[MAME]

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
Super Real Basket Ball  171-5782    837-6963-32       610-0239-32          MPR-12904F   (838200A) EPR-12368-32 (27256)   n/a
Sonic Hedgehog 2        171-6215A   837-6963-62       610-0239-62          MPR-15000A-F (838200)  EPR-12368-62 (27256)   n/a
Mario Lemeux Hockey     171-5782    837-6963-59       610-0239-59          MPR-14376-H  (234000)  EPR-12368-59 (27256)   n/a

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