25 Jan
2008
25 Jan
'08
9:07 p.m.
Date: Fri, 25 Jan 2008 16:40:09 -0600
From: Jim Leonard <trixter at oldskool.org>
Yes. In fact, myself and a few others have done
significant work trying
to get CGA properly emulated (composite CGA emulation is pretty damn close
to the original; some tweaked modes work as well). It can even boot
bootable diskette images (as long as copy protection is absent).
...and that's just the problem here. The program diskette is copy-
protected. What what, I'm not sure.
Cheers,
Chuck
25 Jan
25 Jan
10:11 p.m.
I did get some of the old copy protect diskette stuff to work, Wintek Smartwork, a PCB
layout program. we found that the check relied on trying to write to the floppy, at a
specific track and sector, where they laser burned off the oxide. If the write failed,
they knew it was the original disk.
We unwrapped that disk, found the spot, and made or copy on another disk, and carefully
scraped off the oxide in the same place under a microscope.
It worked!
Randy
From: cclist at sydex.com
To: cctalk at classiccmp.org
Date: Fri, 25 Jan 2008 21:07:40 -0800
Subject: Re: DOSBox...
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Date: Fri, 25 Jan 2008 16:40:09 -0600
From: Jim Leonard <trixter at oldskool.org>
Yes. In fact, myself and a few others have done
significant work trying
to get CGA properly emulated (composite CGA emulation is pretty damn close
to the original; some tweaked modes work as well). It can even boot
bootable diskette images (as long as copy protection is absent).
...and that's just the problem here. The program diskette is copy-
protected. What what, I'm not sure.
Cheers,
Chuck
26 Jan
26 Jan
1:20 a.m.
Randy Dawson wrote:
I did get some of the old copy protect diskette stuff
to work, Wintek Smartwork, a PCB layout program. we found that the check relied on trying
to write to the floppy, at a specific track and sector, where they laser burned off the
oxide. If the write failed, they knew it was the original disk.
That is a very very rare protection -- I'd consider that software
collectible just for the protection method involved!
There was an "enhanced" Central Point option board with a bushbutton on
the back of the bracket; the idea was that, for laser hole "copies", it
would scan the source disk and find the hole somehow. Then it would
store the location on the board somewhere, and when you had the
pushbutton in, that sector would always fail reads or writes.
I like your solution though (scraping under a microscope ;-)
--
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
Help our electronic games project: http://www.mobygames.com/
Or check out some trippy MindCandy at http://www.mindcandydvd.com/
A child borne of the home computer wars: http://trixter.wordpress.com/
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