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1994-11-09
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516 lines
Twilight Software
Australia
...presents...
========
XERIX II
========
The Caverns of Mars
by Brendan Reville
(c) Copyright Brendan Reville 1994
-- This program is inexpensive ShareWare --
-- Please register --
---------
Contents:
---------
Overview
ShareWare
Ordering
System Requirements
Files
Getting Started
Playing the Game
Trouble-Shooting
The Sound System
Miscellaneous
Author's Closing Words
How to Contact Twilight Software
---------
Overview:
---------
Xerix II is an awesome arcade adventure game set in the near
future. One or two players pilot their deadly fighter craft in
a perilous quest to destroy a fearsome alien force. An
intriguing plot develops admist the many levels of intense arcade
action, taking place in a variety of settings.
The shoot 'em up is redefined in this horizontally-scrolling
game, with power-ups, new weapons, energy bars and multiple
lives, true multi-dimensional parallax scrolling, detailed VGA
artwork, room-shaking sound effects and a beautiful digital sound
track, with support for virtually every digital sound card in
existence.
The action takes place deep in the underground caverns of
Mars, where a strange alien force, hostile to humans, has created
a bizarre world. As the game progresses, more of the amazing
truth is revealed.
With intuitive menus, full in-game documentation and many
registration incentives, Xerix II is going to be exciting. Hold
on for the ride of your life, and remember to register soon. If
you have trouble meeting the challenge, registration can even
help you get through the tough bits.
Brendan Reville, the 17 year-old school student who wrote
Xerix II, has established Twilight Software as a major force in
quality ShareWare games. He also wrote Xerix I, the immediate
prequel to Xerix II (and highly-popular FreeWare game), when he
was 15.
----------
Shareware:
----------
Xerix II is distributed under the ShareWare concept. The
first half of the game - the first six levels - are available for
free. If you wish to own the complete game - with all twelve
levels - you must register.
To register, contact PsL from anywhere in the world.
(Australian customers can order through Twilight Software). See
Ordering, below, for full details. The Registered version of
Xerix II contains the following extra features:
- the full 12 levels of the game, lots of intense action!
- the complete story, discover the truth!
- the cheat keys, helping you to get through the hard bits!
- new artwork, even more detailed alien worlds!
- new music, of excellent quality too!
- new end of level aliens, even more fearsome and deadly!
- new power-ups and weapon-configurations, more firepower!
- a bonus game from the author!
ORDER NOW TO RECEIVE ALL THESE THINGS!! ONLY $23.95 in the US!
ShareWare relies on you to register. Xerix II is very
reasonably priced, and the Registered version is loaded with
attractive incentives. Register today, and support the ShareWare
concept!
---------
Ordering:
---------
There are several easy ways to register Xerix II, listed below.
Choose the method most convenient to you. Note that all payments
include packing and postage.
And why register? Because the Shareware edition contains only
half of the Xerix II game. The Registered edition contains
all 12 levels, with all new backgrounds, new music, new
story segments (including the amazing truth about the
hideous alien force), new power-ups, and information on the
cheat keys to help you get through even the toughest bits!
Credit Card Orders through PsL - all customers
----------------------------------------------
You can order with MC, Visa, Amex, or Discover from Public
(software) Library (PsL) by calling 800-2424-PsL (in the USA) or
713-524-6394 (international).
Or you can send the order form (ORDER.DOC) by FAX to
713-524-6398 or by CompuServe email to 71355,470.
Or you can mail the order form to PsL at PO Box 35705,
Houston, TX 77235-5705, USA (using credit card or a cheque/money
order in US funds/US bank). Cost $23.95 US.
[Contact PsL for orders only]
Australian Customers
--------------------
Australian customers can mail the order form with a cheque or
money order to Twilight Software, PO Box 304, Milsons Point NSW
2061. Cost: $26.95 Australian Dollars.
--------------------
System Requirements:
--------------------
required:
- 386 (or higher) processor
- VGA display (or MCGA)
- 560k free RAM
supported:
for sound and music:
- Sound Blaster, Sound Blaster Pro, Sound Blaster 16, Pro
Audio spectrum +, Pro Audio Spectrum 16, Gravis
Ultrasound, Windows Sound System, AudioTrix Pro,
Aria-based sound cards or PC Internal Speaker.
- 256k EMS required for sound/music.
recommended:
- sound card
- 486/33 Mhz (or faster) processor speed
------
Files:
------
You should have the following files in the Xerix II directory:
xerix2.exe - the Xerix II program (run it!)
xerix2.dat - the Xerix II data (the game needs it)
xerix2.doc - the Xerix II documentation (you're reading it)
order.doc - the Xerix II order form (Register!)
license.doc - the Xerix II license form (vendors/users read!)
x2src.doc - information on the Source Code Package
(for programmers)
file_id.diz - a description of the game, used by BBSes
xerix2.cfg - the Xerix II configuration data file
(this is created after you first play Xerix II)
----------------
Getting Started:
----------------
Playing Xerix II is simple. Simply type "XERIX2" and you're
away.
The game will ensure that you had about 560,000 bytes of
free conventional RAM before starting. If it reports that
insufficient memory is available, proceed to free some memory.
The Trouble-Shooting section below gives some hints on this.
Typing "MEM" at the DOS prompt (for DOS 5 or higher) or "CHKDSK"
will tell you how much memory you have free (under "largest
executable program size").
The game will attempt to detect your sound card, if you have
one. Otherwise the game will use your internal speaker.
You must have at least 256k of EMS (Expanded) memory
available if you wish to hear any sounds. Typing "MEM" at the
DOS prompt (for DOS 5 or higher) will tell you how much memory
is free.
If you want to run the game without using any sound, run
"XERIX2 nosound". This can also help the game to run faster.
Once the system is initialised and the Twilight Software
logo has been displayed, the Xerix II title screen will appear.
Hit the space bar to skip this sequence.
From the Main Menu the following choices are available:
- Begin at Level One
- starts a game from the very first level.
- Begin at Level Seven
- starts a game from the halfway mark. This choice
will only be available if you own the Registered
version of Xerix II.
- Documentation
- takes you to the documentation sub-menu.
- Ordering Information
- lets you view the on-line information on ordering
the awesome Registered version of Xerix II.
- Exit
- takes you back to DOS.
Beginning a game: From this menu choice you can choose how
many players will play, and the difficulty level. Choose based
on how much of a challenge you (and your partner) want.
Viewing text: If you view Ordering Information or some of
the Documentation, you can use the arrow keys to scroll the text
up and down. Use the PageUp and PageDown keys to scroll more
quickly. Hit ESC to leave this text.
----------------
Playing the game
----------------
Player 1, the blue ship's pilot, simply uses the arrow keys to
steer the blue ship.
The following keys all have the same purpose - shooting:
Insert, Delete, 5, the grey +, the grey Enter, Right Shift.
Player 2, the red ship's pilot, uses the following "grid" of keys
to steer the red ship:
Q W E
A D
Z X C
The following keys shoot: S, Tab, Left Shift, F.
Basically, shoot everything that moves (and even the things
that don't), and try to avoid long streams of enemy craft as they
move around.
Sometimes, shooting enemy craft will reveal power-ups.
These can be:
- pink diamonds: these give you bonus points for your score.
- blue capsules: these give you new weapons. If two are
revealed near to each other, then they're probably the
same; one for each player.
- pulsing hearts: these recharge your energy.
Turning on and off sound
------------------------
The F3 key toggles (switches) the in-game music on and off.
The F4 key toggles the in-game sound effects on and off.
By turning off the sound the game can also be sped up a
little, on slower computers.
Speeding up game play
---------------------
Due to the complexity of Xerix II's graphics system, some
systems may experience slow game-play.
However, there are two solutions:
Firstly, the F1 key toggles (switches) various "layers" of
artwork on and off. The less layers there are to draw, the
faster the game will be.
Secondly, the F2 key switches between Fast mode and Normal
mode. In Fast mode, only every second frame of animation is
drawn. Hence the scrolling is a little more "jerky", but the
game speed becomes closer to its true, ideal speed.
On slow computers the sound system will also slow the game
down. The sound system can be disabled by running Xerix II with
the "nosound" argument, like this: Type "XERIX2 nosound" to run
the game.
-----------------
Trouble-Shooting:
-----------------
Insufficient memory:
Have you checked that at least 560,000 bytes of
conventional RAM are free? Use MEM or CHKDSK to find out.
Note that conventional RAM is different to extended, XMS
and EMS memory. With MEM, check that "Largest Executable
Program Size" is at least 560,000 bytes.
Create a boot-disk to boot with a minimum of settings
in AUTOEXEC.BAT and CONFIG.SYS, or use MEMMAKER or another
memory manager to solve the problem. Consult your DOS
manual for more details.
No sound:
Do you have at least 256k of EMS (Expanded) memory
free? Use MEM to find out. You might need to use an
Expanded memory manager such as EMM386 or QEMM to create
Expanded memory.
See The Sound System, below, for directions on telling
Xerix II exactly what sound-card you are using.
The program locks up (either during the game or while loading):
Try running "XERIX2 nosound" to see whether it's the
sound driver that's causing the problem.
If the program works with the "nosound" option, see
The Sound System, below, for directions on telling Xerix II
exactly what sound-card you are using.
The program locks up when run from a floppy disk:
The game is really intended to be run on a hard disk,
and so it presumes that it can write to disk without a
problem. You must make sure that the disk's write-protect
"notch" is set so that it can be written onto, before the
game is started.
Specifically, sound problems with a Gravis UltraSound:
No sound:
Try using the -GT option in the XERIX2
environment variable, as described below in The Sound
System.
Bad sound (samples sound incorrect):
Try using the -G option in the XERIX2 environment
variable, as described below in The Sound System.
-----------------
The Sound System:
-----------------
Xerix II uses a highly sophisticated sound system (called
the Digital Sound and Music Interface) to play its music and
sound effects. If you want to control specific attributes of
this sound playing, you can set the XERIX2 environment variable
(as shown below) with appropriate instructions. The following
instructions can be used:
-Sxxxx Set playback rate (4000-60000) or (4-60). Most
sound devices can only reproduce up to a certain
playback rate (like 44.1kHz) so Xerix II will
automatically adjust the given sampling rate if
it's too high.
-Ixx Set the sound card IRQ (interrupt).
-Pxxx Set sound device port address. This value is
given in hexadecimal notation (eg 220, 240).
-Dx Set sound card DMA channel.
-Cxx Force sound device selection:
1 for Sound Blaster
2 for Sound Blaster Pro
3 for PAS+ (Pro Audio Spectrum Plus)
4 for PAS16 (Pro Audio Spectrum 16)
5 for Sound Blaster 16
6 for general DAC (Covox)
7 for Aria cards
8 for Windows Sound System & compatibles
(like AudioTrix Pro)
9 for Gravis Ultrasound
10 for PC Speaker
11 for Stereo DAC (LPT1 & 2)
12 for Stereo-on-1 DAC.
-8 Force 8-bit sound output. Sets 16-bit sound
cards to 8-bit mode. This mode is a little bit
faster but the quality is very poor compared to
16-bit.
-Axxx Amplify by xxx. 31 is normal volume.
-Txxxxx Set sound playback buffer size. Xerix II
automatically adjusts the buffer size according
to sample size, stereo and sampling rate but if
you need a larger buffer, you can use this
option.
-G Use non-DMA download mode for Gravis Ultrasound.
If you encounter problems with the GUS (samples
sound incorrect), try this option.
-GT Use PC timer instead of GUS timer for playback.
If the music stops without a clear reason, it
might be a problem with GUS timer.
The XERIX2 environment variable is set at the DOS prompt,
or in a batch file, as follows:
C:> SET XERIX2=-C1 -P220 -P5
Typing "SET" at the command prompt after doing this will
show that the XERIX2 environment variable is set to the above
line. The above line tells Xerix II to use a Sound Blaster on
port 220h, with interrupt 5.
Normally, you would only use this feature to tell Xerix II
how to find your sound card if it has trouble initialising it,
as the default (automatic) settings used are best. However, if
you're feeling adventurous, you can try different settings to
find out what works for you.
--------------
Miscellaneous:
--------------
Xerix II was written over a period of about eighteen months.
All artwork, programming, designing and writing was done by
Brendan Reville. Brendan wrote over 8000 lines of program code
for the main program, as well as several thousand more for
additional data.
All the music was also by Brendan, except for four songs,
which were written by foBik, of Sydney-based group CyberSquad.
These songs are:
level 1: Lil'Hyped
level 6: KaoticSleep
level 7: Lil'Tekno
level 12: Diskordant00
Programmers:
The entire C source code to Xerix II is also available
direct from Twilight Software in Australia! Read the file
X2SRC.DOC for all the details on this once-in-a-lifetime offer.
-----------------------
Author's Closing Words:
-----------------------
"Xerix II has taken a long time to make. Finding time to
work on it admist school work, going out, playing in a band and
working on other programming projects has been, perhaps
surprisingly, a great pleasure of mine. Xerix II has grown and
matured in my eyes, and although I would have done many things
differently the second time around, I'm happy with how it has
turned out.
"I love the concept of ShareWare because it gives so many
people the chance to play my game. Xerix I, as FreeWare, was
successful in my eyes simply because of the number of people who
wrote back and told me how much they enjoyed it. I hope that
Xerix II will be just as successful, but that requires the
support of game-players like you. Please consider registering.
I have deliberately priced the game to make it inexpensive for
all customers.
"And whether you like the game or not, I'd love to hear your
comments on the game. Write to Twilight Software in Australia
with any comments or suggestions. I'd like to personally thank
all the people who wrote back regarding Xerix I.
"Hopefully Xerix II will provide you with hours of
enjoyment. If you do enjoy it, please don't hesitate to
register. Your support will allow me to produce more games,
which I would also like to make affordable for everyone.
"Thank you, and best wishes... Brendan Reville."
---------------------------------
How to Contact Twilight Software:
---------------------------------
Feel free to write to Twilight Software at:
Twilight Software
PO Box 304
Milsons Point NSW 2061
Australia
or Internet: twilight@sydney.dialix.oz.au
-----------------------------
Xerix II: The Caverns of Mars
MCMXCIV
-----------------------------