Sarien Sierra Adventure Game Interpreter
                                 Version 0.8



What Is Sarien?
===============
Sarien is a Sierra AGI resource interpreter engine that enables you to
play early Sierra On-Line(tm) AGI version 2 and version 3 games, as well
as AGI games written by other people.

It is being written to be very portable. See doc/README.ports for a
list of current supported platforms.

Sarien is covered by the Free Software Foundation's GNU Public License
and is an open source development. Up to date information, bug tracker
and daily development snapshots are available at http://sarien.sf.net/.


Command Line Switches
=====================
Syntax is: sarien [switches] [gamedir]

Where [switches] are optionally:
  -a --agds          Enables sarien to play AGDS created games.
  -A --amiga         Forces the game to be seen as an Amiga word padded game.
  -C --crc           CRC and identify the game files and stop.
  -c --cga-palette   Use PC CGA video mode emulation.
  -d --list-dictionary
                     List dictionary words.
  -e --ega-palette   Use PC EGA palette instead of amiga-ish palette
  -L --list-games    List all the games in the ID file
  -F --full-screen   Run in full-screen mode if allowed by the graphics device
  -g --no-gfx-optimizations
                     Disable optimized graphic driver hacks (if available).
  -H --hires {0|1}   Enable/disable hi-res mode.
  -h --help          Display this help screen.
  -m --agimouse      AGI Mouse 1.0 compatibility mode.
  -n --no-sound      Disable sound output.
  -p --picture-viewer
                     Interactive picture viewer.
  -o --list-objects  List objects.
  -S --scale {num}   Window size scale (only for windowed graphics).
  -s --emulate-sound {type}
                     Emulate the sound of Sierra AGI running in different
                     computers. Valid emulations are pc, mac and amiga
  -r --aspect-ratio {0|1}
                     Adjust aspect ratio to match the PC EGA 320x200 screen.
  -v --emulate-version {version}
                     Force version to emulate. Valid v2 game versions are:
                     2.089, 2.272, 2.440, 2.917, 2.936. Valid v3 games are:
                     3.002.086, 3.002.149.
  -V --version       Display version information.
  -x --no-x-shm      Disable X shared memory extension (if available).

[gamedir] is optionally the directory the game is in, if no directory is
specified, the current directory is assumed.


Playing Games
=============
In order to play games, you will need,

	1) A Game or Demo
	2) A binary of Sarien.

For a AGI V2 games you only need the following files

	logdir
	object
	picdir
	snddir
	viewdir
	vol.*
	words.tok

For an AGI V3 game you need;

	*dir	(eg: bcdir, dmdir, grdir, kq4dir, mhdir)
	*vol.*	(eg: bcvol.*, dmvol.*, etc)
	object
	words.tok


Version Emulation
=================
Sierra Games currently ID'd:

    IBM-PC versions
	Black Cauldron (2.00)		2.439		 6/14/87
	Kings Quest 1 (2.0F)		2.917
	Kings Quest 2           	2.411
	Kings Quest 2 (2.2)    		2.917
	Kings Quest 3 (1.01)    	2.272		11/08/86
	Kings Quest 3 (2.00)    	2.435		 5/25/87
	Kings Quest 3 (2.14)    	2.936		 3/15/88
	Kings Quest 3 (2.14)    	2.936		 3/15/88
	Larry 1 (1.00)          	2.440		 6/1/87
	Mixed Up Mother Goose   	2.915
	Police Quest 1 (2.0A)   	2.911		10/23/87
	Police Quest 1 (2.0G)   	2.917		12/03/87
	Police Quest 1 (2.0G)   	2.917		12/03/87
	Space Quest 1 (1.0X)    	2.089
	Space Quest 1 (1.1A)    	2.272
	Space Quest 1 (2.2)     	2.426
	Space Quest 2           	2.912
	Space Quest 2 (2.0A)    	2.912
	Space Quest 2 (2.0C)    	2.915
	Space Quest 2 (2.0F)    	2.936
	XMAS Card 1986          	2.272
	Demo 1                  	2.915
	Demo 2                  	2.915
	Demo 3                  	2.917
	Demo 5                  	2.425
	Kings Quest 4 (v2.0)		3.002.086	 7/27/88
	Kings Quest 4 (v2.2)		3.002.086	 9/27/88
	Black Cauldron			3.002.098
	Demo 4				3.002.102
	Kings Quest 4 demo		3.002.102
	Manhunter 1 (1.22)		3.002.107	 8/31/88
	Manhunter 2 (3.02)		3.002.149	 7/26/89
	Gold Rush (5.25)		3.002.149
	Gold Rush (3.5)			3.002.149
	GR (Cracked) (3.5)		3.002.149
	GR (Cracked) (5.25)		3.002.149


    Apple IIgs versions
	Kings Quest 1 (1.0S-88223)	2.272
	Mixed Up Mother Goose		2.917
	Police Quest 1 (2.0A)		2.917
	Demo Disk 1.0C (Censored)	2.917 (guessed)
	Black Cauldron 1.0O		3.002.149	 2/24/89
	Manhunter New York 2.0E		3.002.149	10/05/88


    Apple Macintosh versions
	Kings Quest 1 (2.0C)		2.440
	Kings Quest 2 (2.0R)		2.440
	Larry 1 (1.05)                  2.440		 6/26/87
	Space Quest 2 (2.0D)		2.936


    Atari ST versions
	Donald Duck's Playground 1.0C	2.272		 8/08/86


    Amiga versions
	Kings Quest 2 (2.0J)		2.440
	Space Quest 2 (2.0F)		2.936
	Leisure Suit Larry 1 (1.05)	2.440		 6/26/87


    AGDS games
	Groza, AGDS sample game		2.440


    Notes
    	Space Quest 1 v2.426 and v2.917 are 100% identical with the
        exception of the version of the interpreter used to play them.
        Since 2.917 is the same as 2.426, I use 2.426 as the
        emulation.

	Leisure Suit Larry 1 v2.440 and v2.917 have 100% identicle
        files, just 'agi' is different. Since they are the same, I
        choose to emulate v2.440, even for the 2.917 version of the
        game.  Since they are the same it should work ok.



Copy protection
===============
Original Sierra adventure games employed copy protection in various
different schemes on several architectures.

* Key Disk

  The most common for of copy proection most Sierra gamers will be
  familiar with, is the key disk copy protection of 99% of the early
  AGI games.

  Since this copy protection was part of the Sierra interpreter and
  not a part of the actual game data files (defeating it required
  creating a hacked version of sierra.com/sierra.exe), when these
  games are played by Sarien, there is in effect, no copy protection
  at all.

* Manual Protection

  Some later games required information that was part of the
  documentation that came with the games, which included games such
  as Police Quest 1, Gold Rush, Kings Quest 4, Manhunter and Space
  Quest.

  Games such as Police Quest 1 and Space Quest made the copy protection
  part of the game itself and can't be bypassed (ie: Drink Driving
  procedures in Police Quest 1). You will still need the manuals/
  documentation to complete these games.

For other games mentioned such as Kings Quest 4 AGI, Gold Rush etc,
Sarien can activly detect and bypass this protection if compiled witj
the "Logic Patching" option. This can be tested by running sarien
with the '-V' option.


Unidentified Games
==================
Unidentified games are emulated with the 'standard' system for that
AGI version.

    	For V2 AGI games its v2.917
    	For V3 AGI games its 3.002.149

These are the most 'common' versions around for v2 and v3 games.


Differences between Sarien and Sierra AGI
=========================================
- "Fastest" speed is not available. Reasons: the effect is quite silly
  and potentially dangerous -- in modern computers it makes ego run
  at light speed and makes the game unplayable anyway. In
  multitasking systems "fastest" throws the system load at 100%. As a
  side effect, the "SIERRA" word in the Sierra demopack intros will
  pulse in a gentle, pleasant rhythm instead of the epilepsy-inducing
  stroboscopic effect of the "fastest" mode.

- System console. A transparent "Quake console" is available pressing
  the ` key. SHIFT-` toggles game input when the console is active.
  AGI commands can be issued directly in the console, use "help" for
  a list of available commands.


Credits
=======
Sarien is being written by a loony bunch of people working in their
spare time to squash bugs and add new features. See the AUTHORS file
for the credits list.