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70 lines
3.3 KiB
Markdown
70 lines
3.3 KiB
Markdown
# Contributing To The Effort
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Contributions welcome! Preliminaries:
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* Please review the [README](README.md).
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* Read and adhere to the [Code of Conduct](CODE_OF_CONDUCT.md).
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* Read the [Coding Style](CodingStyle.md) guide.
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## Sub-Projects
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1. Disassembly of the MouseGraphics ToolKit
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* Continue the effort to understand this powerful GUI library.
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* Make it relocatable, work on C bindings for cc65.
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* Pure disassembly changes take place in the `disasm` branch, which builds identically to the original.
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1. Disassembly of DeskTop itself
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* The core bits of DeskTop.
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* The various overlays.
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* The DiskCopy overlay is basically a stand-alone app. Could be fun.
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1. Disassembly of [Selector](https://github.com/inexorabletash/a2d/issues/63)
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1. Bug fixes
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* Try and tackle some of the bugs in the [issue tracker](https://github.com/inexorabletash/a2d/issues?q=is%3Aissue+is%3Aopen+label%3Abug-in-original).
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1. Add new Desk Accessories
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* List of ideas in the [issue tracker](https://github.com/inexorabletash/a2d/issues?utf8=%E2%9C%93&q=is%3Aissue+is%3Aopen+label%3A%22Desk+Accessories%22+label%3A%22feature+request%22)
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## DeskTop Disassembly Burn-Down
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To feel confident about making additions and fixes to DeskTop, we need to
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make sure we're not breaking things. That can be done in some cases by
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relying on API boundaries, such as between MGTK and the DeskTop application.
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But DeskTop itself is a big, monolithic application with multiple overlays,
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so we need to understand nearly all of it before we can start moving code
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around.
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The `res/stats.pl` tool provides is a quick and dirty analysis of the
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progress in turning raw da65 output into something we can confidently
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modify. Here's a snapshot of the output for some files:
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```
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Stats:
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desktop_main.s unscoped: 246 scoped: 1109 raw: 60 unrefed: 29
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desktop_res.s unscoped: 64 scoped: 0 raw: 4 unrefed: 64
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desktop_aux.s unscoped: 83 scoped: 301 raw: 2 unrefed: 32
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loader.s unscoped: 1 scoped: 0 raw: 20 unrefed: 0
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mgtk.s unscoped: 0 scoped: 10 raw: 13 unrefed: 0
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invoker.s unscoped: 0 scoped: 0 raw: 2 unrefed: 0
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```
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* **unscoped** counts the number of auto-generated labels like `L1234`
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produced by da65 which are _not_ in _two_ nested scopes. A scope is
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used for the overall structure of a module, and a nested scope
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is used for procedures. This counts labels which are not in either,
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and thus may have some affinity for a particular address
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and therefore can't be safely moved.
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* **scoped** counts the number of auto-generated labels like `L1234`
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produced by da65 which _are_ inside two nested scopes. Once a label
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is local to a procedure it is generally safe to move, although
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actually understanding the purpose and giving it a more meaningful
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label is even better.
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* **raw** counts the number of 16-bit addresses (`$1234`) in the code;
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these usually refer to routines, resources, or occasionally
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buffer locations that need to be understood and replaced with
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labels.
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* **unrefed** counts the number of auto-generated labels like `L1234`
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that lack references within the source file. Early on, these often
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hint at bogus disassembly but can also signal that the code to
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use a routine or resource has not yet been identified.
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