| |
cba
Registered: Apr 2002
Posts: 933 |
History of Crunchers & Packers
I am very curious what crackers from back in the day used for crunching or packing their releases.
Self made ones I can only assume. Are any of them available here at csdb ?
I am talking about the very first ones like :
1103
ABC Crackings
Mr.Z
The period before 1986 , so before the Card Cruncher from the 1001 crew
Anyone here who knows more about this ? |
|
... 29 posts hidden. Click here to view all posts....
|
| |
cba
Registered: Apr 2002
Posts: 933 |
Check : http://www.ffd2.com/fridge/chacking/c=hacking16.txt
"Milestones of C64 Data Compression"
|
| |
Mace
Registered: May 2002
Posts: 1799 |
I once had a go at some Huffmann algo myself, but failed miserably when trying to think of a way to store the 'tree' in the memory of the C64 :) |
| |
yago
Registered: May 2002
Posts: 332 |
morse-code can be considered one of the first packers
|
| |
SIDWAVE
Account closed
Registered: Apr 2002
Posts: 2238 |
Morse code doesnt pack, it extends.
S (1 char) -> ... (3 chars) |
| |
Graham
Account closed
Registered: Dec 2002
Posts: 990 |
No it converts a 26 character alphabet into a 3 character alphabet with character length depending on how often the letter is used.
|
| |
tlr
Registered: Sep 2003
Posts: 1724 |
That's quite similar to Huffman with a static tree when you think about it. :) |
| |
Catweazle
Account closed
Registered: Aug 2021
Posts: 8 |
I analyzed and heavily improved the matcham time-cruncher V4 or V5 for my own demos and released it as the "News-Packer" under the fun pseudo name "Sado-Maso-Marketing" at this time Catweazle/Alcoholics.
The News-Packer could show the disc contents by pressing the $ sign to find the names, had an incredible amount of different decruncing effects and some new and improved crunch modes with much better efficiency or much better speed and you could compress files with nearly full ram usage - also the shadowed RAM.
This cruncher was far beyond of its time using a very special way of run-length encoding with some extraordinary ideas and technology never heard and seen before and this motivated myself to learn everything about compression and into creating my own crunchers with special speed-up tables later on Amiga and PC. I also developed different hyperspeed technologies (some were much quicker and more efficient than quick hashing with much better memory usage!) for compression. From time to time I also nowadays read of new technologies and try them out for comparison reasons just for fun. Cruncher Tech and encryption/decryption is still a very interesting hobby for me.
I´m rather sure the next step afterwards impressing me was the cruel cruncher. But I did never dive into its code working on my own algorithms. Perhaps someone knows more about how it worked in detail? |
| |
chatGPZ
Registered: Dec 2001
Posts: 11146 |
News Packer V1.0? Are you sure this isnt a textimprovement of Timercruncher v4? :) |
| |
Zyron
Registered: Jan 2002
Posts: 2381 |
*brings the popcorn* |
| |
iAN CooG
Registered: May 2002
Posts: 3136 |
actually an hack of Matcham Time Cruncher V3.1
the decruncher code is altered to use different zp locations ($61-64 instead of $a6-a9) and of course it has an improved user interface, but that's it. |
| Previous - 1 | 2 | 3 | 4 - Next |
