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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/strict.dtd";>
<html>
<head>
<title>ArcEm Manual</title>
</head>
<body>
<h1>ArcEm - The Acorn System Emulator</h1>
<h3>Development version (CVS HEAD)</h3>
<p>This user manual is for the latest version only available from CVS.<br><a
href="http://arcem.sf.net/";>http://arcem.sf.net/</a>
</p>
<p> </p>
<hr>
<h2>Contents</h2>
<ul>
<li><a href="#install">Installing ArcEm</a></li>
<li><a href="#compiling">Compiling ArcEm</a></li>
<li><a href="using">Using ArcEm</a>
<ul>
<li><a href="#romimages">ROM Images</a></li>
<li><a href="#mouseinput">Mouse Input</a></li>
<li><a href="#floppies">Using floppies</a></li>
<li><a href="#HDimages">Using HD images</a></li>
<li><a href="#commandline">Commandline options</a></li>
<li><a href="#arcemrc">arcemrc file</a></li>
<li><a href="#riscosusage">RISC OS specific Usage</a>
<ul>
<li><a href="#riscosusagehostfs">HostFS</a></li>
<li><a href="#riscosusagescrollwheel">Mouse Scrollwheel
support</a></li>
<li><a href="#riscosusageextramodes">Extra Screen Modes</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#issues">Known Issues and bugs</a>
<ul>
<li><a href="#knownall">All platforms</a></li>
<li><a href="#knownX">Unix/X Windows</a></li>
<li><a href="#knownWIN32">Microsoft Windows</a></li>
<li><a href="#knownOSX">Mac OS X</a></li>
<li><a href="#knownRO">RISC OS</a></li>
<li><a href="#knownAMIGA">Amiga</a></li>
</ul></li>
</ul>
<hr>
<p></p>
<a name="install"></a>
<h3>Installation</h3>
Once installed all versions require a ROM image file, see below
<ul>
<li><b>Unix/X Windows</b>
<p>Download the src archive and follow the compilation instructions below.
Once compiled copy the arcemrc file to your home directory as .arcemrc.
When run there is some output on the console.</p>
</li>
</li>
<li><b>Microsoft Windows</b>
<p>Extract the archive and supply a ROM image, the program is called
ArcEm.exe. Create a shortcut to this file if you want to add it to your start
menu or desktop.</p>
</li>
<li><b>Mac OS X</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>RISC OS</b>
<p>Please see the !Help file within the !ArcEm application for usage
information.</p>
</li>
<li><b>Amiga</b>
<p>Extract the archive to any directory you choose, just add a file called
ROM as described below.</p>
</li>
</ul>
<hr>
<a name="compiling">
<h3>Compiling ArcEm</h3>
</a>
<ul>
<li><b>Unix/X Windows</b>
<p>The X windows version compiles up using the 'Makefile' contained in the
root of the source package. If you have a big endian processor, such as
Sparc or PowerPC edit
the HOST_BIGENDIAN=no to HOST_BIGENDIAN=yes near the top of the Makefile.
<pre>
make
</pre>
</p>
</li>
<li><b>Microsoft Windows</b>
<p>ArcEm will build under <a
href="http://sources.redhat.com/cygwin/";>Cygwin</a>.
It builds a version which is independent of Cygwin (unlike the previous
version of ArcEm for Windows), so you will also need to ensure you have
mingw-runtime library installed (from Cygwin setup). Use the following
command:
<pre>
make SYSTEM=win
</pre>
Additionally, ArcEm will build in Microsoft Visual C 6. Project files are
provided for this in the 'vc' directory. There are also project files in
'vc' for Microsoft Studio 2005.
</p>
</li>
<li><b>Mac OS X</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>RISC OS</b>
<p> ArcEm builds with GCC. You should use the following command:
<pre>
make SYSTEM=riscos-single
</pre>
It is possible to build with Leo White's RiscXLib if you really want to make
an X Windows version under RISC OS, but that is beyond the scope of
this guide. Finally, it is also possible to cross compile it using <a
href="http://hard-mofo.dsvr.net/gcc/";>GCCSDK</a>.
e.g.:
<pre>
CC=/home/riscos/cross/bin/gcc make SYSTEM=riscos-single
</pre>
The desktop version of ArcEm has not been developed yet, and will not build.
</p>
</li>
<li><b>Amiga</b>
<p>You will need the official Amiga OS4 SDK and GCC, then build with the
following commands:
<pre>
stack 500000
make SYSTEM=amiga
</pre>
It will not compile with anything other than the OS4 includes. GCC 3.4.4 and
4.0.2 are known to work.
</p>
</li>
</ul>
<hr>
<a name="using">
<h3>Using ArcEm</h3>
</a> <a name="romimages">
<h4>ROM images</h4>
</a>
<p>As ArcEm is only a hardware emulator to make it do anything useful you need
an operating system ROM. ArcEm has been tested with and is known to work with
ARM Linux, RISC OS 3.10, RISC OS 3.11 and RISC OS 3.19. ARM Linux ROMs are
freely available, check the website. RISC OS 3.1x ROMs can be extracted from
a real Acorn machine using the following commands on RISC OS.
<pre>
*save :0.$.ROM1 3800000 3880000
*save :0.$.ROM2 3880000 3900000
*save :0.$.ROM3 3900000 3980000
*save :0.$.ROM4 3980000 3a00000
</pre>
Copy these files to your host operating system, RISC OS 3.1x supports DOS
formatted
floppy discs so you can use them to transfer the files. ArcEm needs the ROM file
to be in one part (rather than the 4 you just created) so join them back
together
using this command.
</p>
<ul>
<li><b>Unix/XWindows</b>
<p>From a shell prompt</p>
<pre>cat ROM1 ROM2 ROM3 ROM4 > ROM</pre>
</li>
<li><b>Windows</b>
<p>From a cmd.exe command prompt</p>
<pre>copy /b ROM1+ROM2+ROM3+ROM4 ROM</pre>
</li>
<li><b>Mac OS X</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>RISC OS</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>Amiga</b>
<p>From the commandline</p>
<pre>join ROM1 ROM2 ROM3 ROM4 as ROM</pre>
</li>
</ul>
<p>Alternate sources of ROM images, you can download a copy of the RISC OS 3.10
ROM image as a support file from the <a
href="http://home.tiscali.nl/~jandboer/";>!A310emu
website</a>, it's in the file <a
href="http://home.tiscali.nl/~jandboer/support2.zip";>support2.zip</a> and
is called ro310, you should rename ro310 to ROM before using it with
ArcEm.</p>
<a name="mouseinput">
<h4>Mouse Input</h4>
</a>
<p>Some of the platforms require specific instructions to let you move the mouse
around.</p>
<ul>
<li><b>Unix/X Windows</b>
<p>Whilst the Main display window has the focus, press the + key on the
numeric
keypad to 'capture' the mouse. To 'free' the mouse again for use with the
rest of your X desktop press numeric keypad + again.</p>
</li>
<li><b>Windows</b>
<p>Although there is some mouse movement when you move the cursor over the
display window, you can use the Unix/XWindows style numeric keypad +
toggle
to 'capture' and 'free' the mouse for better performance. Currently mouse
handling on the Windows build is very poor.</p>
</li>
<li><b>Mac OS X</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>RISC OS</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>Amiga</b>
<p>The Amiga version runs full-screen and captures all mouse input until
you quit the program. You can quit ArcEm from the menu you can bring up with
the Left Amiga key.</p>
</li>
</ul>
<a name="floppies">
<h4>Using floppies</h4>
</a>
<p>All the platforms support using .adf format floppy disc images. A
disc image is a binary dump of the contents of a floppy disc. ArcEm has no
support for directly using the host computers real floppy disc drive.</p>
<p>The basic support for floppy discs is to allow you to have the following
floppy disc images in the current working directory of the ArcEm
executable.<br>
FloppyImage0<br>
FloppyImage1<br>
FloppyImage2<br>
FloppyImage3<br>
These are then available under RISC OS as the 4 disc drives ADFS:0 to ADFS:3,
on Linux they are accessible as <font color="#FF0000">TODO</font>. </p>
<p>Some platforms provide extra support for using floppy discs.</p>
<ul>
<li><b>Unix/XWindows</b>
<p>Whilst the control pane window has the focus, pressing 0, 1, 2 or 3 will
eject/insert floppy disc images, those images still have to be named as
above,
but with moving of images around you should be able to change discs at run
time.</p>
</li>
<li><b>Mac OS X</b>
<p><font color="#FF0000">TODO</font> Mention the GUI method of selecting disc
images.</p>
</li>
<li><b>Amiga</b>
<p>A menu to change the disc in drive 0 can be called up with the LAmiga
key</p>
</li>
</ul>
<a name="HDimages">
<h4>Using HD images</h4>
</a><p>ArcEm supports up to 4 Harddiscs, hard disc images are binary files that
represent a hard drive's contents. ArcEm support the ST506 disc interface from
Archimedes computers allowing it to support drives up to 64MB in size. Hard
drive images should be placed in the current working directory of ArcEm and be
named<br>
HardImage0<br>
HardImage1<br>
HardImage2<br>
HardImage3<br>
You also need to specify the hard drive "shape" in the arcemrc config
file. The "shape" lists the number of Heads, Cylinders, Sectors and
the Record Size, these 4 numbers multiplied together are equal to the size in
bytes of the hard drive image.</p>
<p>In RISC OS, you will also need to use the !Configure application to set the
number of hard drives inside that OS.</p>
<a name="commandline">
<h4>Commandline options</h4>
</a>
<p>ArcEm supports commandline options under Unix/X Windows and other platforms.
The Amiga version will also accept them as tooltypes.</p>
<table border="1">
<tr><th>Option</th><th>Meaning</th><th>Allowed values</th><th>Default
Value</th></tr>
<tr><td>--help</td><td>Display list of available options and exit</td></tr>
<tr><td>--version</td><td>Display version number and exit</td></tr>
<tr><td>--rom <value></td><td>Specify the name of a romimage other
than ROM</td><td>Path from place of execution to ROM image</td><td>ROM</td></tr>
<tr><td>--extnromdir <value></td><td>Specify the directory to use as
the extnrom directory</td><td>Path from place of execution for extnrom
dir</td><td>extnrom/</td></tr>
<tr><td>--hostfsdir <value></td><td>Specify the directory to use as
the base of hostfs</td><td>Path from place of execution to base of
hostfs</td><td>hostfs/</td></tr>
<tr><td>--memory <value></td><td>Change the amount of memory the
emulated machine has</td><td>256K 512K 1M 2M 4M 8M 12M 16M</td><td>4M</td></tr>
<tr><td>--processor</td><td>Change the emulated machine's
processor</td><td>ARM2 ARM3 ARM250</td><td>ARM250</td></tr>
</table>
<a name="arcemrc">
<h4>arcemrc file</h4>
</a>
<p>The arcemrc files stores information about the number and 'shape' of
harddisc's attached to the emulated machine. Here is an example arcemrc:</p>
<pre>
MFM disc
1 1024 8 32 256
MFM disc
2 612 4 32 256
</pre>
<p>The five numbers represent the following:<br>
1) Hard drive number: 0 to 3 inclusive.<br>
2) Number of Cylinders: 1 to 1024 inclusive.<br>
3) Number of Heads: 1 to 256 inclusive.<br>
4) Number of Sectors per track: 1 to 256 inclusive.<br>
5) Sector Length: 256, 512, 1024, 2048, or 4096.<br>
</p>
<p>For the premade hard drive images available on the website the shape
information should be available. For your own harddiscs that you have imaged
you should check the Harddrive itself, as the number of cylinders, sectors and
heads is normally printed on it.</p>
<a name="riscosusage">
<h4>RISC OS specific Usage</h4>
</a>
<p>This section details some of the code that is only relevant when ArcEm is
running RISC OS, it does not apply for ARM Linux</p>
<a name="riscosusagehostfs">
<h5>HostFS</h5>
</a>
<p>Make sure the files hostfs,ffa, hostfsfiler,ffa and support,ffa are copied
or 'sym-linked' from their support_modules sub directories into the 'extnrom'
directory.</p>
<p>Create a directory called 'hostfs' in your executable directory, if it does
not exist already. This directory is the root of the 'virtual harddisc'. (You
can override this directory and put it in a different place with a commandline
option).
<p>When you boot up RISC OS 3.1x there should be a HostFS icon in the bottom
left of the screen, clicking this will open up the host filing system and
behaves in the same manner as a real Archimedes harddisc.</p>
<p>Simply copy files on your host into the hostfs directory and they will be
available to RISC OS.</p>
<p>RISC OS filetypes are written to the host in the style of NFS mounts on Unix
with a ,XXX on the end, eg a textfile would appear to be textfile,ffd.</p>
<p>Files copied into the hostfs directory are unlikely to have their RISC OS
filetypes, use the RISC OS 'set type ' function in the filer.</p>
<p>Known Issues:</p>
<ul>
<li>Does not work at all on Windows/RISC OS builds of ArcEm.</li>
<li>Files on the host side are not allowed to have dollars in the filename, eg
'textfile$' would not work, but 'textfile' would be fine.
<li>Errors that occur when performing actions on the host filing system are
often not well reported under RISC OS.</p>
</ul>
<a name="riscosusagescrollwheel">
<h5>Mouse Scrollwheel support</h5>
</a>
<p>Make sure the file scrollwheel,ffa is copied or 'symlinked' from the
'support_modules/scrollwheel' directory into the 'extnrom' directory.</p>
<p>Spinning the scrollwheel up and down in RISC OS over windows that are
vertically scrollable works in the way you'd expect.</p>
<p>Known Issues:</p>
<ul>
<li>Only works in the Unix/X Windows, MS Windows and Amiga builds of
ArcEm.</li>
</ul>
<a name="riscosusageextramodes">
<h5>Additional Screen modes</h5>
</a>
<p>Make sure the file ArcemModes,ffa is copied or 'symlinked' from the
'support_modules/modes' directory into the 'extnrom' directory.</p>
<p>Once the module is loaded these modes can be chosen in the normal RISC OS
way, by typing:</p>
<pre>
*wimpmode <number>
</pre>
<p>Here's a list of provided modes</p>
<table border="1">
<tr><th>Mode Number</th><th>X</th><th>Y</th><th>colours</th></tr>
<tr><td>32</td><td>800</td><td>600</td><td>256</td></tr>
<tr><td>100</td><td>1024</td><td>768</td><td>2</td></tr>
<tr><td>101</td><td>1024</td><td>768</td><td>4</td></tr>
<tr><td>102</td><td>1024</td><td>768</td><td>16</td></tr>
<tr><td>104</td><td>1280</td><td>1016</td><td>2</td></tr>
<tr><td>105</td><td>1280</td><td>1016</td><td>4</td></tr>
<tr><td>108</td><td>1152</td><td>864</td><td>2</td></tr>
<tr><td>109</td><td>1152</td><td>864</td><td>4</td></tr>
<tr><td>112</td><td>1400</td><td>520</td><td>16</td></tr>
<tr><td>120</td><td>1600</td><td>600</td><td>16</td></tr>
<tr><td>122</td><td>240</td><td>320</td><td>2</td></tr>
<tr><td>123</td><td>240</td><td>320</td><td>4</td></tr>
<tr><td>124</td><td>240</td><td>320</td><td>16</td></tr>
<tr><td>125</td><td>240</td><td>320</td><td>256</td></tr>
</table>
<p>Known Issues:</p>
<ul>
<li>Modes larger than 800x600 will only work under Unix/X Windows and Amiga
builds of ArcEm, however modes 32, 122, 123, 124 and 125 will work on all
platforms.</li>
<li>Mode 122 is slightly buggy and looks very odd.</li>
</ul>
<hr>
<a name="issues">
<h3>Known Issues and bugs</h3>
</a>
<a name="knownall">
<h4>All platforms</h4>
</a>
<p>There is no support for emulating 256K/512K/1MB RAM machines.</p>
<p>2MB RAM support incorrectly has a 32KB page size set, real machines have a
16KB page size, RISC OS copes with this and boots as normal.</p>
<p>All interlaced modes are displayed at their logical resolution, this means
displays in some modes appear to be half the height they would appear on real
monitors.</p>
<a name="knownX">
<h4>Unix/X Windows</h4>
</a>
<p>?</p>
<a name="knownWIN32">
<h4>Microsoft Windows</h4>
</a>
<p>The version 1.00 binary is very unstable and crashes regularly.</p>
<p>The only menu items that do anything are Quit and About.</p>
<p>The mouse handling is very poor.</p>
<p>The Windows version has no diagnostics if anything goes wrong and will quite
without warning (unless you rebuild with a console).</p>
<p>ARM Linux does not currently work in the Windows version of
the emulator. There is an unknown issue with harddrive access.</p>
<a name="knownOSX">
<h4>Mac OS X</h4>
</a>
<p><font color="#FF0000">TODO</font></p>
<a name="knownRO">
<h4>RISC OS</h4>
</a>
<p>The RISC OS version is very slow.</p>
<a name="knownAMIGA">
<h4>Amiga</h4>
</a>
<p>There is no error output when run from Workbench (it appears to do nothing
when ROM is not found). You can get the error output by
starting it from the Shell.</p>
<p>ArcEm always opens an 8-bit screen even if the emulation requests a lower
depth.</p>
<p>There is intentionally no keyboard remapping, keys are mapped based on
position.</p>
<p>It will only run full screen, not windowed.</p>
</p>
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<td><img alt="ArcEm Logo" src="../arcemlogo.png"></td>
<td>
<h1>ArcEm - The Acorn System Emulator</h1>
</td>
</tr>
</table>
<table width="100%" cellspacing="5" cellpadding="5">
<tr>
<td valign="top" class="red">
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<tr>
<td valign="top" id="nav">
<a class="page" href="../index.html">ArcEm Home</a>
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<a class="page" href="../changelog.html">ChangeLog</a>
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<a class="page" href="../manual/">User Manual</a>
<a class="section" href="../manual/arcem-1.00.html">ArcEm 1.00</a>
<a class="section"
href="../manual/development.html">Development</a>
<p><b>Project Links:</b></p>
<a href="http://sourceforge.net/projects/arcem/";>SourceForge
Page</a>
</td>
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<td valign="top" align="center"> <a target="_top"
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border="0" alt="SourceForge Logo"></a> </td>
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</td>
<td valign="top">
<h3>ArcEm User Manual</h3>
<p>We preserve user manuals from all our releases, as well as for the
latest version currently in development. Please choose the appropriate manual
from the following list:</p>
<ul>
<li><a href="arcem-1.00.html">ArcEm 1.00</a></li>
<li><a href="development.html">Development version (CVS HEAD)</a></li>
</ul>
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<title>ArcEm Manual</title>
</head>
<body>
<h1>ArcEm - The Acorn System Emulator</h1>
<h3>ArcEm 1.00</h3>
<p><a href="http://arcem.sf.net/";>http://arcem.sf.net/</a>
</p>
<p> </p>
<hr>
<h2>Contents</h2>
<ul>
<li><a href="#install">Installing ArcEm</a></li>
<li><a href="#compiling">Compiling ArcEm</a></li>
<li><a href="using">Using ArcEm</a>
<ul>
<li><a href="#romimages">ROM Images</a></li>
<li><a href="#mouseinput">Mouse Input</a></li>
<li><a href="#floppies">Using floppies</a></li>
<li><a href="#HDimages">Using HD images</a></li>
<li><a href="#arcemrc">arcemrc file</a></li>
</ul>
</li>
<li><a href="#issues">Known Issues and bugs</a>
<ul>
<li><a href="#knownall">All platforms</a></li>
<li><a href="#knownX">Unix/X Windows</a></li>
<li><a href="#knownWIN32">Microsoft Windows</a></li>
<li><a href="#knownOSX">Mac OS X</a></li>
<li><a href="#knownRO">RISC OS</a></li>
<li><a href="#knownAMIGA">Amiga</a></li>
</ul></li>
</ul>
<hr>
<p></p>
<a name="install"></a>
<h3>Installation</h3>
Once installed all versions require a ROM image file, see below
<ul>
<li><b>Unix/X Windows</b>
<p>Download the src archive and follow the compilation instructions below.
Once compiled copy the arcemrc file to your home directory as .arcemrc.
When run there is some output on the console.</p>
</li>
<li><b>Microsoft Windows</b>
<p>Extract the archive and supply a ROM image, the program is called
ArcEm.exe. Create a shortcut to this file if you want to add it to your start
menu or desktop.</p>
</li>
<li><b>Mac OS X</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>RISC OS</b>
<p>Please see the !Help file within the !ArcEm application for usage
information.</p>
</li>
<li><b>Amiga</b>
<p>Extract the archive to any directory you choose, just add a file called
ROM as described below.</p>
</li>
</ul>
<hr>
<a name="compiling">
<h3>Compiling ArcEm</h3>
</a>
<ul>
<li><b>Unix/X Windows</b>
<p>The X windows version compiles up using the 'Makefile' contained in the
root of the source package. If you have a big endian processor, such as
Sparc or PowerPC edit the Makefile to add the -DHOST_BIGENDIAN flag to
the CFLAGS field.
<pre>
make
</pre>
</p>
</li>
<li><b>Microsoft Windows</b>
<p>ArcEm will build under <a
href="http://sources.redhat.com/cygwin/";>Cygwin</a>.
It builds a version which is independent of Cygwin (unlike the previous
version of ArcEm for Windows), so you will also need to ensure you have
mingw-runtime library installed (from Cygwin setup). Use the following
command:
<pre>
make SYSTEM=win
</pre>
Additionally, ArcEm will build in Microsoft Visual C 6. Project files are
provided for this in the 'vc' directory.
</p>
</li>
<li><b>Mac OS X</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>RISC OS</b>
<p> ArcEm builds with GCC. You should use the following command:
<pre>
make SYSTEM=riscos-single
</pre>
It is possible to build with Leo White's RiscXLib if you really want to make
an X Windows version under RISC OS, but that is beyond the scope of
this guide. Finally, it is also possible to cross compile it using <a
href="http://hard-mofo.dsvr.net/gcc/";>GCCSDK</a>.
e.g.:
<pre>
CC=/home/riscos/cross/bin/gcc make SYSTEM=riscos-single
</pre>
The desktop version of ArcEm has not been developed yet, and will not build.
</p>
</li>
<li><b>Amiga</b>
<p>You will need the official Amiga OS4 SDK and GCC, then build with the
following commands:
<pre>
stack 500000
make SYSTEM=amiga
</pre>
It will not compile with anything other than the OS4 includes. GCC 3.4.4 and
4.0.2 are known to work.
</p>
</li>
</ul>
<hr>
<a name="using">
<h3>Using ArcEm</h3>
</a> <a name="romimages">
<h4>ROM images</h4>
</a>
<p>As ArcEm is only a hardware emulator to make it do anything useful you need
an operating system ROM. ArcEm has been tested with and is known to work with
ARM Linux, RISC OS 3.10, RISC OS 3.11 and RISC OS 3.19. ARM Linux ROMs are
freely available, check the website. RISC OS 3.1x ROMs can be extracted from
a real Acorn machine using the following commands on RISC OS.
<pre>
*save :0.$.ROM1 3800000 3880000
*save :0.$.ROM2 3880000 3900000
*save :0.$.ROM3 3900000 3980000
*save :0.$.ROM4 3980000 3a00000
</pre>
Copy these files to your host operating system, RISC OS 3.1x supports DOS
formatted
floppy discs so you can use them to transfer the files. ArcEm needs the ROM file
to be in one part (rather than the 4 you just created) so join them back
together
using this command.
</p>
<ul>
<li><b>Unix/XWindows</b>
<p>From a shell prompt</p>
<pre>cat ROM1 ROM2 ROM3 ROM4 > ROM</pre>
</li>
<li><b>Windows</b>
<p>From a cmd.exe command prompt</p>
<pre>copy /b ROM1+ROM2+ROM3+ROM4 ROM</pre>
</li>
<li><b>Mac OS X</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>RISC OS</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>Amiga</b>
<p>From the commandline</p>
<pre>join ROM1 ROM2 ROM3 ROM4 as ROM</pre>
</li>
</ul>
<p>Alternate sources of ROM images, you can download a copy of the RISC OS 3.10
ROM image as a support file from the <a
href="http://home.tiscali.nl/~jandboer/";>!A310emu
website</a>, it's in the file <a
href="http://home.tiscali.nl/~jandboer/support2.zip";>support2.zip</a> and
is called ro310, you should rename ro310 to ROM before using it with
ArcEm.</p>
<a name="mouseinput">
<h4>Mouse Input</h4>
</a>
<p>Some of the platforms require specific instructions to let you move the mouse
around.</p>
<ul>
<li><b>Unix/X Windows</b>
<p>Whilst the Main display window has the focus, press the + key on the
numeric
keypad to 'capture' the mouse. To 'free' the mouse again for use with the
rest of your X desktop press numeric keypad + again.</p>
</li>
<li><b>Windows</b>
<p>Although there is some mouse movement when you move the cursor over the
display window, you can use the Unix/XWindows style numeric keypad +
toggle
to 'capture' and 'free' the mouse for better performance. Currently mouse
handling on the Windows build is very poor.</p>
</li>
<li><b>Mac OS X</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>RISC OS</b>
<p><font color="#FF0000">TODO</font></p>
</li>
<li><b>Amiga</b>
<p>The Amiga version runs full-screen and captures all mouse input until
you quit the program. You can quit ArcEm from the menu you can bring up with
the Left Amiga key.</p>
</li>
</ul>
<a name="floppies">
<h4>Using floppies</h4>
</a>
<p>All the platforms support using .adf format floppy disc images. A
disc image is a binary dump of the contents of a floppy disc. ArcEm has no
support for directly using the host computers real floppy disc drive.</p>
<p>The basic support for floppy discs is to allow you to have the following
floppy disc images in the current working directory of the ArcEm
executable.<br>
FloppyImage0<br>
FloppyImage1<br>
FloppyImage2<br>
FloppyImage3<br>
These are then available under RISC OS as the 4 disc drives ADFS:0 to ADFS:3,
on Linux they are accessible as <font color="#FF0000">TODO</font>. </p>
<p>Some platforms provide extra support for using floppy discs.</p>
<ul>
<li><b>Unix/XWindows</b>
<p>Whilst the control pane window has the focus, pressing 0, 1, 2 or 3 will
eject/insert floppy disc images, those images still have to be named as
above,
but with moving of images around you should be able to change discs at run
time.</p>
</li>
<li><b>Mac OS X</b>
<p><font color="#FF0000">TODO</font> Mention the GUI method of selecting disc
images.</p>
</li>
<li><b>Amiga</b>
<p>A menu to change the disc in drive 0 can be called up with the LAmiga
key</p>
</li>
</ul>
<a name="HDimages">
<h4>Using HD images</h4>
</a><p>ArcEm supports up to 4 Harddiscs, hard disc images are binary files that
represent a hard drive's contents. ArcEm support the ST506 disc interface from
Archimedes computers allowing it to support drives up to 64MB in size. Hard
drive images should be placed in the current working directory of ArcEm and be
named<br>
HardImage0<br>
HardImage1<br>
HardImage2<br>
HardImage3<br>
You also need to specify the hard drive "shape" in the arcemrc config file. The
"shape" lists the number of Heads, Cylinders, Sectors and the Record Size,
these 4 numbers multiplied together are equal to the size in bytes of the hard
drive image.</p>
<p>In RISC OS, you will also need to use the !Configure application to set the
number of hard drives inside that OS.</p>
<a name="arcemrc">
<h4>arcemrc file</h4>
</a>
<p>The arcemrc files stores information about the number and 'shape' of
harddisc's attached to the emulated machine. Here is an example arcemrc:</p>
<pre>
MFM disc
1 1024 8 32 256
MFM disc
2 612 4 32 256
</pre>
<p>The five numbers represent the following:<br>
1) Hard drive number: 0 to 3 inclusive.<br>
2) Number of Cylinders: 1 to 1024 inclusive.<br>
3) Number of Heads: 1 to 256 inclusive.<br>
4) Number of Sectors per track: 1 to 256 inclusive.<br>
5) Sector Length: 256, 512, 1024, 2048, or 4096.<br>
</p>
<p>For the premade hard drive images available on the website the shape
information should be available. For your own harddiscs that you have imaged
you should check the Harddrive itself, as the number of cylinders, sectors and
heads is normally printed on it.</p>
<hr>
<a name="issues">
<h3>Known Issues and bugs</h3>
</a>
<a name="knownall">
<h4>All platforms</h4>
</a>
<p>There is no support for emulating 256K/512K/1MB RAM machines.</p>
<p>2MB RAM support incorrectly has a 32KB page size set, real machines have a
16KB page size, RISC OS copes with this and boots as normal.</p>
<p>All interlaced modes are displayed at their logical resolution, this means
displays in some modes appear to be half the height they would appear on real
monitors.</p>
<a name="knownX">
<h4>Unix/X Windows</h4>
</a>
<p>The display window doesn't resize on mode changes and remains at 800x600.</p>
<a name="knownWIN32">
<h4>Microsoft Windows</h4>
</a>
<p>The version 1.00 binary is very unstable and crashes regularly.</p>
<p>The only menu items that do anything are Quit and About.</p>
<p>The mouse handling is very poor.</p>
<p>The Windows version has no diagnostics if anything goes wrong and will quite
without warning (unless you rebuild with a console).</p>
<p>ARM Linux does not currently work in the Windows version of
the emulator. There is an unknown issue with harddrive access.</p>
<a name="knownOSX">
<h4>Mac OS X</h4>
</a>
<p><font color="#FF0000">TODO</font></p>
<a name="knownRO">
<h4>RISC OS</h4>
</a>
<p>The RISC OS version is very slow.</p>
<a name="knownAMIGA">
<h4>Amiga</h4>
</a>
<p>There is no error output when run from Workbench (it appears to do nothing
when ROM is not found). You can get the error output by
starting it from the Shell.</p>
<p>ArcEm always opens an 8-bit screen even if the emulation requests a lower
depth.</p>
<p>There is intentionally no keyboard remapping, keys are mapped based on
position.</p>
<p>It will only run full screen, not windowed.</p>
</p>
</body>
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