On 2/17/19 9:33 PM, Terry Raymond wrote:   
   > Hi all,   
   >   
   > I received tons of .D64 images of older C64 midi Software.   
   > Right now Im trying out Musicalc written by Waveform in 1983.   
   >   
   > I tried booting from the image no go it loads about halfway and just stops   
   > and I thought that Musicalc may be copy protected because some copy   
   protection checks and if a copy will probably stop, etc.   
   >   
   >   I checked Fast Hackem and Maverick parameters and they don't even list   
   anything under Musicalc, nothing. (parms).   
   >   
      
   Hello, and I'm probably not going to be of much assistance.  I do have   
   both of those copy programs you mentioned but not the original or a tame   
   copy of Musicalc.  Given the 1983 date if disk copy protection was being   
   used it most likely was via placement of specific errors on one or more   
   of the release disk tracks.  If the .D64 image really is a snapshot of   
   the original disk and you successfully restored it to its original 1541   
   form, then you have to find where those error track reads are, what   
   errors are expected for a successful load, and use Maverick (or even an   
   old one like The Clone Machine) to recreate the errors.  Is Musicalc in   
   BASIC or machine language (ML).  An ML monitor may be useful for   
   tracking down where the 1541 error tracks are being read.  Probably   
   stated the obvious here but best of luck.  Sincerely,   
      
   --   
   J. B. Wood	            e-mail: arl_123234@hotmail.com   
      
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