain
a BIOS rom with the game instructions.  The last part number of the bios ROM is the cart/game ID code.

In Megatech games your coins buy you time to play the game, how you perform in the game does not
matter, you can die and start a new game providing you still have time, likewise you can be playing
well and run out of time if you fail to insert more coins.  This is the same method Nintendo used
with their Playchoice 10 system.

The BIOS screen is based around SMS hardware, with an additional Z80 and SMS VDP chip not present on
a standard Genesis.

SMS games run on Megatech in the Genesis's SMS compatability mode, where the Genesis Z80 becomes the
main CPU and the Genesis VDP acts in a mode mimicing the behavior of the SMS VDP.

Additions will only be made to this driver if proof that the dumped set are original roms with original
Sega part numbers is given..

A fairly significant number of Genesis games were available for this system.


Sega Mega Tech Cartridges (Readme by Guru)
-------------------------

These are cart-based games for use with Sega Mega Tech hardware. There are 6 known types of carts. All carts
are very simple, almost exactly the same as Mega Play carts. They contain just 2 or 3 ROMs.
PCB 171-6215A has locations for 2 ROMs and is dated 1991. PCB 171-6215A is also used in Mega Play!
PCB 171-5782 has locations for 2 ROMs and is dated 1989.
PCB 171-5869A has locations for 3 ROMs and is dated 1989.
PCB 171-5834 has locations for 3 ROMs and is dated 1989.
PCB 171-5783 has locations for 2 ROMs and is dated 1989.
PCB 171-5784 has locations for 2 ROMs and is dated 1989. It also contains a custom Sega IC 315-5235

                                                                         |------------------------------- ROMs -----------------------------|
                                                                         |                                                                  |
Game                    PCB #       Sticker on PCB    Sticker on cart      IC1                    IC2                    IC3
---------------------------------------------------------------------------------------------------------------------------------------------
Space Harrier II        171-5782    837-6963-02       610-0239-02          MPR-11934    (834200)  EPR-12368-02 (27256)   n/a
Out Run                 171-5783    837-6963-06       610-0239-06          MPR-11078    (Mask)    EPR-12368-06 (27256)   n/a
Alien Syndrome          171-5783    837-6963-07       610-0239-07          MPR-11194    (232011)  EPR-12368-07 (27256)   n/a
Afterburner             171-5784    837-6963-10       610-0239-10          315-5235     (custom)  MPR-11271-T  (834000)  EPR-12368-10 (27256)
Tetris                  171-5834    837-6963-22       610-0239-22          MPR-12356F   (831000)  MPR-12357F   (831000)  EPR-12368-22 (27256)
Ghouls & Ghosts         171-5869A   -                 610-0239-23          MPR-12605    (40 pins) MPR-12606    (40 pins) EPR-12368-23 (27256)
Super Hang On           171-5782    837-6963-24       610-0239-24          MPR-12640    (234000)  EPR-12368-24 (27256)   n/a
Forgotten Worlds        171-5782    837-6963-26       610-0239-26          MPR-12672-H  (Mask)    EPR-12368-26 (27256)   n/a
Arnold Palmer Tour Golf 171-5782    837-6963-31       610-0239-31          MPR-12645F   (23C4000) EPR-12368-31 (27256)   n/a
Super Real Basket Ball  171-5782    837-6963-32       610-0239-32          MPR-12904F   (838200A) EPR-12368-32 (27256)   n/a
Wrestle War             171-5782    837-6963-48       610-0239-48          MPR-14025-F  (23C4000) EPR-12368-48 (27256)   n/a
Bonanza Bros.           171-5782    837-6963-49       610-0239-49          MPR-13905A-F (23C4000) EPR-12368-49 (27256)   n/a
Mario Lemeux Hockey     171-5782    837-6963-59       610-0239-59          MPR-14376-H  (234000)  EPR-12368-59 (27256)   n/a
Sonic Hedgehog 2        171-6215A   837-6963-62       610-0239-62          MPR-15000A-F (838200)  EPR-12368-62 (27256)   n/a


*/
#include "driver.h"
#include "genesis.h"
#include "rendlay.h"
#include "megadriv.h"
#include "segae.h"

/* Megatech BIOS specific */
static UINT32 bios_port_ctrl;
static UINT8* megatech_banked_ram;
static int current_game_is_sms; // is the current game SMS based (running on genesis z80, in VDP compatibility mode)
UINT32 bios_ctrl_inputs;

#define MASTER_CLOCK		53693100

/* give us access to the megadriv start and update functions so that we can call them */
extern UINT32 video_update_megadriv(running_machine *machine, int screen, mame_bitmap *bitmap, const rectangle *cliprect);
extern void video_start_megadriv(running_machine *machine);
extern void video_eof_megadriv(running_machine *machine);
extern void machine_reset_megadriv(running_machine *machine);

/* in drivers/segae.c */
extern UINT32 video_update_megatech_bios(running_machine *machine, int screen, mame_bitmap *bitmap, const rectangle *cliprect);
extern void video_eof_megatech_bios(running_machine *machine);
extern void machine_reset_megatech_bios(running_machine *machine);
extern void driver_init_megatech_bios(running_machine *machine);


/* not currently used */
static INPUT_PORTS_START( megatech ) /* Genesis Input Ports */
	PORT_INCLUDE(megadriv)

	PORT_START_TAG("BIOS_IN0") // port 6
    PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_SERVICE2 ) PORT_NAME("Select") PORT_CODE(KEYCODE_0)
    PORT_DIPNAME( 0x0002, 0x0002, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0002, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0004, 0x0004, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0004, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0008, 0x0008, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0008, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0010, 0x0010, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0010, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0020, 0x0020, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0020, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0040, 0x0040, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0040, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_SERVICE ) PORT_NAME("Test mode") PORT_CODE(KEYCODE_F2)

	PORT_START_TAG("BIOS_IN1") // port 6
	PORT_BIT(  0x01, IP_ACTIVE_LOW, IPT_COIN1 )  // a few coin inputs here
	PORT_BIT(  0x02, IP_ACTIVE_LOW, IPT_COIN2 )
	PORT_BIT(  0x04, IP_ACTIVE_LOW, IPT_COIN3 )
	PORT_BIT(  0x08, IP_ACTIVE_LOW, IPT_COIN4 )
	PORT_BIT(  0x10, IP_ACTIVE_LOW, IPT_SERVICE1 ) PORT_NAME("Service coin") PORT_CODE(KEYCODE_9)
	PORT_BIT(  0x20, IP_ACTIVE_LOW, IPT_SERVICE3 ) PORT_NAME("Enter") PORT_CODE(KEYCODE_MINUS)
	PORT_BIT(  0x40, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT(  0x80, IP_ACTIVE_LOW, IPT_START2 )

	PORT_START_TAG("BIOS_DSW0")
	PORT_DIPNAME( 0x02, 0x02, "Coin slot 3" )
	PORT_DIPSETTING (   0x00, "Inhibit" )
	PORT_DIPSETTING (   0x02, "Accept" )
	PORT_DIPNAME( 0x01, 0x01, "Coin slot 4" )
	PORT_DIPSETTING (   0x00, "Inhibit" )
	PORT_DIPSETTING (   0x01, "Accept" )
	PORT_DIPNAME( 0x1c, 0x1c, "Coin slot 3/4 value" )
	PORT_DIPSETTING(    0x1c, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x14, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_6C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_8C ) )
	PORT_DIPSETTING(    0x00, "1 Coin/10 credits" )
	PORT_DIPNAME( 0xe0, 0x60, "Coin slot 2 value" )
	PORT_DIPSETTING(    0x20, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0xa0, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0xe0, DEF_STR( 1C_6C ) )
	PORT_DIPSETTING(    0x00, "Inhibit" )

	PORT_START_TAG("BIOS_DSW1")
	PORT_DIPNAME( 0x0f, 0x01, "Coin Slot 1 value" )
	PORT_DIPSETTING(    0x00, "Inhibit" )
	PORT_DIPSETTING(    0x01, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x03, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x05, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 1C_6C ) )
	PORT_DIPSETTING(    0x07, DEF_STR( 1C_7C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_8C ) )
	PORT_DIPSETTING(    0x09, DEF_STR( 1C_9C ) )
	PORT_DIPSETTING(    0x0a, "1 coin/10 credits" )
	PORT_DIPSETTING(    0x0b, "1 coin/11 credits" )
	PORT_DIPSETTING(    0x0c, "1 coin/12 credits" )
	PORT_DIPSETTING(    0x0d, "1 coin/13 credits" )
	PORT_DIPSETTING(    0x0e, "1 coin/14 credits" )
	PORT_DIPSETTING(    0x0f, "1 coin/15 credits" )
	PORT_DIPNAME( 0xf0, 0xa0, "Time per credit" )
	PORT_DIPSETTING(    0x00, DEF_STR( Free_Play ) )
	PORT_DIPSETTING(    0x10, "7:30" )
	PORT_DIPSETTING(    0x20, "7:00" )
	PORT_DIPSETTING(    0x30, "6:30" )
	PORT_DIPSETTING(    0x40, "6:00" )
	PORT_DIPSETTING(    0x50, "5:30" )
	PORT_DIPSETTING(    0x60, "5:00" )
	PORT_DIPSETTING(    0x70, "4:30" )
	PORT_DIPSETTING(    0x80, "4:00" )
	PORT_DIPSETTING(    0x90, "3:30" )
	PORT_DIPSETTING(    0xa0, "3:00" )
	PORT_DIPSETTING(    0xb0, "2:30" )
	PORT_DIPSETTING(    0xc0, "2:00" )
	PORT_DIPSETTING(    0xd0, "1:30" )
	PORT_DIPSETTING(    0xe0, "1:00" )
	PORT_DIPSETTING(    0xf0, "0:30" )


	PORT_START_TAG("BIOS_J1")
    PORT_DIPNAME( 0x0001, 0x0001, "5" )
    PORT_DIPSETTING(      0x0001, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0002, 0x0002, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0002, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0004, 0x0004, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0004, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0008, 0x0008, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0008, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0010, 0x0010, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0010, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0020, 0x0020, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0020, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0040, 0x0040, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0040, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
    PORT_DIPNAME( 0x0080, 0x0080, DEF_STR( Unknown ) )
    PORT_DIPSETTING(      0x0080, DEF_STR( Off ) )
    PORT_DIPSETTING(      0x0000, DEF_STR( On ) )

INPUT_PORTS_END

/* MEGATECH specific */

static UINT8 mt_cart_select_reg;

static READ8_HANDLER( megatech_instr_r )
{
	UINT8* instr = memory_region(REGION_CPU3)+0x8000;

	return instr[offset/2];
//  else
//      return 0xff;
}

static READ8_HANDLER( megatech_cart_select_r )
{
	return (mt_cart_select_reg);
}

static READ8_HANDLER( z80_unmapped_port_r )
{
	printf("unmapped z80 port read %04x\n",offset);
	return 0;
}

static WRITE8_HANDLER( z80_unmapped_port_w )
{
	printf("unmapped z80 port write %04x\n",offset);
}

static READ8_HANDLER( z80_unmapped_r )
{
	printf("unmapped z80 read %04x\n",offset);
	return 0;
}

static WRITE8_HANDLER( z80_unmapped_w )
{
	printf("unmapped z80 write %04x\n",offset);
}

static UINT8* sms_mainram;
static UINT8* sms_rom;


static WRITE8_HANDLER( mt_sms_standard_rom_bank_w )
{
	int bank = data&0x1f;
	//logerror("bank w %02x %02x\n", offset, data);

	sms_mainram[0x1ffc+offset] = data;
	switch (offset)
	{
		case 0:
			logerror("bank w %02x %02x\n", offset, data);
			memory_install_read8_handler (1, ADDRESS_SPACE_PROGRAM, 0x0000, 0xbfff, 0, 0, MRA8_BANK5);
			memory_install_write8_handler(1, ADDRESS_SPACE_PROGRAM, 0x0000, 0xbfff, 0, 0, MWA8_ROM);

			//printf("bank ram??\n");
			break;
		case 1:
			memcpy(sms_rom+0x0000, memory_region(REGION_CPU1)+bank*0x4000, 0x4000);
			break;
		case 2:
			memcpy(sms_rom+0x4000, memory_region(REGION_CPU1)+bank*0x4000, 0x4000);
			break;
		case 3:
			memcpy(sms_rom+0x8000, memory_region(REGION_CPU1)+bank*0x4000, 0x4000);
			break;

	}
}

#ifdef UNUSED_FUNCTION
READ8_HANDLER( md_sms_ioport_dc_r )
{
	return 0xff;//mame_rand(Machine);
}

READ8_HANDLER( md_sms_ioport_dd_r )
{
	return 0xff;//mame_rand(Machine);
}
#endif



static void megatech_set_genz80_as_sms_standard_ports(void)
{
	/* INIT THE PORTS *********************************************************************************************/
	memory_install_read8_handler (1, ADDRESS_SPACE_IO, 0x0000, 0xffff, 0, 0, z80_unmapped_port_r);
	memory_install_write8_handler(1, ADDRESS_SPACE_IO, 0x0000, 0xffff, 0, 0, z80_unmapped_port_w);

	memory_install_read8_handler (1, ADDRESS_SPACE_IO, 0x7e, 0x7e, 0, 0, md_sms_vdp_vcounter_r);
	memory_install_write8_handler(1, ADDRESS_SPACE_IO, 0x7e, 0x7e, 0, 0, sms_sn76496_w);

	memory_install_write8_handler(1, ADDRESS_SPACE_IO, 0x7f, 0x7f, 0, 0, sms_sn76496_w);

	memory_install_read8_handler (1, ADDRESS_SPACE_IO, 0xbe, 0xbe, 0, 0, md_sms_vdp_data_r);
	memory_install_write8_handler(1, ADDRESS_SPACE_IO, 0xbe, 0xbe, 0, 0, md_sms_vdp_data_w);

	memory_install_read8_handler (1, ADDRESS_SPACE_IO, 0xbf, 0xbf, 0, 0, md_sms_vdp_ctrl_r);
	memory_install_write8_handler(1, ADDRESS_SPACE_IO, 0xbf, 0xbf, 0, 0, md_sms_vdp_ctrl_w);

	memory_install_read8_handler (1, ADDRESS_SPACE_IO, 0x10, 0x10, 0, 0, megatech_sms_ioport_dd_r); // super tetris

	memory_install_read8_handler (1, ADDRESS_SPACE_IO, 0xdc, 0xdc, 0, 0, megatech_sms_ioport_dc_r);
	memory_install_read8_handler (1, ADDRESS_SPACE_IO, 0xdd, 0xdd, 0, 0, megatech_sms_ioport_dd_r);
	memory_install_read8_handler (1, ADDRESS_SPACE_IO, 0xde, 0xde, 0, 0, megatech_sms_ioport_dd_r);
	memory_install_read8_handler (1, ADDRESS_SPACE_IO, 0xdf, 0xdf, 0, 0, megatech_sms_ioport_dd_r); // adams family
}

static void megatech_set_genz80_as_sms_standard_map(void)
{
	/* INIT THE MEMMAP / BANKING *********************************************************************************/

	/* catch any addresses that don't get mapped */
	memory_install_read8_handler (1, ADDRESS_SPACE_PROGRAM, 0x0000, 0xffff, 0, 0, z80_unmapped_r);
	memory_install_write8_handler(1, ADDRESS_SPACE_PROGRAM, 0x0000, 0xffff, 0, 0, z80_unmapped_w);

	/* fixed rom bank area */
	sms_rom = auto_malloc(0x400000);
	memory_install_read8_handler (1, ADDRESS_SPACE_PROGRAM, 0x0000, 0xbfff, 0, 0, MRA8_BANK5);
	memory_install_write8_handler(1, ADDRESS_SPACE_PROGRAM, 0x0000, 0xbfff, 0, 0, MWA8_ROM);
	memory_set_bankptr( 5, sms_rom );

	memcpy(sms_rom, memory_region(REGION_CPU1), 0x400000);

	/* main ram area */
	sms_mainram = auto_malloc(0x2000); // 8kb of main ram
	memory_install_read8_handler (1, ADDRESS_SPACE_PROGRAM, 0xc000, 0xdfff, 0, 0, MRA8_BANK6);
	memory_install_write8_handler(1, ADDRESS_SPACE_PROGRAM, 0xc000, 0xdfff, 0, 0, MWA8_BANK6);
	memory_set_bankptr( 6, sms_mainram );
	memory_install_read8_handler (1, ADDRESS_SPACE_PROGRAM, 0xe000, 0xffff, 0, 0, MRA8_BANK7);
	memory_install_write8_handler(1, ADDRESS_SPACE_PROGRAM, 0xe000, 0xffff, 0, 0, MWA8_BANK7);
	memory_set_bankptr( 7, sms_mainram );
	memset(sms_mainram,0x00,0x2000);

	memory_install_write8_handler(1, ADDRESS_SPACE_PROGRAM, 0xfffc, 0xffff, 0, 0, mt_sms_standard_rom_bank_w);

	megatech_set_genz80_as_sms_standard_ports();
//  smsgg_backupram = NULL;

}

static void megatech_select_game(int gameno)
{
	UINT8* game_region;
	UINT8* bios_region;

	printf("game 0 selected\n");

	cpunum_set_input_line(0, INPUT_LINE_RESET, ASSERT_LINE);
	cpunum_set_input_line(1, INPUT_LINE_RESET, ASSERT_LINE);
	cpunum_set_input_line(0, INPUT_LINE_HALT, ASSERT_LINE);
	cpunum_set_input_line(1, INPUT_LINE_HALT, ASSERT_LINE);
	sndti_reset(SOUND_YM2612, 0);

	game_region = memory_region(REGION_USER1 + (gameno*2) + 0);
	bios_region = memory_region(REGION_USER1 + (gameno*2) + 1);

	megadriv_stop_scanline_timer();// stop the scanline timer for the genesis vdp... it can be restarted in video eof when needed
	segae_md_sms_stop_scanline_timer();// stop the scanline timer for the sms vdp


	/* if the regions exist we're fine */
	if (game_region && bios_region)
	{
		memcpy(memory_region(REGION_CPU3)+0x8000, bios_region, 0x8000);
		memcpy(memory_region(REGION_CPU1), game_region, 0x300000);

		// I store an extra byte at the end of the instruction rom region when loading
		// to indicate if the current cart is an SMS cart.. the original hardware
		// knows from the cart pinout
		if (bios_region[0x8000]==2)
		{
			printf("SMS cart!!, CPU not running\n");
			current_game_is_sms = 1;
			megatech_set_genz80_as_sms_standard_map();
			cpunum_set_input_line(1, INPUT_LINE_HALT, CLEAR_LINE);
			cpunum_set_input_line(1, INPUT_LINE_RESET, CLEAR_LINE);


		}
		else if (bios_region[0x8000]==1)
		{
			printf("Genesis Cart, CPU0 running\n");
			current_game_is_sms = 0;
			megatech_set_megadrive_z80_as_megadrive_z80();
			cpunum_set_input_line(0, INPUT_LINE_RESET, CLEAR_LINE);
			cpunum_set_input_line(0, INPUT_LINE_HALT, CLEAR_LINE);
		}
		else
		{
			printf("Error in cart loading??? no type specified\n");
		}
	}
	else
	{
		cpunum_set_input_line(0, INPUT_LINE_HALT, ASSERT_LINE);
		cpunum_set_input_line(1, INPUT_LINE_HALT, ASSERT_LINE);
	//  cpunum_set_input_line(0, INPUT_LINE_RESET, ASSERT_LINE);
	//  cpunum_set_input_line(1, INPUT_LINE_RESET, ASSERT_LINE);

		/* no cart.. */
		memset(memory_region(REGION_CPU3)+0x8000, 0x00, 0x8000);
		memset(memory_region(REGION_CPU1), 0x00, 0x300000);
	}

	return;
}

static WRITE8_HANDLER( megatech_cart_select_w )
{
	/* seems to write the slot number..
      but it stores something in (banked?) ram
      because it always seems to show the
      same instructions ... */

//  printf("megatech_instr_w %02x\n",data);

	mt_cart_select_reg = data;


	megatech_select_game(mt_cart_select_reg);

/*
    if (mt_cart_select_reg==2)
    {
        printf("game 2 selected\n");
        memcpy(memory_region(REGION_CPU3)+0x8000, memory_region(REGION_USER2), 0x8000);
    }
//  else if (mt_cart_select_reg==0)
//  {
//      printf("game 0 selected\n");
//      memcpy(memory_region(REGION_CPU3)+0x8000, memory_region(REGION_USER4), 0x8000);
//  }
    else if (mt_cart_select_reg==6)
    {
        printf("game 6 selected\n");
        memcpy(memory_region(REGION_CPU3)+0x8000, memory_region(REGION_USER6), 0x8000);
    }
    else
    {
        memset(memory_region(REGION_CPU3)+0x8000, 0x00, 0x8000);
    }
*/

}


static READ8_HANDLER( bios_ctrl_r )
{

	if(offset == 0)
		return 0;
	if(offset == 2)
		return bios_ctrl[offset] & 0xfe;

	return bios_ctrl[offset];
}

static WRITE8_HANDLER( bios_ctrl_w )
{
	if(offset == 1)
	{
		bios_ctrl_inputs = data & 0x04;  // Genesis/SMS input ports disable bit
	}
	bios_ctrl[offset] = data;
}


static READ8_HANDLER( megaplay_r0) { return readinputportbytag("BIOS_IN0") ; }
static READ8_HANDLER( megaplay_r1) { return readinputportbytag("BIOS_IN1") ; }
static READ8_HANDLER( megaplay_r2) { return readinputportbytag("BIOS_DSW0") ; }
static READ8_HANDLER( megaplay_r3) { return readinputportbytag("BIOS_DSW1") ; }

static int mt_bank_bank_pos = 0;
static int mt_bank_partial = 0;
static int mt_bank_addr = 0;

/* this sets 0x300000 which may indicate that the 68k can see the instruction rom
   there, this limiting the max game rom capacity to 3meg. */
static WRITE8_HANDLER (mt_z80_bank_w)
{
	mt_bank_partial |= (data & 0x01)<<23; // add new bit to partial address
	mt_bank_bank_pos++;

	if (mt_bank_bank_pos<9)
	{
		mt_bank_partial >>= 1;
	}
	else
	{
		mt_bank_bank_pos = 0;
		mt_bank_addr = mt_bank_partial;
		mt_bank_partial = 0;
		printf("MT z80 bank set to %08x\n",mt_bank_addr);

	}
}

static READ8_HANDLER( megatech_banked_ram_r )
{
	return megatech_banked_ram[offset + 0x1000 * (mt_cart_select_reg&0x7) ];
}

static WRITE8_HANDLER( megatech_banked_ram_w )
{
	megatech_banked_ram[offset + 0x1000 * (mt_cart_select_reg&0x7) ] = data;
}



static ADDRESS_MAP_START( megatech_bios_map, ADDRESS_SPACE_PROGRAM, 8 )
 	AM_RANGE(0x0000, 0x2fff) AM_ROM // from bios rom (0x0000-0x2fff populated in ROM)
 	AM_RANGE(0x3000, 0x3fff) AM_READWRITE(megatech_banked_ram_r, megatech_banked_ram_w) // copies instruction data here at startup, must be banked
	AM_RANGE(0x4000, 0x5fff) AM_RAM // plain ram?
	AM_RANGE(0x6000, 0x6000) AM_WRITE( mt_z80_bank_w )
	AM_RANGE(0x6400, 0x6400) AM_READ(megaplay_r2)
	AM_RANGE(0x6401, 0x6401) AM_READ(megaplay_r3)
	AM_RANGE(0x6404, 0x6404) AM_READWRITE(megatech_cart_select_r, megatech_cart_select_w) // cart select & ram bank
	AM_RANGE(0x6800, 0x6800) AM_READ(megaplay_r0)
	AM_RANGE(0x6801, 0x6801) AM_READ(megaplay_r1)
	AM_RANGE(0x6802, 0x6807) AM_READWRITE(bios_ctrl_r, bios_ctrl_w)
//  AM_RANGE(0x6805, 0x6805) AM_READ(input_port_8_r)
 	AM_RANGE(0x7000, 0x77ff) AM_ROM // from bios rom (0x7000-0x77ff populated in ROM)
	//AM_RANGE(0x7800, 0x7fff) AM_RAM // ?
	AM_RANGE(0x8000, 0x9fff) AM_READ(megatech_instr_r) // window into 68k address space, reads instr rom and writes to reset banks on z80 carts?
ADDRESS_MAP_END


static WRITE8_HANDLER (megatech_bios_port_ctrl_w)
{
	bios_port_ctrl = data;
}

static READ8_HANDLER (megatech_bios_joypad_r)
{
	return megatech_bios_port_cc_dc_r(offset,bios_port_ctrl);
}



static WRITE8_HANDLER (megatech_bios_port_7f_w)
{
//  popmessage("CPU #3: I/O port 0x7F write, data %02x",data);
}



static ADDRESS_MAP_START( megatech_bios_portmap, ADDRESS_SPACE_IO, 8 )
	ADDRESS_MAP_FLAGS( AMEF_ABITS(8) )
	AM_RANGE(0x3f, 0x3f) AM_WRITE(megatech_bios_port_ctrl_w)

	AM_RANGE(0x7f, 0x7f) AM_READWRITE(sms_vcounter_r, megatech_bios_port_7f_w)
	AM_RANGE(0xbe, 0xbe) AM_READWRITE(sms_vdp_data_r, sms_vdp_data_w)
	AM_RANGE(0xbf, 0xbf) AM_READWRITE(sms_vdp_ctrl_r, sms_vdp_ctrl_w)

	AM_RANGE(0xdc, 0xdd) AM_READ(megatech_bios_joypad_r)  // player inputs
ADDRESS_MAP_END



static DRIVER_INIT(mtnew)
{
	megatech_banked_ram = auto_malloc(0x1000*8);
	driver_init_megadriv(Machine);
	driver_init_megatech_bios(Machine);
}

static VIDEO_START(mtnew)
{
	init_for_megadrive(); // create an sms vdp too, for comptibility mode
	video_start_megadriv(Machine);
}
//attotime_never
static VIDEO_UPDATE(mtnew)
{
	if (screen ==0)
	{
		/* if we're running an sms game then use the SMS update.. maybe this should be moved to the megadrive emulation core as compatibility mode is a feature of the chip */
		if (!current_game_is_sms) video_update_megadriv(machine,0,bitmap,cliprect);
		else video_update_megatech_md_sms(machine,0,bitmap,cliprect);
	}
	else if (screen ==1) video_update_megatech_bios(machine, 1, bitmap,cliprect);
	return 0;
}

static VIDEO_EOF(mtnew)
{
	if (!current_game_is_sms) video_eof_megadriv(Machine);
	else video_eof_megatech_md_sms(Machine);
	video_eof_megatech_bios(Machine);
}

static MACHINE_RESET(mtnew)
{
	machine_reset_megadriv(Machine);
	machine_reset_megatech_bios(Machine);
	machine_reset_megatech_md_sms(Machine);
	megatech_select_game(0);
}

static MACHINE_DRIVER_START( megatech )

	/* basic machine hardware */
	MDRV_IMPORT_FROM(megadriv)

	/* Megatech has an extra SMS based bios *and* an additional screen */
	MDRV_CPU_ADD_TAG("megatech_bios", Z80, MASTER_CLOCK / 15) /* ?? */
	MDRV_CPU_PROGRAM_MAP(megatech_bios_map, 0)
	MDRV_CPU_IO_MAP(megatech_bios_portmap,0)

	MDRV_MACHINE_RESET(mtnew)

	MDRV_VIDEO_START(mtnew)
	MDRV_VIDEO_UPDATE(mtnew)
	MDRV_VIDEO_EOF(mtnew)

	MDRV_DEFAULT_LAYOUT(layout_dualhovu)

	MDRV_SCREEN_ADD("menu", 0x000)
	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_RGB15)
	MDRV_SCREEN_REFRESH_RATE(60)
	MDRV_SCREEN_SIZE(342,262)
	MDRV_SCREEN_VISIBLE_AREA(0, 256-1, 0, 224-1)

	/* sound hardware */
	MDRV_SOUND_ADD(SN76496, MASTER_CLOCK/15)
	MDRV_SOUND_ROUTE(0, "left", 0.50)
	MDRV_SOUND_ROUTE(1, "right", 0.50)
MACHINE_DRIVER_END


/* MegaTech Games - Genesis & sms! Games with a timer */

/* 12368-xx  xx is the game number? if so there are a _lot_ of carts, mt_beast is 01, mt_sonic is 52! */


/* add a single extra byte after the instruction rom as an indicator to if the cart is SMS or GENESIS,
   the real hardware knows from the pinout */
#define MEGATECH_GAME_IS_GEN 1
#define MEGATECH_GAME_IS_SMS 2

#define MEGATECH_INSTRUCTION_REGION(INSTRUCTION_REGION,FLAG)\
	ROM_REGION( 0x8002, INSTRUCTION_REGION, 0 ) \
	ROM_FILL(0x8000, 2, FLAG) \

#define MEGATECH_BIOS \
	ROM_REGION( 0x400000, REGION_CPU1, ROMREGION_ERASEFF ) \
	ROM_REGION( 0x10000, REGION_CPU3, 0 ) \
	ROM_LOAD( "epr12664.20", 0x000000, 0x8000, CRC(f71e9526) SHA1(1c7887541d02c41426992d17f8e3db9e03975953) ) \

/* no games */
ROM_START( megatech )
	MEGATECH_BIOS
ROM_END


/* Game 01 - Altered Beast (Genesis) */
#define MEGATECH_GAME01(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp12538.ic1", 0x000000, 0x080000, CRC(3bea3dce) SHA1(ec72e4fde191dedeb3f148f132603ed3c23f0f86) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
    ROM_LOAD( "12368-01.ic2", 0x000000, 0x08000, CRC(40cb0088) SHA1(e1711532c29f395a35a1cb34d789015881b5a1ed) ) \

ROM_START( mt_beast )
	MEGATECH_BIOS
	MEGATECH_GAME01(REGION_USER1, REGION_USER2)
ROM_END

/* Game 06 - Out Run (SMS) */

#define MEGATECH_GAME06(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD( "mpr-11078.ic1", 0x000000, 0x040000, CRC(5589d8d2) SHA1(4f9b61b24f0d9fee0448cdbbe8fc05411dbb1102) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_SMS ) \
	ROM_LOAD( "epr-12368-06.ic2", 0x000000, 0x08000, CRC(c7c74429) SHA1(22ee261a653e10d66e0d6703c988bb7f236a7571) ) \


ROM_START( mt_orun ) /* Outrun */
	MEGATECH_BIOS
	MEGATECH_GAME06(REGION_USER1, REGION_USER2)
ROM_END

/* Game 13 - Astro Warrior (SMS) */
#define MEGATECH_GAME13(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD( "ep13817.ic2", 0x000000, 0x20000, CRC(299cbb74) SHA1(901697a3535ad70190647f34ad5b30b695d54542) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_SMS ) \
	ROM_LOAD( "12368-13.ic1", 0x000000, 0x08000,  CRC(4038cbd1) SHA1(696bc1efce45d9f0052b2cf0332a232687c8d6ab) ) \

ROM_START( mt_astro )
	MEGATECH_BIOS
	MEGATECH_GAME13(REGION_USER1, REGION_USER2)
ROM_END

/* Game 21 - World Cup Soccer (Genesis) */
#define MEGATECH_GAME21(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp12607b.ic1", 0x000000, 0x080000, CRC(bc591b30) SHA1(55e8577171c0933eee53af1dabd0f4c6462d5fc8) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-21.ic2", 0x000000, 0x08000, CRC(028ee46b) SHA1(cd8f81d66e5ae62107eb20e0ca5db4b66d4b2987) ) \

ROM_START( mt_wcsoc )
	MEGATECH_BIOS
	MEGATECH_GAME21(REGION_USER1, REGION_USER2)
ROM_END

/* Game 23 - Ghouls and Ghosts (Genesis) */
#define MEGATECH_GAME23(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp12605.ic1", 0x000000, 0x020000, CRC(1066C6AB) SHA1(C30E4442732BDB38C96D780542F8550A94D127B0) ) \
	ROM_LOAD16_WORD_SWAP( "mpr12606.ic2", 0x080000, 0x020000, CRC(D0BE7777) SHA1(A44B2A3D427F6973B5C1A3DCD8D1776366ACB9F7) ) \
	ROM_CONTINUE(0x020000,0x60000) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-23.ic3", 0x000000, 0x08000, CRC(7ee58546) SHA1(ad5bb0934475eacdc5e354f67c96fe0d2512d33b) ) \

ROM_START( mt_gng )
	MEGATECH_BIOS
	MEGATECH_GAME23(REGION_USER1, REGION_USER2)
ROM_END

/* Game 24 - Super Hang On (Genesis) */

#define MEGATECH_GAME24(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mpr-12640.ic1", 0x000000, 0x080000, CRC(2fe2cf62) SHA1(4728bcc847deb38b16338cbd0154837cd4a07b7d) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "epr-12368-24.ic2", 0x000000, 0x08000, CRC(6c2db7e3) SHA1(8de0a10ed9185c9e98f17784811a79d3ce8c4c03) ) \

ROM_START( mt_shang ) /* Super HangOn */
	MEGATECH_BIOS
	MEGATECH_GAME24(REGION_USER1, REGION_USER2)
ROM_END

/* Game 25 - Golden Axe (Genesis) */

#define MEGATECH_GAME25(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "12806.ic1", 0x000000, 0x080000, CRC(43456820) SHA1(2f7f1fcd979969ac99426f11ab99999a5494a121) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-25.ic2", 0x000000, 0x08000, CRC(1f07ed28) SHA1(9d54192f4c6c1f8a51c38a835c1dd1e4e3e8279e) ) \

ROM_START( mt_gaxe )
	MEGATECH_BIOS
	MEGATECH_GAME25(REGION_USER1, REGION_USER2)
ROM_END

/* Game 39 - Super Monaco Grand Prix (Genesis) */

#define MEGATECH_GAME39(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "13250.ic1", 0x000000, 0x080000, CRC(189b885f) SHA1(31c06ffcb48b1604989a94e584261457de4f1f46) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-39.ic2", 0x000000, 0x08000, CRC(64b3ce25) SHA1(83a9f2432d146a712b037f96f261742f7dc810bb) ) \

ROM_START( mt_smgp ) /* Super Monaco Grand Prix */
	MEGATECH_BIOS
	MEGATECH_GAME39(REGION_USER1, REGION_USER2)
ROM_END

/* Game 52 - Sonic (Genesis) */
#define MEGATECH_GAME52(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp13913.ic1", 0x000000, 0x080000, CRC(480b4b5c) SHA1(ab1dc1f738e3b2d0898a314b123fa71182bf572e) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-52.ic2", 0x0000, 0x8000,  CRC(6a69d20c) SHA1(e483b39ff6eca37dc192dc296d004049e220554a) ) \

ROM_START( mt_sonic )
	MEGATECH_BIOS
	MEGATECH_GAME52(REGION_USER1, REGION_USER2)
ROM_END

#define MEGATECH_GAME52ALT(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp13933.ic1", 0x000000, 0x080000, CRC(13775004) SHA1(5decfd35944a2d0e7b996b9a4a12b616a309fd5e) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-52.ic2", 0x0000, 0x8000,  CRC(6a69d20c) SHA1(e483b39ff6eca37dc192dc296d004049e220554a) ) \

ROM_START( mt_sonia ) /* Sonic  (alt)*/
	MEGATECH_BIOS
	MEGATECH_GAME52ALT(REGION_USER1, REGION_USER2)
ROM_END

/* Game 57 - Golden Axe 2 (Genesis) */
#define MEGATECH_GAME57(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp14272.ic1", 0x000000, 0x080000, CRC(d4784cae) SHA1(b6c286027d06fd850016a2a1ee1f1aeea080c3bb) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-57.ic2", 0x000000, 0x08000, CRC(dc9b4433) SHA1(efd3a598569010cdc4bf38ecbf9ed1b4e14ffe36) ) \

ROM_START( mt_gaxe2 ) /* Golden Axe 2 */
	MEGATECH_BIOS
	MEGATECH_GAME57(REGION_USER1, REGION_USER2)
ROM_END

/* Game 58 - Sports Talk Football */
#define MEGATECH_GAME58(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp14356a-f.ic1", 0x000000, 0x100000, CRC(20cf32f6) SHA1(752314346a7a98b3808b3814609e024dc0a4108c) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "ep12368-58.ic2", 0x000000, 0x08000, CRC(dce2708e) SHA1(fcebb1899ee11468f6bda705899f074e7de9d723) ) \

ROM_START( mt_stf ) /* Sports Talk Football */
	MEGATECH_BIOS
	MEGATECH_GAME58(REGION_USER1, REGION_USER2)
ROM_END

/* Game 53 - Fire Shark */
#define MEGATECH_GAME53(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp14341.ic1", 0x000000, 0x080000, CRC(04d65ebc) SHA1(24338aecdc52b6f416548be722ca475c83dbae96) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-53.ic2", 0x000000, 0x08000,  CRC(4fa61044) SHA1(7810deea221c10b0b2f5233443d81f4f1998ee58) ) \

	/* alt version with these roms exists, but the content is the same */
	/* (6a221fd6) ep14706.ic1             mp14341.ic1  [even]     IDENTICAL */
	/* (09fa48af) ep14707.ic2             mp14341.ic1  [odd]      IDENTICAL */

ROM_START( mt_fshrk ) /* Fire Shark */
	MEGATECH_BIOS
	MEGATECH_GAME53(REGION_USER1, REGION_USER2)
ROM_END

/* Game 38 - E-Swat */
#define MEGATECH_GAME38(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp13192-h.ic1", 0x000000, 0x080000, CRC(82f458ef) SHA1(58444b783312def71ecffc4ad021b72a609685cb) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-38.ic2", 0x000000, 0x08000, CRC(43c5529b) SHA1(104f85adea6da1612c0aa96d553efcaa387d7aaf) ) \

ROM_START( mt_eswat ) /* E-Swat */
	MEGATECH_BIOS
	MEGATECH_GAME38(REGION_USER1, REGION_USER2)
ROM_END

/* Game 49 - Bonanza Bros */

#define MEGATECH_GAME49(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp13905a.ic1", 0x000000, 0x100000, CRC(68a88d60) SHA1(2f56e8a2b0999de4fa0d14a1527f4e1df0f9c7a2) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-49.ic2", 0x000000, 0x08000, CRC(c5101da2) SHA1(636f30043e2e9291e193ef9a2ead2e97a0bf7380) ) \

ROM_START( mt_bbros ) /* Bonanza Bros */
	MEGATECH_BIOS
	MEGATECH_GAME49(REGION_USER1, REGION_USER2)
ROM_END

/* Game 48 - Wrestle War */

#define MEGATECH_GAME48(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mpr-14025-f.ic1", 0x000000, 0x080000, CRC(26e899fe) SHA1(6d28e154ae2e4196097a2aa96c5acd5dfe7e3d2b) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-48.ic2", 0x000000, 0x08000, CRC(25817bc2) SHA1(ba1bbb952aff12fb4d3ecfb10d82c54128439395) ) \

ROM_START( mt_wwar ) /* Wrestle War */
	MEGATECH_BIOS
	MEGATECH_GAME48(REGION_USER1, REGION_USER2)
ROM_END

/* Game 62 - Sonic 2 */

#define MEGATECH_GAME62(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp15000a-f.ic1", 0x000000, 0x100000, CRC(679ebb49) SHA1(557482064677702454562f753460993067ef9e16) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "ep12368-62.ic2", 0x000000, 0x08000, CRC(14a8566f) SHA1(d1d14162144bf068ddd19e9736477ff98fb43f9e) ) \


ROM_START( mt_soni2 ) /* Sonic 2 */
	MEGATECH_BIOS
	MEGATECH_GAME62(REGION_USER1, REGION_USER2)
ROM_END

/* Game 59 - Mario Lemieux Hockey */

#define MEGATECH_GAME59(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mpr-14376-h.ic1", 0x000000, 0x80000, CRC(aa9be87e) SHA1(dceed94eaeb30e534f6953a4bc25ff37673b1e6b) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "epr-12368-59.ic2", 0x000000, 0x08000, CRC(6d47b438) SHA1(0a145f6438e4e55c957ae559663c37662b685246) ) \

ROM_START( mt_mlh )
	MEGATECH_BIOS
	MEGATECH_GAME59(REGION_USER1, REGION_USER2)
ROM_END

/* Game 60 - Kid Chameleon */

#define MEGATECH_GAME60(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp14557.ic1", 0x000000, 0x100000, CRC(e1a889a4) SHA1(a2768eacafc47d371e5276f0cce4b12b6041337a) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-60.ic2", 0x000000, 0x08000, CRC(a8e4af18) SHA1(dfa49f6ec4047718f33dba1180f6204dbaff884c) ) \


ROM_START( mt_kcham ) /* Kid Chameleon */
	MEGATECH_BIOS
	MEGATECH_GAME60(REGION_USER1, REGION_USER2)
ROM_END

/* Game 20 - Last Battle */

#define MEGATECH_GAME20(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp12578f.ic1", 0x000000, 0x080000, CRC(531191a0) SHA1(f6bc26e975c01a3e10ab4033e4c5f494627a1e2f) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-20.ic2", 0x000000, 0x08000, CRC(e1a71c91) SHA1(c250da18660d8aea86eb2abace41ba46130dabc8) ) \

ROM_START( mt_lastb ) /* Last Battle */
	MEGATECH_BIOS
	MEGATECH_GAME20(REGION_USER1, REGION_USER2)
ROM_END

/* Game 40 - Moon Walker */

#define MEGATECH_GAME40(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp13285a.ic1", 0x000000, 0x080000, CRC(189516e4) SHA1(2a79e07da2e831832b8d448cae87a833c85e67c9) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-40.ic2", 0x000000, 0x08000, CRC(0482378c) SHA1(734772f3ddb5ff82b76c3514d18a464b2bce8381) ) \


ROM_START( mt_mwalk ) /* Moon Walker */
	MEGATECH_BIOS
	MEGATECH_GAME40(REGION_USER1, REGION_USER2)
ROM_END

/* Game 41 - Crackdown */

#define MEGATECH_GAME41(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp13578a-s.ic1", 0x000000, 0x080000, CRC(23f19893) SHA1(09aca793871e2246af4dc24925bc1eda8ff34446) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "ep12368-41.ic2", 0x000000, 0x08000, CRC(3014acec) SHA1(07953e9ae5c23fc7e7d08993b215f4dfa88aa5d7) ) \


ROM_START( mt_crack )
	MEGATECH_BIOS
	MEGATECH_GAME41(REGION_USER1, REGION_USER2)
ROM_END


/* Game 27 - Mystic Defender */

#define MEGATECH_GAME27(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp12707.1", 0x000000, 0x080000, CRC(4f2c513d) SHA1(f9bb548b3688170fe18bb3f1b5b54182354143cf) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-27.ic2", 0x000000, 0x08000, CRC(caf46f78) SHA1(a9659e86a6a223646338cd8f29c346866e4406c7) ) \

ROM_START( mt_mystd ) /* Mystic Defender */
	MEGATECH_BIOS
	MEGATECH_GAME27(REGION_USER1, REGION_USER2)
ROM_END

/* Game 02 - Space Harrier 2 */

#define MEGATECH_GAME02(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp11934.ic1", 0x000000, 0x080000, CRC(932daa09) SHA1(a2d7a76f3604c6227d43229908bfbd02b0ef5fd9) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-02.ic2", 0x000000, 0x08000, CRC(c129c66c) SHA1(e7c0c97db9df9eb04e2f9ff561b64305219b8f1f) ) \

ROM_START( mt_shar2 ) /* Space Harrier 2 */
	MEGATECH_BIOS
	MEGATECH_GAME02(REGION_USER1, REGION_USER2)
ROM_END

/* Game 03 - Super Thunder Blade */
#define MEGATECH_GAME03(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp11996f.ic1", 0x000000, 0x080000,  CRC(9355c34e) SHA1(26ff91c2921408673c644b0b1c8931d98524bf63) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-03.ic2", 0x000000, 0x08000,  CRC(1ba4ac5d) SHA1(9bde57d70189d159ebdc537a9026001abfd0deae) ) \


ROM_START( mt_stbld ) /* Super Thunder Blade */
	MEGATECH_BIOS
	MEGATECH_GAME03(REGION_USER1, REGION_USER2)
ROM_END

/* Game 22 - Tetris */
#define MEGATECH_GAME22(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_BYTE( "mpr-12356f.ic1", 0x000001, 0x020000, CRC(1e71c1a0) SHA1(44b2312792e49d46d71e0417a7f022e5ffddbbfe) ) \
	ROM_LOAD16_BYTE( "mpr-12357f.ic2", 0x000000, 0x020000, CRC(d52ca49c) SHA1(a9159892eee2c0cf28ebfcfa99f81f80781851c6) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-22.ic3", 0x000000, 0x08000, CRC(1c1b6468) SHA1(568a38f4186167486e39ab4aa2c1ceffd0b81156) ) \

ROM_START( mt_tetri ) /* Tetris */
	MEGATECH_BIOS
	MEGATECH_GAME22(REGION_USER1, REGION_USER2)
ROM_END

/* Game 11 - Thunder Force 2 */

#define MEGATECH_GAME11(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp12559.ic1", 0x000000, 0x080000, CRC(b093bee3) SHA1(0bf6194c3d228425f8cf1903ed70d8da1b027b6a) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-11.ic2", 0x000000, 0x08000, CRC(f4f27e8d) SHA1(ae1a2823deb416c53838115966f1833d5dac72d4) ) \

ROM_START( mt_tfor2 ) /* Thunder Force 2 */
	MEGATECH_BIOS
	MEGATECH_GAME11(REGION_USER1, REGION_USER2)
ROM_END

/* Game 35 - Tommy Lasorda Baseball */

#define MEGATECH_GAME35(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp12706.ic1", 0x000000, 0x080000, CRC(8901214f) SHA1(f5ec166be1cf9b86623b9d7a78ec903b899da32a) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-35.ic2", 0x000000, 0x08000, CRC(67bbe482) SHA1(6fc283b22e68befabb44b2cc61a7f82a71d6f029) ) \


ROM_START( mt_tlbba ) /* Tommy Lasorda Baseball */
	MEGATECH_BIOS
	MEGATECH_GAME35(REGION_USER1, REGION_USER2)
ROM_END

/* Game 36 - Columns */

#define MEGATECH_GAME36(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp13193-t.ic1", 0x000000, 0x080000, CRC(8c770e2f) SHA1(02a3626025c511250a3f8fb3176eebccc646cda9) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "ep12368-36.ic3", 0x000000, 0x08000,  CRC(a4b29bac) SHA1(c9be866ac96243897d09612fe17562e0481f66e3) ) \

ROM_START( mt_cols ) /* Columns */
	MEGATECH_BIOS
	MEGATECH_GAME36(REGION_USER1, REGION_USER2)
ROM_END

/* Game 04 - Great Golf (SMS) */

#define MEGATECH_GAME04(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD( "mp11129f.ic1", 0x000000, 0x020000, CRC(c6611c84) SHA1(eab0eed872dd26b13bcf0b2dd74fcbbc078812c9) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_SMS ) \
	ROM_LOAD( "12368-04.ic2", 0x000000, 0x08000, CRC(62e5579b) SHA1(e1f531be5c40a1216d4192baeda9352384444410) ) \
	/* Also known to have the ID# MPR-11128 instead of MPR-11129F, same contents */

ROM_START( mt_ggolf )
	MEGATECH_BIOS
	MEGATECH_GAME04(REGION_USER1, REGION_USER2)
ROM_END

/* Game 05 - Great Soccer (SMS) - bad dump */

#define MEGATECH_GAME05(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD( "mp10747f.ic1", 0x000000, 0x020000, BAD_DUMP CRC(9cf53703) SHA1(c6b4d1de56bd5bf067ec7fc80449c07686d01337) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_SMS ) \
	ROM_LOAD( "12368-05.ic2", 0x000000, 0x08000, CRC(bab91fcc) SHA1(a160c9d34b253e93ac54fdcef33f95f44d8fa90c) ) \

ROM_START( mt_gsocr )
	MEGATECH_BIOS
	MEGATECH_GAME05(REGION_USER1, REGION_USER2)
ROM_END

/* Game 07 - Alien Syndrome (SMS) */

#define MEGATECH_GAME07(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD( "mpr-11194.ic1", 0x000000, 0x040000, CRC(4cc11df9) SHA1(5d786476b275de34efb95f576dd556cf4b335a83) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_SMS ) \
	ROM_LOAD( "epr-12368-07.ic2", 0x000000, 0x08000, CRC(14f4a17b) SHA1(0fc010ac95762534892f1ae16986dbf1c25399d3) ) \

ROM_START( mt_asyn ) /* Alien Syndrome (SMS based) */
	MEGATECH_BIOS
	MEGATECH_GAME07(REGION_USER1, REGION_USER2)
ROM_END

/* Game 29 - Parlour Games (SMS) */
#define MEGATECH_GAME29(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD( "mp11404.ic1", 0x000000, 0x020000, CRC(E030E66C) SHA1(06664DAF208F07CB00B603B12ECCFC3F01213A17) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_SMS ) \
	ROM_LOAD( "12368-29.ic2", 0x000000, 0x08000, CRC(534151e8) SHA1(219238d90c1d3ac07ff64c9a2098b490fff68f04) ) \


ROM_START( mt_parlg ) /* Parlour Games (SMS Based)  */
	MEGATECH_BIOS
	MEGATECH_GAME29(REGION_USER1, REGION_USER2)
ROM_END

/* Game 08 - Shinobi (SMS) */

#define MEGATECH_GAME08(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD( "mp11706.ic1", 0x000000, 0x040000, CRC(0C6FAC4E) SHA1(7C0778C055DC9C2B0AAE1D166DBDB4734E55B9D1) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_SMS ) \
	ROM_LOAD( "12368-08.ic2", 0x000000, 0x08000, CRC(103A0459) SHA1(D803DDF7926B83785E8503C985B8C78E7CCB5DAC) ) \

ROM_START( mt_shnbi ) /* Shinobi. */
	MEGATECH_BIOS
	MEGATECH_GAME08(REGION_USER1, REGION_USER2)
ROM_END

/* Game 10 - AFterburner (SMS) */

#define MEGATECH_GAME10(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD( "mp11271.ic1", 0x000000, 0x080000, CRC(1C951F8E) SHA1(51531DF038783C84640A0CAB93122E0B59E3B69A) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_SMS ) \
	ROM_LOAD( "12368-10.ic2", 0x000000, 0x08000, CRC(2A7CB590) SHA1(2236963BDDC89CA9045B530259CC7B5CCF889EAF) ) \

ROM_START( mt_aftrb ) /* Afterburner. */
	MEGATECH_BIOS
	MEGATECH_GAME10(REGION_USER1, REGION_USER2)
ROM_END

/* Game 28 - Revenge of Shinobi */

#define MEGATECH_GAME28(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp12675.ic1", 0x000000, 0x080000, CRC(672A1D4D) SHA1(5FD0AF14C8F2CF8CEAB1AE61A5A19276D861289A) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-28.ic2", 0x000000, 0x08000, CRC(0D30BEDE) SHA1(73A090D84B78A570E02FB54A33666DCADA52849B) ) \


ROM_START( mt_revsh ) /* The Revenge Of Shinobi. */
	MEGATECH_BIOS
	MEGATECH_GAME28(REGION_USER1, REGION_USER2)
ROM_END

/* Game 31 - Arnold Palmer Tournament Gold */

#define MEGATECH_GAME31(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp12645f.ic1", 0x000000, 0x080000, CRC(c07ef8d2) SHA1(9d111fdc7bb92d52bfa048cd134aa488b4f475ef) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-31.ic2", 0x000000, 0x08000, CRC(30af7e4a) SHA1(baf91d527393dc90aba9371abcb1e690bcc83c7e) ) \


ROM_START( mt_tgolf ) /* Arnold Palmer Tournament Golf */
	MEGATECH_BIOS
	MEGATECH_GAME31(REGION_USER1, REGION_USER2)
ROM_END


/* Game 47 - Alien Storm */

#define MEGATECH_GAME47(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mp13941.ic1", 0x000000, 0x080000, CRC(D71B3EE6) SHA1(05F272DAD243D132D517C303388248DC4C0482ED) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "12368-47.ic2", 0x000000, 0x08000, CRC(31FB683D) SHA1(E356DA020BBF817B97FB10C27F75CF5931EDF4FC) ) \

ROM_START( mt_astrm ) /* Alien Storm. */
	MEGATECH_BIOS
	MEGATECH_GAME47(REGION_USER1, REGION_USER2)
ROM_END

/* Game 44 - Arrow Flash */

#define MEGATECH_GAME44(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD16_WORD_SWAP( "mpr13396h.ic1", 0x000000, 0x080000, CRC(091226e3) SHA1(cb15c6277314f3c4a86b5ae5823f72811d5d269d) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "epr12368-44.ic2", 0x000000, 0x08000, CRC(e653065d) SHA1(96b014fc4df8eb2188ac94ed0a778d974fe6dcad) ) \


ROM_START( mt_arrow ) /* Arrow Flash */
	MEGATECH_BIOS
	MEGATECH_GAME44(REGION_USER1, REGION_USER2)
ROM_END

/* Game 32 - Super Real Basketball */
/* why is this pre-swapped like a console dump?? */
#define MEGATECH_GAME32(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD( "mpr-12904f.ic1", 0x000000, 0x080000, CRC(4346e11a) SHA1(c86725780027ef9783cb7884c8770cc030b0cd0d) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "epr-12368-32.ic2", 0x000000, 0x08000, CRC(f70adcbe) SHA1(d4412a7cd59fe282a1c6619aa1051a2a2e00e1aa) ) \

ROM_START( mt_srbb ) /* Super Real Basketball */
	MEGATECH_BIOS
	MEGATECH_GAME32(REGION_USER1, REGION_USER2)
ROM_END

/* Game 26 - Forgotten Worlds */
/* why is this pre-swapped like a console dump?? */
#define MEGATECH_GAME26(GAME_REGION, INSTRUCTION_REGION) \
	ROM_REGION16_BE( 0x300000, GAME_REGION, 0 ) \
	ROM_LOAD( "mpr-12672-h.ic1", 0x000000, 0x080000, CRC(d0ee6434) SHA1(8b9a37c206c332ef23dc71f09ec40e1a92b1f83a) ) \
    MEGATECH_INSTRUCTION_REGION( INSTRUCTION_REGION, MEGATECH_GAME_IS_GEN ) \
	ROM_LOAD( "epr-12368-26.ic2", 0x000000, 0x08000, CRC(4623b573) SHA1(29df4a5c5de66cd9cb7519e4f30000f7dddc2138) ) \


ROM_START( mt_fwrld ) /* Forgotten Worlds */
	MEGATECH_BIOS
	MEGATECH_GAME26(REGION_USER1, REGION_USER2)
ROM_END

/* Compilations of games to show the multi-cart support */

ROM_START( mt_comp1 )
	MEGATECH_BIOS
	MEGATECH_GAME01(REGION_USER1, REGION_USER2)
	MEGATECH_GAME13(REGION_USER3, REGION_USER4)
	MEGATECH_GAME21(REGION_USER5, REGION_USER6)
	MEGATECH_GAME06(REGION_USER7, REGION_USER8)
	MEGATECH_GAME08(REGION_USER9, REGION_USER10)
	MEGATECH_GAME28(REGION_USER11, REGION_USER12)
	MEGATECH_GAME49(REGION_USER13, REGION_USER14)
	MEGATECH_GAME60(REGION_USER15, REGION_USER16)
ROM_END


ROM_START( mt_comp2 )
	MEGATECH_BIOS
	MEGATECH_GAME10(REGION_USER1, REGION_USER2)
	MEGATECH_GAME39(REGION_USER3, REGION_USER4)
	MEGATECH_GAME24(REGION_USER5, REGION_USER6)
	MEGATECH_GAME52(REGION_USER7, REGION_USER8)
	MEGATECH_GAME29(REGION_USER9, REGION_USER10)
	MEGATECH_GAME36(REGION_USER11, REGION_USER12)
	MEGATECH_GAME40(REGION_USER13, REGION_USER14)
	MEGATECH_GAME57(REGION_USER15, REGION_USER16)
ROM_END



/* nn */ /* nn is part of the instruction rom name, should there be a game for each number? */
/* -- */ GAME( 1989, megatech, 0,        megatech, megatech, mtnew, ROT0, "Sega",                  "Mega-Tech BIOS", GAME_IS_BIOS_ROOT )
/* 01 */ GAME( 1988, mt_beast, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Altered Beast (Mega-Tech)", GAME_NOT_WORKING )
/* 02 */ GAME( 1988, mt_shar2, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Space Harrier II (Mega-Tech)", GAME_NOT_WORKING )
/* 03 */ GAME( 1988, mt_stbld, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Super Thunder Blade (Mega-Tech)", GAME_NOT_WORKING )
/* 04 */ GAME( 1987, mt_ggolf, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Great Golf (Mega-Tech, SMS based)", GAME_NOT_WORKING ) /* sms! */
/* 05 */ GAME( 198?, mt_gsocr, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Great Soccer (Mega-Tech, SMS based)", GAME_NOT_WORKING ) /* sms! also bad */
/* 06 */ GAME( 1987, mt_orun,  megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Out Run (Mega-Tech, SMS based)", GAME_NOT_WORKING ) /* sms! */
/* 07 */ GAME( 1987, mt_asyn,  megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Alien Syndrome (Mega-Tech, SMS based)", GAME_NOT_WORKING ) /* sms! */
/* 08 */ GAME( 1987, mt_shnbi, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Shinobi (Mega-Tech, SMS based)", GAME_NOT_WORKING) /* sms */
/* 09 */ // unknown
/* 10 */ GAME( 1987, mt_aftrb, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "After Burner (Mega-Tech, SMS based)", GAME_NOT_WORKING) /* sms */
/* 11 */ GAME( 1989, mt_tfor2, megatech, megatech, megatech, mtnew, ROT0, "Tecno Soft / Sega",     "Thunder Force II MD (Mega-Tech)", GAME_NOT_WORKING )
/* 12 */ // unknown
/* 13 */ GAME( 1986, mt_astro, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Astro Warrior (Mega-Tech, SMS based)", GAME_NOT_WORKING ) /* sms! */
/* 14 */ // unknown
/* 15 */ // unknown
/* 16 */ // unknown
/* 17 */ // unknown
/* 18 */ // unknown
/* 19 */ // unknown
/* 20 */ GAME( 1989, mt_lastb, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Last Battle (Mega-Tech)", GAME_NOT_WORKING )
/* 21 */ GAME( 1989, mt_wcsoc, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "World Championship Soccer (Mega-Tech)", GAME_NOT_WORKING )
/* 22 */ GAME( 1989, mt_tetri, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Tetris (Mega-Tech)", GAME_NOT_WORKING )
/* 23 */ GAME( 1989, mt_gng,   megatech, megatech, megatech, mtnew, ROT0, "Capcom / Sega",         "Ghouls'n Ghosts (Mega-Tech)", GAME_NOT_WORKING )
/* 24 */ GAME( 1989, mt_shang, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Super Hang-On (Mega-Tech)", GAME_NOT_WORKING )
/* 25 */ GAME( 1989, mt_gaxe,  megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Golden Axe (Mega-Tech)", GAME_NOT_WORKING )
/* 26 */ GAME( 1989, mt_fwrld, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Forgotten Worlds (Mega-Tech)", GAME_NOT_WORKING )
/* 27 */ GAME( 1989, mt_mystd, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Mystic Defender (Mega-Tech)", GAME_NOT_WORKING )
/* 28 */ GAME( 1989, mt_revsh, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "The Revenge of Shinobi (Mega-Tech)", GAME_NOT_WORKING )
/* 29 */ GAME( 1987, mt_parlg, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Parlour Games (Mega-Tech, SMS based)", GAME_NOT_WORKING ) /* sms! */
/* 30 */ // unknown
/* 31 */ GAME( 1989, mt_tgolf, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Arnold Palmer Tournament Golf (Mega-Tech)", GAME_NOT_WORKING )
/* 32 */ GAME( 1989, mt_srbb,  megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Super Real Basketball (Mega-Tech)", GAME_NOT_WORKING )
/* 33 */ // unknown
/* 34 */ // unknown
/* 35 */ GAME( 1989, mt_tlbba, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Tommy Lasorda Baseball (Mega-Tech)", GAME_NOT_WORKING )
/* 36 */ GAME( 1990, mt_cols,  megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Columns (Mega-Tech)", GAME_NOT_WORKING )
/* 37 */ // unknown
/* 38 */ GAME( 1990, mt_eswat, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Cyber Police ESWAT: Enhanced Special Weapons and Tactics (Mega-Tech)", GAME_NOT_WORKING )
/* 39 */ GAME( 1990, mt_smgp,  megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Super Monaco GP (Mega-Tech)", GAME_NOT_WORKING )
/* 40 */ GAME( 1990, mt_mwalk, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Moonwalker (Mega-Tech)", GAME_NOT_WORKING )
/* 41 */ GAME( 1990, mt_crack, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Crack Down (Mega-Tech)", GAME_NOT_WORKING )
/* 42 */ // unknown
/* 43 */ // unknown
/* 44 */ GAME( 1990, mt_arrow, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Arrow Flash (Mega-Tech)", GAME_NOT_WORKING )
/* 45 */ // unknown
/* 46 */ // unknown
/* 47 */ GAME( 1990, mt_astrm, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Alien Storm (Mega-Tech)", GAME_NOT_WORKING )
/* 48 */ GAME( 1991, mt_wwar,  megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Wrestle War (Mega-Tech)", GAME_NOT_WORKING ) /* Copyright 1989, 1991 Sega */
/* 49 */ GAME( 1991, mt_bbros, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Bonanza Bros. (Mega-Tech)", GAME_NOT_WORKING )
/* 50 */ // unknown
/* 51 */ // unknown
/* 52 */ GAME( 1991, mt_sonic, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Sonic The Hedgehog (Mega-Tech, set 1)", GAME_NOT_WORKING )
/*    */ GAME( 1991, mt_sonia, mt_sonic, megatech, megatech, mtnew, ROT0, "Sega",                  "Sonic The Hedgehog (Mega-Tech, set 2)", GAME_NOT_WORKING )
/* 53 */ GAME( 1990, mt_fshrk, megatech, megatech, megatech, mtnew, ROT0, "Toaplan / Sega",        "Fire Shark (Mega-Tech)", GAME_NOT_WORKING )
/* 54 */ // unknown
/* 55 */ // unknown
/* 56 */ // unknown
/* 57 */ GAME( 1991, mt_gaxe2, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Golden Axe II (Mega-Tech)", GAME_NOT_WORKING )
/* 58 */ GAME( 1991, mt_stf,   megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Joe Montana II: Sports Talk Football (Mega-Tech)", GAME_NOT_WORKING )
/* 59 */ GAME( 1991, mt_mlh,   megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Mario Lemieux Hockey (Mega-Tech)", GAME_NOT_WORKING )
/* 60 */ GAME( 1992, mt_kcham, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Kid Chameleon (Mega-Tech)", GAME_NOT_WORKING )
/* 61 */ // unknown
/* 62 */ GAME( 1992, mt_soni2, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Sonic The Hedgehog 2 (Mega-Tech)", GAME_NOT_WORKING )

/* more? */

/* Compilations to test multi-game support */
/* xx */ GAME( 1992, mt_comp1, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Mega-Tech with various carts (set 1) (Mega-Tech)", GAME_NOT_WORKING )
/* xx */ GAME( 1992, mt_comp2, megatech, megatech, megatech, mtnew, ROT0, "Sega",                  "Mega-Tech with various carts (set 2) (Mega-Tech)", GAME_NOT_WORKING )
