AVPACK - Revision history

Jsummers at 15:16, 7 January 2024

2024-01-07T15:16:36Z

Jsummers at 15:54, 6 January 2024

2024-01-06T15:54:20Z

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Compression |subcat2=Executable compression |released=≤1992 }} '''AVPACK''' is an executable compression utility for DOS, develop..."

2022-04-17T16:33:13Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Compression |subcat2=Executable compression |released=≤1992 }} '''AVPACK''' is an executable compression utility for DOS, develop..."

New page

{{FormatInfo
|formattype=electronic
|subcat=Compression
|subcat2=Executable compression
|released=≤1992
}}
'''AVPACK''' is an executable compression utility for DOS, developed by Andrei Volkov.

Some AVPACK-compressed files can be decompressed by AVPACK, using the <code>-X</code> option.

AVPACK can also decompress many files compressed by [[EXEPACK]], [[LZEXE]], or [[PKLITE]].

== Identification ==
A possible signature is ASCII "{{magic|AVPACK}}" at either offset 66 (normal files), or 34 ("encrypted" files).

== Software ==
* [http://old-dos.ru/index.php?page=files&mode=files&do=show&id=140 AVPACK at old-dos.ru]
* {{OldskoolDOSEXE}} → Executable Tools Pack → packers/avpack.*

@@ Line 14: / Line 14: @@
 Compressed COM files start with bytes {{magic|eb 12}}, then ASCII "{{magic|AVPACK}}".
-Compressed EXE files have bytes {{magic|eb 10}}, then ASCII "{{magic|AVPACK}}", at the start of the ''code image'' segment (refer to [[MS-DOS_EXE#Special file positions]])). This is usually at offset 64, or 32 if the "encrypt" option was used.
+Compressed EXE files have bytes {{magic|eb 10}}, then ASCII "{{magic|AVPACK}}", at the start of the ''code image'' segment (refer to [[MS-DOS_EXE#Special file positions]]). This is usually at offset 64, or 32 if the "encrypt" option was used.
 In each case, the "{{magic|AVPACK}}" string is followed by two bytes giving the minor and major version numbers.

@@ Line 5: / Line 5: @@
 |released=≤1992
 }}
-'''AVPACK''' is an executable compression utility for DOS, developed by Andrei Volkov.
+'''AVPACK''' is an executable compression utility for DOS, developed by Andrei Volkov. It compresses [[MS-DOS EXE|EXE]] files (to EXE), and [[DOS executable (.com)|COM]] files (to COM).
 Some AVPACK-compressed files can be decompressed by AVPACK, using the <code>-X</code> option.
@@ Line 12: / Line 12: @@
 == Identification ==
-A possible signature is ASCII "{{magic|AVPACK}}" at either offset 66 (normal files), or 34 ("encrypted" files).
+Compressed COM files start with bytes {{magic|eb 12}}, then ASCII "{{magic|AVPACK}}".
 == Software ==
 * [http://old-dos.ru/index.php?page=files&mode=files&do=show&id=140 AVPACK at old-dos.ru]
 * {{OldskoolDOSEXE}} → Executable Tools Pack → packers/avpack.*