PC-Shrink - Revision history

Jsummers: /* Software */

2023-12-29T17:47:39Z

‎Software

Dexvertbot: /* Sample files */

2023-12-28T04:16:59Z

‎Sample files

Sembiance: /* Sample files */

2023-10-17T22:46:40Z

‎Sample files

Jsummers: /* Software */

2023-08-04T16:20:09Z

‎Software

Jsummers: /* Sample files */

2023-03-01T16:57:53Z

‎Sample files

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Archiving |extensions={{ext|shr}}, {{ext|001}}, ... }} '''PC-Shrink''' a compression/archiving utility, and a component of PC-Insta..."

2023-02-08T00:50:19Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Archiving |extensions={{ext|shr}}, {{ext|001}}, ... }} '''PC-Shrink''' a compression/archiving utility, and a component of PC-Insta..."

New page

{{FormatInfo
|formattype=electronic
|subcat=Archiving
|extensions={{ext|shr}}, {{ext|001}}, ...
}}
'''PC-Shrink''' a compression/archiving utility, and a component of PC-Install. PC-Install is installation software for DOS and Windows, developed by 20/20 Software.

Its file format is '''.SHR'''. The format might also be embedded in some self-extracting installer files -- more research is needed.

It uses [[PKWARE DCL Implode]] compression.

There are two known versions of SHR format. We'll call them "old" and "new", on the assumption that the one with generally larger segments and fields is newer.

== File structure ==
''The information here is based on educated guesswork. It was written for the fileformats.archiveteam.org wiki.''

An SHR file starts with a fixed-size archive header. Normally, this is followed by a sequence of member files, each with a fixed-size file header. Multi-part archives are different, though -- best guess is that the data after the archive headers needs to be collected and concatenated.

=== Old format file structure ===
The archive header size is 56 bytes. Each file header is 48 bytes.

Archive header:
{| class="wikitable"
! Offset !! Length !! Description
|-
|0 || 13 || Usually all 0x00 bytes.
|-
|13 || 1 || Always 0x74.
|-
|14 || 2 || Number of member files.
|-
|16 || 1 || Always or usually 0x74.
|-
|17 || 39 || Usually all 0x00 bytes.
|}

=== New format file structure ===
The archive header size is 58 bytes. Each file header is 168 bytes.

Archive header:
{| class="wikitable"
! Offset !! Length !! Description
|-
|0 || 14 || All 0x00 bytes for a single part archive. A filename appears here if the file is part of a multi-part archive.
|-
|14 || 2 || Always 0x74 0x00.
|-
|16 || 2 || Number of member files.
|-
|18 || 2 || 0x74 0x00 for a single-part archive, or the initial file of a multi-part archive. 0x75 0x00 for non-initial files.
|-
|20 || 38 || Usually all 0x00 bytes. But, for example, the first byte is <code>0x05</code> in some self-extracting installers.
|}

== Software ==
* PC-Shrink (These items have not all been confirmed to use SHR format.)
** [https://vetusware.com/download/PC-Install/?id=17016 PC-Install 4.0 (at Vetusware)] (for DOS). Includes SHRINK.EXE (create SHR files), PEEK.EXE (list contents), SPLIT.EXE (make multi-part archive).
** [https://vetusware.com/download/pc-install/?id=8413 PC-Install 4.00 Pro (at Vetusware)]
** [https://vetusware.com/download/PC-Install%20Super%20Combo/?id=17035 PC-Install Super Combo 5.0 (at Vetusware)]
** [https://vetusware.com/download/PC%20Install/?id=16339 PC Install (at Vetusware)] (v6 for Windows?)
** [https://vetusware.com/download/PC-Install%20with%20Internet%20Extensions/?id=17009 PC-Install with Internet Extensions 6.03 (at Vetusware)]
** [https://vetusware.com/download/PC-Install%20with%20Internet%20Extensions%20v7.0/?id=17008 PC-Install with Internet Extensions 7.0 (at Vetusware)]
* [https://archive.org/details/pelitcd2 Pelit CD-ROM #2] → PCDB.ISO → OHJELMAT/ATRILOGY.ZIP → SHRINK.EXE - A copy of the compression utility from PC-Install 4.0
* {{CdTextfiles|/cream/cream04/utility/dosdemo.zip|dosdemo.zip}} - PC-Install demo for DOS. Does not demonstrate SHR format. Unknown if it can be made to decompress SRH files.

== Sample files ==
Old format:
* {{CdTextfiles|nightowl/nopv20/001A/DCARDS10.ZIP|DCARDS10.ZIP}}
* {{CdTextfiles|nightowl/nopv17/035A/PEMLITE1.ZIP|PEMLITE1.ZIP}}
* {{CdTextfiles|cream08/cream08-02/database/pb313d.zip|pb313d.zip}}

New format:
* {{CdTextfiles|http://cd.textfiles.com/cream20/comm/qm4.zip|qm4.zip}}
* {{DiscMasterLink|browse/11878/2016.01.27.ftp.3drealms.com.tar.xz/2016.01.27.ftp.3drealms.com.tar/ftp.3drealms.com/share/1wolf14.zip|1wolf14.zip}}
* {{DiscMasterLink|browse/4524/QRZ%20Ham%20Radio%20Callsign%20Database%20-%20Volume%2012.iso/files/antennas/voawin.zip|voawin.zip}}

== Links ==
* [https://books.google.com/books?id=COEmRfcp2RAC&lpg=PP1&pg=PA363#v=onepage&q&f=false PC-Install ad in PC Magazine, Nov 21, 1995, p. 363]

@@ Line 75: / Line 75: @@
 * [https://archive.org/details/tekno-games-2-1999-cd1-2 TEKNO GAMES 2-1999] → TEKNO GAMES 2-1999 CD2.iso → GAMES/DOS/1WOLF14.ZIP → W3DSW14.SHR
 * [https://archive.org/details/qrz-ham-radio-callsign-database-volume-11 QRZ Ham Radio Callsign Database Volume 11] → FILES/ANTENNAS/VOAWIN.ZIP ...
-* https://telparia.com/fileFormatSamples/archive/pcShrink/
+* {{DexvertSamples|archive/pcShrink}}
 == Links ==
 * [https://books.google.com/books?id=COEmRfcp2RAC&lpg=PP1&pg=PA363#v=onepage&q&f=false PC-Install ad in PC Magazine, Nov 21, 1995, p. 363]

@@ Line 75: / Line 75: @@
 * [https://archive.org/details/tekno-games-2-1999-cd1-2 TEKNO GAMES 2-1999] → TEKNO GAMES 2-1999 CD2.iso → GAMES/DOS/1WOLF14.ZIP → W3DSW14.SHR
 * [https://archive.org/details/qrz-ham-radio-callsign-database-volume-11 QRZ Ham Radio Callsign Database Volume 11] → FILES/ANTENNAS/VOAWIN.ZIP ...
 == Links ==
 * [https://books.google.com/books?id=COEmRfcp2RAC&lpg=PP1&pg=PA363#v=onepage&q&f=false PC-Install ad in PC Magazine, Nov 21, 1995, p. 363]

@@ Line 62: / Line 62: @@
 ** [https://vetusware.com/download/PC-Install%20with%20Internet%20Extensions%20v7.0/?id=17008 PC-Install with Internet Extensions 7.0 (at Vetusware)]
 * [https://archive.org/details/pelitcd2 Pelit CD-ROM #2] → PCDB.ISO → OHJELMAT/ATRILOGY.ZIP → SHRINK.EXE - A copy of the compression utility from PC-Install 4.0
-* {{CdTextfiles|/cream/cream04/utility/dosdemo.zip|dosdemo.zip}} - PC-Install demo for DOS. Does not demonstrate SHR format. Unknown if it can be made to decompress SRH files.
+* {{CdTextfiles|/cream/cream04/utility/dosdemo.zip|dosdemo.zip}} - PC-Install demo for DOS. Does not demonstrate SHR format. Unknown if it can be made to decompress SHR files.
 * {{Deark}}

@@ Line 71: / Line 71: @@
 New format:
-* {{CdTextfiles|http://cd.textfiles.com/cream20/comm/qm4.zip|qm4.zip}}
+* {{CdTextfiles|cream20/comm/qm4.zip|qm4.zip}}
-* {{DiscMasterLink|browse/11878/2016.01.27.ftp.3drealms.com.tar.xz/2016.01.27.ftp.3drealms.com.tar/ftp.3drealms.com/share/1wolf14.zip|1wolf14.zip}}
+* [https://archive.org/details/tekno-games-2-1999-cd1-2 TEKNO GAMES 2-1999] → TEKNO GAMES 2-1999 CD2.iso → GAMES/DOS/1WOLF14.ZIP → W3DSW14.SHR
-* {{DiscMasterLink|browse/4524/QRZ%20Ham%20Radio%20Callsign%20Database%20-%20Volume%2012.iso/files/antennas/voawin.zip|voawin.zip}}
+* [https://archive.org/details/qrz-ham-radio-callsign-database-volume-11 QRZ Ham Radio Callsign Database Volume 11] → FILES/ANTENNAS/VOAWIN.ZIP ...
 == Links ==
 * [https://books.google.com/books?id=COEmRfcp2RAC&lpg=PP1&pg=PA363#v=onepage&q&f=false PC-Install ad in PC Magazine, Nov 21, 1995, p. 363]