Zoo Z format - Revision history

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2021-01-30T14:24:20Z

‎Software

Jsummers at 17:07, 8 January 2021

2021-01-08T17:07:31Z

Jsummers at 17:06, 8 January 2021

2021-01-08T17:06:27Z

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Compression |extensions={{ext|?z?}}, {{ext|zzz}} |released=≤1988 }} Zoo '''Z format''' is an obscure compressed file format assoc..."

2021-01-05T21:22:53Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Compression |extensions={{ext|?z?}}, {{ext|zzz}} |released=≤1988 }} Zoo '''Z format''' is an obscure compressed file format assoc..."

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{{FormatInfo
|formattype=electronic
|subcat=Compression
|extensions={{ext|?z?}}, {{ext|zzz}}
|released=≤1988
}}
Zoo '''Z format''' is an obscure compressed file format associated with the [[Zoo]] archive format. Though "Z format" seems to be its name, the Zoo source code often uses the word "Tiny" to refer to it.

The file naming convention is to replace the middle character of the extension with a "Z", much like [[Crunch]] format does.

It is virtually undocumented, and does not seem to have been intended as a general-purpose compressed file format. One use for it is to efficiently copy a compressed member file from one Zoo archive to another, without decompressing and recompressing it.

Z format is supported by Zoo 2.00 through 2.10 for DOS. (It might work in some earlier versions, or on other platforms, but that hasn't been verified.)

== Identification ==
Files begin with signature bytes {{magic|fe 07}}.

== Examples ==
These examples use DOS/[[DOSBox]].

=== To create a Z format file ===
Given a file (example.txt) to compress, add it to a new temporary Zoo archive in the normal way:

> ZOO.EXE -add temp1.zoo example.txt
Zoo: example.txt -- added

This creates temp1.zoo. The use the "z" option to extract it in "Z format":

> ZOO.EXE xz temp1.zoo example.txt
Zoo: example.txt ==> example.tzt -- extracted

This creates example.tzt.

=== To decompress a Z format file ===

Given a file (example.tzt) in Z format, add it to a new temporary Zoo archive, and use the "z" option.

> ZOO.EXE az temp2.zoo example.tzt
Zoo: example.txt <== example.tzt -- added

Then extract it in the normal way:

> ZOO.EXE -extract temp2.zoo
Zoo: example.txt -- extracted

== Software ==
* {{CdTextfiles|simtel/simtel20/MSDOS/ARCHIVRS/ZOO210.EXE|Zoo 2.10 for DOS}}

← Older revision		Revision as of 14:24, 30 January 2021
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	== Software ==		== Software ==
	* {{CdTextfiles\|simtel/simtel20/MSDOS/ARCHIVRS/ZOO210.EXE\|Zoo 2.10 for DOS}}		* {{CdTextfiles\|simtel/simtel20/MSDOS/ARCHIVRS/ZOO210.EXE\|Zoo 2.10 for DOS}}
		+
		+	See also [[Zoo#Software]].

← Older revision		Revision as of 17:07, 8 January 2021
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	Z format is supported by Zoo 2.00 through 2.10 for DOS. (It might work in some earlier versions, or on other platforms, but that hasn't been verified.)		Z format is supported by Zoo 2.00 through 2.10 for DOS. (It might work in some earlier versions, or on other platforms, but that hasn't been verified.)
		+
		+	Z format is distinct from [[Zoo filter format]].

	== Identification ==		== Identification ==

@@ Line 9: / Line 9: @@
 The file naming convention is to replace the middle character of the extension with a "Z", much like [[Crunch]] format does.
-It is virtually undocumented, and does not seem to have been intended as a general-purpose compressed file format. One use for it is to efficiently copy a compressed member file from one Zoo archive to another, without decompressing and recompressing it.
+One use for Z format is to efficiently copy a compressed member file from one Zoo archive to another, without decompressing and recompressing it.
 Z format is supported by Zoo 2.00 through 2.10 for DOS. (It might work in some earlier versions, or on other platforms, but that hasn't been verified.)
 == Identification ==
-Files begin with signature bytes {{magic|fe 07}}.
+The files produced by Zoo for DOS start with bytes {{magic|fe 07 01}}.
 == Examples ==