home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Acorn User 4
/
AUCD4.iso
/
arcade
/
arcgames
/
twinwd160
/
ReadMe
Wrap
Text File
|
1998-08-30
|
6KB
|
123 lines
Twin World v1.6 (30 August 1998)
==================================
System Requirements
===================
To run the game
---------------
For Archimedes series machines 1MB RAM and RISC OS 2 or later.
For Risc PC or A7000 series machines 2MB RAM and RISC OS 3.5 or later.
A joystick is recommended but not required.
To view the instructions
------------------------
StrongHelp 2 or later (the latest version can be found on author Guttorm Vik's
web page - see http://login.eunet.no/~guttorvi/strong.html).
Acorn's 'DrawFile' module v1.30 or later (the latest version can be obtained
from Acorn's FTP site - http://www.acorn.com/ftp/riscos/releases/drawfile.
arc).
Installation
============
Floppy Disc
-----------
Copy the !TwinWorld directory to a blank floppy disc. Note that !TwinWorld as
supplied is just too big to fit on an 800K floppy disc. If you have an old
machine that does not support 1.6M high density floppy discs you can leave out
the !RunImage file and it will then fit. This file is only needed for machines
running RISC OS 3.5 and above (which support high density 1.6M floppy discs.)
Hard Disc
---------
Copy the !TwinWorld directory to a directory on your hard disc.
Note: If you already have the original version of TwinWorld please delete both
the old !TwinWorld and !TwinInfo directories. The information that was
previously contained in the !TwinInfo application is now in the StrongHelp file
supplied inside the new !TwinWorld directory.
Instructions
============
For full game instructions, please refer to the StrongHelp file supplied with
the game. To view the help, click the Menu button of the mouse over the
TwinWorld icon, then select 'Help' from the 'Application' menu. Note that you
must have a copy of StrongHelp 2 in order to view the help. To see the diagram
in the section entitled 'The Scoreboard' you also need Acorn's DrawFile module.
Both StrongHelp and the DrawFile module are widely available, and if you have
Internet access may be downloaded from the addresses given above.
Version History
===============
This is the third version of Twin World. The three versions are:
1.0 - November 1990 - Original release by Cyngus Software Engineering Ltd.
1.5 - November 1996 - Cover disc for March 1997 issue of Acorn User.
1.6 - August 1998 - This release.
The main change between 1.0 and 1.5 was the addition of a new version of the
program suitable for RISC OS 3.5 and above. For users of machines that run
older versions of RISC OS this version is essentially the same as the original
1.0 version. Only one change was made - TwinWorld now supports any joystick
interface that provides a valid Joystick module (i.e. one implementing the
Joystick_Read SWI.) The code that provided explicit support for the RTFM
joystick interface in the original version has been removed.
For users of RISC OS 3.5 and above releases 1.5 and 1.6 contain a new version
of the TwinWorld program. The new version will select the best available screen
mode and will run at the correct speed regardless of the monitor's refresh
rate. The program has been designed to automatically pick the best settings,
but if you like tinkering you can alter the game's choice of screen mode and
timing method by setting some environment variables in the !Run file. See the
comments in the !Run file for more details. The new version no longer does any
direct hardware access, it only uses legal RISC OS calls, so it should be
compatible with future versions of RISC OS.
The changes between versions 1.5 and 1.6 are as follows:
- The Blackthorn levels finally have the correct music. All the music should
now be the same as the original Amiga version - if anyone out there still has
an Amiga and feels like checking, please let me know if it is. This applies to
all versions of RISC OS.
- The raster bar shading that was present on some levels of the Amiga version
has been added for RISC OS 3.5 and later. In fact it should look better than in
the original version since Acorn machines have better colour resolution than
the Amiga did (again if anyone has an Amiga and wants to check I would be
interested to know). This feature appears in the Cave levels, some of the
Forest levels, and the Swamp levels.
- When quitting the program on RISC OS 3.5 and later the screen mode is
restored to the mode that was set when the program was started.
Screen modes
------------
For users with older versions of RISC OS (below 3.5) the game runs in Mode 9.
For RISC OS 3.5 and above Twin World will run in any 256 colour screen mode
that is at least 320 pixels wide and 200 pixels high. If the mode is 400 pixels
or more in height, every pixel line is plotted twice on the screen. This avoids
the 'letterbox' effect, but it can make things look a bit blocky. The game was
designed to run at 50Hz, so in modes that have a higher refresh rate the screen
is not updated every frame, but every one and a bit frames. This gets the speed
correct, but the scrolling will no longer be perfectly smooth.
If your monitor will support modes with a 50Hz or 100Hz vertical frame rate
(you can find out by looking at the 'specifications' section of the manual
supplied with your monitor) you will get best results by using a 50Hz or 100Hz
mode. Note that even if your monitor is capable of running at these rates, the
game cannot change to a mode with this rate unless such a mode is included in
your monitor definition file. You can view and edit your monitor definition
file my using the MakeModes application supplied by Acorn, but I do not
recommend making changes unless you are confident that you understand what you
are doing. Make sure you read the MakeModes documentation and Acorn's
Application Note 254 'Creating monitor definition files for the Risc PC' before
you start. Both MakeModes and the Application Note can be downloaded from
Acorn's FTP site - see http://www.acorn.com/ftp for details. If you want to
create a new mode for Twin World I would recommend a 320x400 mode running at
50Hz or 100Hz. This will usually give the smoothest results.
---
James Byrne (jbyrne@gol.com), Tokyo, 30 August 1998.