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<title> FDisasm (Alpha) </title>
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<i> <a href="https://www.gryphel.com/index.html">www.gryphel.com</a>/c/<a href="../../../index.html">minivmac</a>/<a href="../../index.html">extras</a>/<a href="../index.html">fdisasm</a>/a
- <a href="https://www.gryphel.com/c/c/feedback.html">feedback</a> </i>
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<h2 align=center>
FDisasm (Alpha)
</h2>
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<p> Download </p>
<blockquote>
<p>
<a href="https://www.gryphel.com/d/minivmac/extras/fdisasm/a/fdisasm200105.zip">fdisasm200105.zip</a>
(<a href="https://www.gryphel.com/d/minivmac/extras/fdisasm/a/fdisasm200105.inf.txt">info</a>)
a zipped hfs disk image and checksum file.
The disk image can be mounted with Mini vMac.
Includes source code.
</p>
<p>
<a href="https://www.gryphel.com/d/minivmac/extras/fdisasm/a/fdplusv3-191208.zip">fdplusv3-191208.zip</a>
(<a href="https://www.gryphel.com/d/minivmac/extras/fdisasm/a/fdplusv3-191208.inf.txt">info</a>)
a disk image containing all the formatting information needed
to disassemble a Macintosh Plus ROM image
(version 3, final - checksum 4D1F8172).
</p>
<p>
<a href="roms.html">ROM Formatting Information</a> -
more images to disassemble other Macintosh ROMs.
</p>
</blockquote>
<p>
FDisasm is a formatting disassembler for Motorola 680x0 code.
It makes it possible to distribute the means to create an
annotated disassembly of copyrighted code (such as Macintosh
ROM images), without distributing that code or files derived from it.
</p>
<p>
To use FDisasm to disassemble the Macintosh Plus ROM, launch
Mini vMac and boot from a disk image containing
a system folder. Mount the fdplusv3-191208 disk image, and import
a copy of the Macintosh Plus ROM onto it. (Such as by using
<a href="../../importfl/index.html">ImportFl</a>.) Mount the
fdisasm200105 disk image, copy the FDisasm application
to the fdplus disk image, and then eject the fdisasm
image. Rename the ROM image
to “bin”, and then launch the FDisasm application. The
program displays a progress indicator, and quits when
it is finished. (It could take five minutes at 1x speed,
so set speed to “all out”. At “all out” speed it
takes under 10 seconds to finish on my Mac Mini.) When the program
finishes, the output is in a file named “listing”.
</p>
<p>
This listing file is over 2 megabytes. The program
MPW Shell 3.2.3 works in Mini vMac and can work with such
large text files. But probably almost nobody else has an
old copy of MPW. (The final version of MPW still available
for free download requires a Mac II or later.) Instead
you can export the listing file to the host computer
(such as by using <a href="../../exportfl/index.html">ExportFl</a>),
and find some program there that can view it. (For
OS X, TextWrangler would work, for example.)
</p>
<p>
<b>Warning</b> : Not enough people are paying
enough attention to FDisasm (especially me) for
it to be relied upon. If you notice something
odd in the output, double check it, and if
it is wrong, please report it to
<a href="https://www.gryphel.com/c/feedback.html">me</a>.
</p>
<p>
This listing file is derived (in terms of copyright
law) from the Macintosh Plus ROM, and so may not be
redistributed.
</p>
<p>
To disassemble the Macintosh 128/512 ROM, follow the above
instructions, except use the fdmac128-0.3.0 disk image, and
of course use a ROM image from a Macintosh 128 or 512.
And similarly for the Macintosh SE, Macintosh
II, and PowerBook 100 ROMs.
</p>
<p>
Here are some details about the formatting information
files used by FDisasm:
</p>
<p>
The only file required by FDisasm is “bin”. But if this is
all it finds, it will just create a hexadecimal dump of
the file. To disassemble code, it needs to know where
the code is. It looks for a file named “bin_map” for
this information
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