Midway MCR Monoboard port for MiSTer

Original readme (mostly irrelevant to MiSTer)

Keyboard inputs :

   ESC         : Coin 1
   UP,DOWN,LEFT,RIGHT arrows : Player 1
   LCtrl  : Fire A
   LAlt   : Fire B
   Space  : Fire C   
   LShift : Fire D
   Z      : Fire E
   X      : Fire F 


   MAME/IPAC/JPAC Style Keyboard inputs:
     5           : Coin 1
     6           : Coin 2
     1           : Start 1 Player
     2           : Start 2 Player
     R,F,D,G     : Player 2
     A           : Fire2 A
     S           : Fire2 B 
     Q           : Fire2 C
     W           : Fire2 D
     I           : Fire2 E
     K           : Fire2 F
	
 Joystick support. 

Games

Sarge

Supported 2 control modes:

1. Up/Down - left side, X/B - right side, A - Fire 1, Y - Fire 2
2. Up/Down/Left/Right - movements, A - Fire 1, B - Fire 2

Rampage

Up to 3 players. Up/Down/Left/Right - movements, A - Punch, B - Jump

Power Drive

Up to 3 players. Each playey has its own coin button to join. A - Left Wheel, B - Right Wheel, C - Wheelie, D - 4WD/2WD

Max RPM

Up to 2 players. Each player has its own start button to join. Left/Right - Steering, Up/Down - Thottle +/-, A,B - Gear +/-

Demolition Derby

Up to 4 players. Each player has its own start button to join. Left/Right - Steering, A - Forward, B - Reverse

Star Guards

Up to 3 players. Each playey has its own coin and start buttons to join. Supported 2 control modes:

1. A - Fire right, B - Fire bottom, X - Fire up, Y - Fire left.
2. Any of A/B/X/Y is fire to the fly direction.

ROMs

                                 *** Attention ***

ROMs are not included. In order to use this arcade, you need to provide the
correct ROMs.

To simplify the process .mra files are provided in the releases folder, that
specifies the required ROMs with checksums. The ROMs .zip filename refers to the
corresponding file of the M.A.M.E. project.

Please refer to https://github.com/MiSTer-devel/Main_MiSTer/wiki/Arcade-Roms for
information on how to setup and use the environment.

Quickreference for folders and file placement:

/_Arcade/<game name>.mra
/_Arcade/cores/<game rbf>.rbf
/_Arcade/mame/<mame rom>.zip
/_Arcade/hbmame/<hbmame rom>.zip

Launch game using the appropriate .MRA