                GenEm   Sega Genesis/Sega Mega Drive  Emulator

                        version 0.12 PUBLIC BETA

                       (c) 1996 by Markus Gietzen

+---------------------------------------------------------------------------+
  MS-DOS Version:

     +486 or higher (386 doesn't work, speedy Pentium recommended)
     +8MB RAM       (no idea if you can play smaller games with 4MB, try it)
+---------------------------------------------------------------------------+


E-Mail:      iig05-1@htw.uni-sb.de      (READ THIS FILE _BEFORE_
             magi@stud.uni-sb.de         YOU WRITE ME!)

WWW:         http://www.htw.uni-sb.de/people/mgietzen.html

Snail-Mail:  Markus Gietzen
             Ludweilerstr. 126
             66352 Grossrosseln
             GERMANY

0. _BEFORE_ you write me:

I don't answer e-mails with these contents:
   + It's too slow, make it faster
   + Send me some games
   + Where are sites to get games from
   + The game ... doesn't work, fix it
   + When do you expect the next release
   + I want to join the beta-test
   + Why is there no ...

I DO answer every intelligent e-mail !


1. DISCLAIMERS

    o  The author does NOT provide any rom-images !
    o  Sega Genesis and Sega Mega Drive are registered trademarks of SEGA !


2. Copyright

Genem is (c) 1996 by Markus Gietzen
The Z80-emulation is (c) 1994,1995,1996 by Marat Fayzullin and
included with his permission (thanks again !).

GenEm is NOT freeware. It's gift-ware. This means that I want something
in return: a simple postcard, a beer, game-roms or even money.


3. Emulation

This is an early beta-release of GenEm. There are several things that
are not emulated or only partly emulated and can lead to non-working
games:

        o Window (often used for Score etc.)
        o Vertical Scrolling on tile-basis
        o FM-Sound (PSG sound works)
        o Z80 handling is new and therefore disabled by default (too buggy)
        o 2nd joystick
        o Speed: nothing is currently really optimized. The
                 emulator is still full of debug-code.


4. Usage

genem [-options] rom-image

Options:

-frame  x   - display every x.th frame (2=default)
-nosound    - disable sound
-z80        - ENABLE Z80-emulation
-europe     - European version   |\  USA is
-japan      - Japanease version  |/  default.

Supported file-formats:

 o .bin     binary dumps
 o .md      Multi Game Doctor II
 o .smd     Super Magic Drive

Keys:

   cursor-keys     -    direction-select
   ENTER           -    start-button
   A               -    button A
   B or S          -    button B
   C or D          -    button C
   ESC             -    power-off


Some words about the Z80-part: Some games don't start when the Z80 isn't
running. Then you can try to start the Z80-emulation ("-z80"). This works
for some games (e.g. Chaos Engine 2) but doesn't work for other games
(e.g. Herzog Zwei) because of still missing features.

Please don't create your own file-extensions ! GenEm fails if it can't
determine a supported file-extension (an autodetect in an earlier
version failed because of some non-Sega-compliant ROM-headers).

If the emulation is too slow for you then try to skip several frames.


5. Working programs

This is a short list of programs that are known to work quite well:
    + Aladdin
    + Afterburner II
    + Atomic Runner
    + Caesar's Palace
    + Echo the Dolphin
    + ESPN BaseBall tonight
    + Hard Drivin'
    + WWF Royal Rumble
    + Chester Cheetah II
    + Ghouls & Ghosts
    + Greendog
    + Art Alive
    + Ball Jack
    + The Revenge of Shinobi
    + Golden Axe III (with "-japan" option !)
    + Sonic I,II,II and Knuckles
    + Phantasy Star II
    + Klax

