The Visicalc ROM is only copy protection. It is accessed only by the loader program. I have a version where I have removed the copy protection. For those who try to remove the copy protection, beware! There is a trap in the loader that erases the disk if it detects tampering. I have located my old Visicalc and Wordpro disks. I haven't yet gone through them. I know I have 8096 versions of both. These programs are old enough that I don't think anyone would object If sent the disk images to zimmers.net. I have no idea who currently owns the copyright to Wordpro. Visicalc was sold to Supercalc, which was sold to Lotus, which was sold to IBM. I don't know what the current status is. On Fri, 2 Mar 2018, Tonguç Endem wrote: > found it :-) > Actually, I found it by accident while I was researching another software, > so that was great. > I'll provide a link soon. > There are some things I'm trying to figure out with the stuff I found. > It appears that back then, some of the most popular software used the > optional ROM for copy protection. > It also appears that a soft-rom / no-rom hack was being used to circumvent > this protection. > I think the hack uses bank switching on 8x96 devices and loads the rom data > from disk to $9000 location and the program works without an actual ROM chip > on the option slot since from the point of the program the rom data appears > where it's supposed to be. > > Anyways, I'll provide more info when I discover more about this stuff. > > > > > -- > Sent from: http://cbm-hackers.2304266.n4.nabble.com/ > > Message was sent through the cbm-hackers mailing list > wlevak@sdf.lonestar.org SDF Public Access UNIX System - http://sdf.lonestar.org Message was sent through the cbm-hackers mailing listReceived on 2018-03-04 02:00:03
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