NetNews Offline 2/NetNews Offline Volume 2.iso/news/comp/sys/cbm/3258

Internet Message Format | 1996-08-05 | 1.7 KB

Path: mail2news.demon.co.uk!gate.demon.co.uk
From: Jason <[e-mail]>
Newsgroups: comp.sys.cbm
Subject: Re: Intro-Stripping
Date: Sat, 2 Mar 96 12:34:50 GMT
Organization: Cosine Systems
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IBRanhdohm ([e-mail]) wrote:

: I wondered that myself. One quick way is to Snapshot them, right where you
: want them to start up each time, and store them to a second disk that way.

You could do it this way, but remember that a snapshotted file will probably
end up *bigger* than the original.  The only real way to remove an intro is
to be able to hack it off.  Try this, it sometimes works...

1) Load the file (note down the end address for later).
2) RUN it and crank up your cartridge when the intro is up.
3) Hunt through for the beginning of the packed file (in many cases it'll
   have a packer startline like 2049 (Zipper) or 2066 (Time V5, 1001 Card
   and TARDIS) and will be on a page boundary (either $2000 or $4000 for
   example) or one byte after (eg $4001) it depends on the coder.
4) Use a monitor to shift from the start point you just found to the end
   of the original file you noted earlier down to $0801.
5) (its calculator time!) take the original end address, subtract the
   start point you found in step three and add $0801 and thats the new
   end of the file.  Save it $0801-$xxxx where xxxx is the new end.

This is *not* guaranteed to work, but has come in very useful to me for
removing "dead" intros (ones that were corrupted in transit) in the past.

Jason  =-)