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46 lines
4.1 KiB
Markdown
46 lines
4.1 KiB
Markdown
# Notes on code "proofers"
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> Please correct or add to this information!
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Some summary notes and observations on the Apple II code checking tools.
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## Applesoft
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| | Includes REM contents | Includes spaces | Control Chars? | Other? | Case-sensitive? | Operation | Grouping(s) | Checksum Size | Program Total |
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|--------------------------------|:----------------------|:----------------|:---------------|--------|:----------------|:-------------|:--------------------------------|:------------------------------------|:-------------------------------------|
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| Compute! Automatic Proofreader | Yes | No | CTRL+D | N/A | Yes | Input Buffer | Line | 1 byte | No |
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| Nibble Checkit | No | In strings | In Strings | "?" | Yes | Input Buffer | Line, Program | 1 byte (line)<br/>2 bytes (program) | Yes, on line numbers |
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| Nibble Apple Checker | Yes | No | CTRL+D | N/A | Yes | Program | Program | 1 byte (2 bytes length) | Yes, checksum and length calculation |
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| MicroSPARC Key Perfect 2 | Yes | Yes | All | N/A | Yes | Program | Groups of 10 lines,<br/>Program | Max 3 bytes | Yes, byte count |
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| MicroSPARC Key Perfect 4 | Yes | No | CTRL+D | N/A | Yes | Program | Groups of 10 lines,<br/>Program | Max 3 bytes | Yes, byte count |
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| MicroSPARC Key Perfect 5 | No | No | CTRL+D | N/A | No | Program | Groups of 10 lines,<br/>Program | 4 bytes | Yes |
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* *Includes REM contents* - most checksum algorithms includes the REM as well as the contents of the REM statement; some only include the REM itself.
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* *Includes spaces* - indicates if whitespace is important.
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* *Control Chars?* - indicates if any control characters are included in the checksum.
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* *Other?* - Checkit replaces "?" with "PRINT" to standardize the shortcut for the `PRINT` statement. The catch is that it ignores quotes. So _any_ "?" is replaced with "PRINT" for the checksum algorithm.
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* *Case-sensitive?* - is "A" and "a" handled differently?
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* *Operation* - if "Input Buffer" is specified, the checksums are displayed after a line of code has been entered; otherwise, the program must be completed and saved before running checksum.
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* *Groupings* - what, if any, groupings apply.
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## Binary
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| | Includes spaces | Other? |
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|--------------------------------|-----------------|--------|
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| Compute! Automatic Proofreader | | |
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| Nibble Checkit | Yes | Yes |
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| Nibble Apple Checker | No | N/A |
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| MicroSPARC Key Perfect 2 | No | N/A |
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| MicroSPARC Key Perfect 4 | | |
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| MicroSPARC Key Perfect 5 | | |
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* *Includes spaces* - indicates if spaces are important. For instance, Nibble Checkit uses the input buffer and does not ignore spaces. Thus, if extra spaces are includes like "0300:A9<spc><spc>00", the checksum will be off.
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* *Other?* - Checkit does the program total against the program bytes, not the entered text. Only the line checksum uses the input buffer.
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## References
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* See the [reference](.) directory for source code and original articles.
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* [Computer Magzine Proofreaders](https://github.com/22samurai/computer-magazine-proofreaders).
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* [a2_proofreader](https://github.com/hartze11/a2_proofreader)
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* As always searching through [archive.org](https://archive.org) is highly valuable.
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