Com2txt
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== Identification == | == Identification == | ||
| − | Only | + | Only versions 1.11 and 1.41 have been evaluated. |
| − | + | The default format for 1.11-1.41 starts with ASCII "{{magic|T_OOWW3=XXWX}}" (see the HDR_DATA.C source file). The signature "{{magic|com2txt/Nide}}" also appears in the file, but is less reliable for format identification. | |
| − | + | An alternate format is enabled with the <code>-c</code> option (undocumented in English in v1.11). It is named something like "com-batch shared format". For v1.11, such files start with "{{magic|:=%00%AA5$QP}}". For v1.41, they start with "{{magic|:?7%00%CCPY}}", though sometimes the initial "<code>:</code>" is edited to be "<code>;</code>". | |
| − | + | There is apparently also an old format (e.g. from v1.00), whose files start with "{{magic|TXPPP}}". | |
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== Software == | == Software == | ||
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* [{{SACFTPURL|pack|xpa167m.zip}} xpa167m.zip] → *.COM (files have a customized signature) | * [{{SACFTPURL|pack|xpa167m.zip}} xpa167m.zip] → *.COM (files have a customized signature) | ||
* {{DexvertSamples|archive/com2txtPacked}} | * {{DexvertSamples|archive/com2txtPacked}} | ||
| + | * [https://archive.org/details/VectorSoftwarePackforWinGold20000Titles Vector Software Pack for Win Gold] → Disc 2 → DOS/UTIL/BIN/CONV/COM2T141.TGZ → sample/*.com | ||
| + | * {{DiscMasterLink|view/744/Guide_to_Cracking_2002.iso/Programming/IO34.zip/ICEUNP.COM|ICEUNP.COM}} (v~1.41 <code>-c</code> format) | ||
[[Category:Transfer Encodings]] | [[Category:Transfer Encodings]] | ||
Latest revision as of 20:44, 21 January 2026
Com2txt is a utility that converts a DOS COM file to one whose bytes all belong to a certain set of ASCII characters, and which still has the same functionality. It was developed by Naoyuki Nide. Most of the information about it is in Japanese.
It's a silly hack, but it had some practical uses, such as for embedding a COM file in a Batch file, email, etc.
It has a -r option, to recover the original file.
Contents |
[edit] Disambiguation
Not to be confused with:
For other software with a similar name or function, see Executable envelopes#Transfer-encoded executables.
[edit] Identification
Only versions 1.11 and 1.41 have been evaluated.
The default format for 1.11-1.41 starts with ASCII "T_OOWW3=XXWX" (see the HDR_DATA.C source file). The signature "com2txt/Nide" also appears in the file, but is less reliable for format identification.
An alternate format is enabled with the -c option (undocumented in English in v1.11). It is named something like "com-batch shared format". For v1.11, such files start with ":=%00%AA5$QP". For v1.41, they start with ":?7%00%CCPY", though sometimes the initial ":" is edited to be ";".
There is apparently also an old format (e.g. from v1.00), whose files start with "TXPPP".
[edit] Software
- com2txt v1.11 (DOS binary + source code)
- com2txt v1.41: Vector Software Pack for Win Gold → Disc 2 → DOS/UTIL/BIN/CONV/COM2T141.TGZ
[edit] Sample files
- xpa167m.zip → *.COM (files have a customized signature)
- dexvert samples — archive/com2txtPacked
- Vector Software Pack for Win Gold → Disc 2 → DOS/UTIL/BIN/CONV/COM2T141.TGZ → sample/*.com
- ICEUNP.COM (v~1.41
-cformat)
