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<div align="center"><span style="font-size: 22pt">Sierra Unprotection Program</span><br />''Version 2.01''<br />''Author: [[Anders M Olsson]]''<br />''1990-03-30''</div></div>
<div align="center"><span style="font-size: 22pt">Sierra Unprotection Program</span><br />''Version 2.01''<br />''Author: [[Anders M Olsson]]''<br />''1990-03-30''</div></div>
{{TechToolStub}}


{{FanAGISoftwareInfobox
{{FanAGISoftwareInfobox
| Software = Sierra Unprotection Program
| Software = Sierra Unprotection Program
| Image = <!-- [[Image:.png]]<br />
| Image =  
<div align="center">SUP Screenshot</div> -->
| Version = 2.01
| Version = 2.01
| ReleaseDate = {{1990S}}-03-30<ref>From the included README file</ref>
| ReleaseDate = {{1990S}}-03-30<ref>From the included README file</ref>
| Company = {{NAToolCo}}
| Company = {{NAToolCo}}
| DevStatus = {{AbandonedDev}}
| Published = {{Published}}
| Published = {{Published}}
| Developers = {{AndersMOlssonToolDev}}
| Developers = {{AndersMOlssonToolDev}}
Line 14: Line 13:
| ProgLanguage = {{Pascal}}
| ProgLanguage = {{Pascal}}
| OpenSource = {{OpenSW}}
| OpenSource = {{OpenSW}}
| Source = {{SourceSW}}[[#Download|Yes]] (included in Download)
| Source = {{SourceSW}}[[#DL|Yes]] (included in download)
| License = {{NoLicense}}
| License = {{NoLicense}}
| Platform = {{DOSTool}}
| Platform = {{DOSTool}}
Line 34: Line 33:
Anders M Olsson's SUP (Sierra Unprotection Program) removes the [[CPC Disk Protection|CPC copy protection]] from most AGI games, as well as ''[[Thexder]]'' and ''[[3-D Helicopter Simulator]]'' so they can be played on modern PCs. It patches the SIERRA.COM in [[AGI|AGI games]] so that the [[keydisk]] prompt no longer appears, [[CPC.COM]] is no longer loaded and the buffer which would be filled by CPC.COM with the decryption key at run-time will be already filled at program start. Or in short: It just "cracks" SIERRA.COM. It has an "express" option that allows you to unprotect all Sierra AGI games installed on your hard drive in a matter of seconds.
Anders M Olsson's SUP (Sierra Unprotection Program) removes the [[CPC Disk Protection|CPC copy protection]] from most AGI games, as well as ''[[Thexder]]'' and ''[[3-D Helicopter Simulator]]'' so they can be played on modern PCs. It patches the SIERRA.COM in [[AGI|AGI games]] so that the [[keydisk]] prompt no longer appears, [[CPC.COM]] is no longer loaded and the buffer which would be filled by CPC.COM with the decryption key at run-time will be already filled at program start. Or in short: It just "cracks" SIERRA.COM. It has an "express" option that allows you to unprotect all Sierra AGI games installed on your hard drive in a matter of seconds.


Note:
<blockquote>See [[AGI DiskFree Decryptor]] for decrypting AGI games on modern Windows. or use a modern AGI interpreter, like [[AGILE]]</blockquote>
 
Never try to unprotect your original game disk. Sierra games on 5 1/4" diskettes are normally write protected, but 3 1/2 inch diskettes may not be. Make sure that the original is write protected before proceeding. While running this unprotection program, you will be asked to insert your original game disk. This is only required for reading the copy protected track. Nothing will be written to the original diskette, provided you follow the instructions below. When games use more than one diskette, only the first one is copy protected. The other(s) can be copied by DOS, whithout any processing.
 
Version 2.00 of this software has been enhanced to be even simpler than before. An "express" unprotect option has been added, enabling you to unprotect all Sierra software installed on your hard disk in a matter of seconds. Normally, everything is menu-controlled, but a more flexible command-line option for DOS-experts is also provided.
 
<blockquote>See [[AGI DiskFree Decryptor]] for decrypting AGI games on modern Windows.</blockquote>
</blockquote>
</blockquote>


Line 46: Line 39:


<blockquote>
<blockquote>
<!-- Add feature list here -->
Version 2.00 of this software has been enhanced to be even simpler than before. An "express" unprotect option has been added, enabling you to unprotect all Sierra software installed on your hard disk in a matter of seconds. Normally, everything is menu-controlled, but a more flexible command-line option for DOS-experts is also provided.
</blockquote>
</blockquote>


Line 86: Line 79:
<blockquote>
<blockquote>
Download from here:
Download from here:
* [[Image:ZIP.png|ZIP File]] [[File:Sierra_UnProtector_(SUP_201)x.ZIP|Sierra_UnProtector_(SUP_201)x.zip]] <span class="DLInfo"> (ZIP file) [16.1 KB]</span> (includes source)
* [[Image:ZIP.png|ZIP File]] [[File:Sierra_UnProtector_(SUP_201).zip|Sierra_UnProtector_(SUP_201).zip]] <span class="DLInfo"> (ZIP file) [16.1 KB]</span> (includes source)
</blockquote>
</blockquote>


==<br /> Known Issues ==
==<br /> Known Issues ==


*
<blockquote>
Never try to unprotect your original game disk. Sierra games on 5 1/4" diskettes are normally write protected, but 3 1/2 inch diskettes may not be. Make sure that the original is write protected before proceeding. While running this unprotection program, you will be asked to insert your original game disk. This is only required for reading the copy protected track. Nothing will be written to the original diskette, provided you follow the instructions below. When games use more than one diskette, only the first one is copy protected. The other(s) can be copied by DOS, without any processing.
</blockquote>


==<br /> Credits ==
==<br /> Credits ==


[[Anders M Olsson]]
[[Anders M. Olsson]]


==<br /> Legal ==
==<br /> Legal ==
Line 103: Line 98:
against copy protection!
against copy protection!


<blockquote>
  Anders M Olsson
  Anders M Olsson
Jaktstigen 37
Jaktstigen 37
S-222 52 Lund
S-222 52 Lund
SWEDEN
SWEDEN
</blockquote>


When sending money from outsIDE of Sweden, please send cashiers checks, NOT personal checks. Thankyou for using the "SUP" Unprotection Program. Sierra Unprotection Program was released with no license.
When sending money from outside of Sweden, please send cashiers checks, NOT personal checks. Thank you for using the "SUP" Unprotection Program. Sierra Unprotection Program was released with no license.


==<br /> References ==
==<br /> References ==
Line 121: Line 118:
* [[:Category:AGI Interpreter Articles|AGI Interpreter Articles]]
* [[:Category:AGI Interpreter Articles|AGI Interpreter Articles]]
* [[:Category:Cracking Pages|Cracking Pages]]
* [[:Category:Cracking Pages|Cracking Pages]]
* [[Sound Resource (SCI)]]
* [[:Category:AGI CPC Tools|AGI CPC Tools]]
* [[SCI Specifications: Chapter 1 - Introduction#SND|Sound Resources in the SCI Specifications]]
* [[:Category:AGI Copy Protection Tools|AGI Copy Protection Tools]]
* [[:Category:Sound Resources|Sound Resource Articles]]
* [[Patch Resource (SCI)]]
* [[SCI Specifications: Chapter 1 - Introduction#PAT|Patch Resource in the SCI Specifications]]
* [[:Category:Patch Resources|Patch Resource Articles]]
* [[:Category:AGI CP Tools|AGI CP Tools]]
* [[:Category:AGI Cracking Tools|AGI Cracking Tools]]
* [[:Category:AGI Cracking Tools|AGI Cracking Tools]]
* [https://www.abc.se/~m1019/ www.abc.se/~m1019/]
* [https://www.abc.se/~m1019/ www.abc.se/~m1019/]
&nbsp;
&nbsp;
[[Category:Technical Info]]
[[Category:References]]
[[Category:References]]
[[Category:AGI References]]
[[Category:General Tools]]
[[Category:General Tools]]
[[Category:Technical Info]]
[[Category:Technical Info]]
Line 139: Line 131:
[[Category:AGI Interpreter Articles]]
[[Category:AGI Interpreter Articles]]
[[Category:Cracking Pages]]
[[Category:Cracking Pages]]
[[Category:Sound Resources]]
[[Category:AGI Sound Resources]]
[[Category:Patch Resources]]
[[Category:AGI Patch Resources]]
[[Category:Game Utilities]]
[[Category:Game Utilities]]
[[Category:Technical Info]]

Latest revision as of 18:24, 9 October 2025

Sierra Unprotection Program
Version 2.01
Author: Anders M Olsson
1990-03-30
Sierra Unprotection Program
Latest Version:  2.01
Release Date:  1990-03-30[1]
Company: N/A
Development Status:  Abandoned
Publication Status:  Published
Developer(s): Anders M. Olsson
Interface: CLI
Language: Pascal
Open Source: Open
Source Availability:  Yes (included in download)
License: None
Type: CPC Tool, Copy Protection Tool, Cracking Tool, Change to MiscUtil
Relevant Engine: AGI
Platform: DOS
Localization: English
Website: www.abc.se/~m1019/




A.K.A.

  • SUP


Description

Anders M Olsson's SUP (Sierra Unprotection Program) removes the CPC copy protection from most AGI games, as well as Thexder and 3-D Helicopter Simulator so they can be played on modern PCs. It patches the SIERRA.COM in AGI games so that the keydisk prompt no longer appears, CPC.COM is no longer loaded and the buffer which would be filled by CPC.COM with the decryption key at run-time will be already filled at program start. Or in short: It just "cracks" SIERRA.COM. It has an "express" option that allows you to unprotect all Sierra AGI games installed on your hard drive in a matter of seconds.

See AGI DiskFree Decryptor for decrypting AGI games on modern Windows. or use a modern AGI interpreter, like AGILE


Features

Version 2.00 of this software has been enhanced to be even simpler than before. An "express" unprotect option has been added, enabling you to unprotect all Sierra software installed on your hard disk in a matter of seconds. Normally, everything is menu-controlled, but a more flexible command-line option for DOS-experts is also provided.


Requirements


Version History


Development Status

Further development of Sierra Unprotection Program has been abandoned.


Usage

Copy this .exe into the folder of your protected game. Running the decryptor .exe alone will search for "sierra.com" (to find the key offset), and will create a decrypted AGI file called AGI.EXE (the file you will use to run your game). If your loader is named something other than "sierra.com", you just run the decryptor with that loader filename as the argument.

See included README for more information


Options


Download

Download from here:


Known Issues

Never try to unprotect your original game disk. Sierra games on 5 1/4" diskettes are normally write protected, but 3 1/2 inch diskettes may not be. Make sure that the original is write protected before proceeding. While running this unprotection program, you will be asked to insert your original game disk. This is only required for reading the copy protected track. Nothing will be written to the original diskette, provided you follow the instructions below. When games use more than one diskette, only the first one is copy protected. The other(s) can be copied by DOS, without any processing.


Credits

Anders M. Olsson


Legal

If you found this program useful, your contribution of U.S. $ 10:- or Swedish Kronor 50:- would be appreciated. Assist me in my struggle against copy protection!

Anders M Olsson Jaktstigen 37 S-222 52 Lund SWEDEN

When sending money from outside of Sweden, please send cashiers checks, NOT personal checks. Thank you for using the "SUP" Unprotection Program. Sierra Unprotection Program was released with no license.


References

  1. ↑ From the included README file


Also See

 

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