2021-06-06 21:07:36 +00:00
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2021-06-08 00:26:39 +00:00
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2021-06-06 21:07:36 +00:00
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<title>6502bench Tools</title>
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<p>6502bench is a code development "workbench" for the 65xx family
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of processors, including the 6502, 65C02, and 65802/65816. It currently
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features one tool, the SourceGen disassembler.</p>
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<p><strong>SourceGen</strong> is an industrial-strength disassembler for 6502,
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65C02, and 65816 programs. It runs on Windows 7 or later.</p>
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2021-06-07 21:51:28 +00:00
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<p>Demos and information:</p>
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<ul>
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<li>Watch a 9-minute
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<a href="https://youtu.be/dalISyBPQq8">product introduction video</a> (from v1.0).</li>
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<li>See an 8-minute
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<a href="https://youtu.be/lSvEr5nCHbY">demonstration of visualizers</a>
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in a disassembly of the Apple II game <i>Space Eggs</i>.</li>
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<li>SourceGen has been used to disassemble software for the Apple II,
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NES (Nintendo Entertainment System), Atari 2600 VCS, and coin-op arcade
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systems. Visit 6502disassembly.com to see examples of
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<a href="https://6502disassembly.com/">completed disassembly projects</a>.</li>
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</ul>
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2021-06-07 21:51:28 +00:00
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<p>Check out the
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<a href="https://github.com/fadden/6502bench/">GitHub project</a>,
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where you can download source & binaries for the latest version from the
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<a href="https://github.com/fadden/6502bench/releases/">Releases page</a>.
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</p>
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2021-06-06 21:07:36 +00:00
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<p>Key features include:</p>
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<ul>
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<li>Fully interactive point-and-click GUI. Define labels, set addresses,
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add comments, and see the results immediately. Add multi-line comments
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and have them word-wrapped automatically. Create inline visualizations of
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embedded bitmaps and wireframe data, and define animated sequences.</li>
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<li>Sophisticated static analysis. The disassembly engine traces code
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execution, automatically finding all instructions reachable from a given
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starting point. Changes to the processor status flags are tracked,
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allowing identification of branches that are always/never taken,
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accurate cycle count listings, and easier analysis of 65816 code with
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variable-width registers.</li>
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<li>Easy generation of assembly source code in popular formats (currently
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64tass, ACME, cc65, and Merlin 32). Cross-assemblers can be invoked from the GUI to
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verify correctness.</li>
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<li>Symbols and constants are provided for ROM and operating system entry
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points on several popular systems (Apple, Atari, Commodore, others).</li>
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<li>Project files are designed for sharing and collaboration.</li>
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</ul>
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<p>
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2021-06-08 00:26:39 +00:00
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<a href="images/screenshot-15-mainwin.png"><img src="images/screenshot-15-mainwin-small.png" alt="Main Window Screenshot" width="320" height="180"/></a>
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<a href="images/screenshot-15-asmwin.png"><img src="images/screenshot-15-asmwin-small.png" alt="Gen/Asm Dialog Screenshot" width="320" height="180"/></a>
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<a href="images/screenshot-15-vis.png"><img src="images/screenshot-15-vis-small.png" alt="Gen/Asm Dialog Screenshot" width="320" height="180"/></a>
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</p>
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<h4>Features in Detail:</h4>
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<ul>
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<li>Analyzer:
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<ul>
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<li>Support for 6502, 65C02, and 65816, including undocumented
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opcodes and the W65C02 extensions.</li>
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<li>Code tagging mechanism allows manual identification of code start/stop
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points and inline data.</li>
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<li>Editable labels are generated for every branch destination and data
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target.</li>
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<li>Automatic detection and classification of character strings and runs
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of identical bytes.</li>
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<li>Symbol files for ROM entry points, operating system constants, and
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other platform-specific data are stored in plain text files loaded at runtime.</li>
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<li>Extension scripts can be defined that automatically reformat code and
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identify inline data that follows a JSR, JSL, or BRK.</li>
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</ul></li>
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<li>User interface:
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<ul>
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<li>"Infinite" undo/redo of all operations.</li>
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<li>Cross-reference tables are generated for every branch and data target
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address, as well as for external platform symbols.</li>
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<li>Instruction operand formats (hex, decimal, binary, character, symbol) can
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be set for individual instructions. References to nearby symbols are
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offset, allowing simple expressions like "addr + 1".</li>
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<li>Data areas can be formatted in various formats, including individual
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bytes, 16-bit and 24-bit words, addresses, or strings.
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Multiple character encodings are supported, including ASCII, high ASCII,
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C64 PETSCII, and C64 screen codes.</li>
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<li>Zero-page variables can be given different labels at different points
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in the program.</li>
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<li>Multi-line comments can be "boxed" for an authentic retro feel.</li>
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<li>Notes can be added that aren't included in generated output. These
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also function as color-coded bookmarks. Very useful for marking up a
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work in progress. Similarly, symbols can be marked as uncertain by
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adding a '?' that is automatically stripped away during code generation.</li>
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<li>Instruction reference data, such as CPU cycles and flags modified, are
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shown along with a description of the opcode's function. Very useful when
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encountering rarely-used undocumented instructions.</li>
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<li>Various aspects of the code display can be reconfigured, including
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upper/lower case, pseudo-opcode naming, and expression formats. These
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choices are not part of the project definition, so everyone can view a
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project according to their own personal preferences.</li>
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</ul></li>
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<li>Code generation:
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<ul>
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<li>Labels can be global or local. Use non-unique labels like "@Loop"
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for clarity. Labels will be promoted from local to global or renamed to
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be unique as required by each assembler.</li>
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<li>Symbols may be exported from one project and imported into another
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to facilitate multi-binary disassembly.</li>
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<li>Listings can be generated in HTML form for publication on the web. Many
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aspects of the output format can be configured. Inline visualizations
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are exported as GIF or animated GIF.</li>
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</ul></li>
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<li>Miscellaneous:
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<ul>
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<li>All project data is stored in text formats (primarily JSON).</li>
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<li>The project file includes nothing from the data file but a CRC. This
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may allow the project to be shared without violating copyrights (subject
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to local laws).</li>
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<li>Handy tools: file slicer, file concatenator, CPU instruction reference
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chart, ASCII chart, file hex dump.</li>
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<li>The OMF converter tool can be used to disassemble Apple IIgs executables.</li>
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</ul></li>
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</ul>
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2021-06-07 21:51:28 +00:00
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<h4>Open Source</h4>
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<p>6502bench is written in C# .NET, using the (free to download) Visual
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Studio Community 2019 IDE as the primary development environment.
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The user interface uses the Windows Presentation Foundation (WPF) API.
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6502bench is an open-source project, licensed under Apache 2.0.
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The full source code is available on
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<a href="https://github.com/fadden/6502bench/">GitHub</a>.</p>
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