Log inRegister an accountBrowse CSDbHelp & documentationFacts & StatisticsThe forumsAvailable RSS-feeds on CSDbSupport CSDb Commodore 64 Scene Database
You are not logged in 
CSDb User Forums


Forums > Requests > Onefile-demo with protection?!
2017-01-24 18:30
bugjam

Registered: Apr 2003
Posts: 1272
Onefile-demo with protection?!

Hi all,

here is a tricky one. A friend of mine tried to analyze a one-file-demo back in the late 80s, because he was impressed with the effects; it could have been a crack intro as well.
Unfortunately the only thing he remembers is that the program formatted the disk, after he had changed something in the code (he tried to run it block-wise, to see what each part was doing), so apparently it had some sort of very nifty protection against nosy rippers. :-)
Anyone ever encountered something like this?
 
... 3 posts hidden. Click here to view all posts....
 
2017-01-24 19:21
Zyron

Registered: Jan 2002
Posts: 2035
Smurf :D
2017-01-24 20:34
Count Zero

Registered: Jan 2003
Posts: 771
I remember I had a version of Charset Mixer V1.0 on one of my disks and someday it killed that tool disk. Apparently since I loaded the program with a different speeder than usual. (FC3 vs AR5 or smthg)
Never really cared to investigate. Maybe someone else cares to check :)
2017-01-25 07:54
bugjam

Registered: Apr 2003
Posts: 1272
Ah, so this was actually quite common - thanks a lot for the info, I had never heard of that protection mechanism before. Cheers!
2017-01-25 08:06
j0x

Registered: Mar 2004
Posts: 207
I got a demo disk from Noise in the late eighties. Ran the first demo, pressed run/stop-restore in the last part, which caused the demo to do a format. I never got to see the rest of the demos on that disk...
2017-01-25 14:01
Danzig

Registered: Jun 2002
Posts: 368
AFAIR this Fresh Intro had a "format-disk-protection", if one might call it so.
2017-01-25 18:29
ZeSmasher

Registered: Feb 2003
Posts: 222
we in Fresh protected our prgs so CFA could not recrack them, haha! :)
2017-01-25 21:36
TheRyk

Registered: Mar 2009
Posts: 407
Just write "THOU SHALT NOT STEAL" in memory at $0810 :D
2017-01-27 13:44
Danzig

Registered: Jun 2002
Posts: 368
Quote: we in Fresh protected our prgs so CFA could not recrack them, haha! :)

Fresh on Top
2017-01-30 03:55
Graham
Account closed

Registered: Dec 2002
Posts: 990
Quote: I remember I had a version of Charset Mixer V1.0 on one of my disks and someday it killed that tool disk. Apparently since I loaded the program with a different speeder than usual. (FC3 vs AR5 or smthg)
Never really cared to investigate. Maybe someone else cares to check :)


Yeah, I had the same experience with the same tooldisk. It was Magic Disk 64, Sonderausgabe 3:

Magic Disk 64, Sonderausgabe 3 Cover

It wasn't the FC3 fastloader which "killed" the disk though. But if you had a load error, it would quick-format the disk because of the wrong end-addy in the zeropage.
2017-01-31 23:32
Count Zero

Registered: Jan 2003
Posts: 771
Thx for clearing that up, Graham!
Previous - 1 | 2 - Next
RefreshSubscribe to this thread:

You need to be logged in to post in the forum.

Search the forum:
Search   for   in  
All times are CET.
Search CSDb
Advanced
Users Online
hedning/G★P
Knut Clausen/SHAPE
Luca/FIRE
Mch/Genesis Project
Digger/Elysium 🇵🇱..
Flavioweb/🇮🇹ASR/HF🇮🇹..
Hoild/Ultimate Newco..
Dymo
crayon/Hokuto Force
Guests online: 62
Top Demos
1 Uncensored  (9.7)
2 Edge of Disgrace  (9.7)
3 Coma Light 13  (9.6)
4 The Shores of Reflec..  (9.6)
5 Lunatico  (9.6)
6 Quad Core 100%  (9.5)
7 Comaland 100%  (9.5)
8 Incoherent Nightmare  (9.5)
9 Wonderland XII  (9.5)
10 Comaland  (9.5)
Top onefile Demos
1 Pandemoniac Part 2 o..  (9.6)
2 Synthesis  (9.6)
3 Dawnfall V1.1  (9.5)
4 Daah, Those Acid Pil..  (9.5)
5 Field Sort  (9.4)
6 Treu Love [reu]  (9.4)
7 Dawnfall  (9.3)
8 Globe 2016 [reu]  (9.3)
9 KAOS 64  (9.3)
10 Hardware Accelerated..  (9.2)
Top Groups
1 Booze Design  (9.4)
2 Censor Design  (9.4)
3 Oxyron  (9.4)
4 Crest  (9.3)
5 Finnish Gold  (9.3)
Top Coders
1 Axis  (9.8)
2 Crossbow  (9.8)
3 Graham  (9.8)
4 HCL  (9.8)
5 Lft  (9.7)

Home - Disclaimer
Copyright © No Name 2001-2017
Page generated in: 0.522 sec.