Subj : Re: Musicalc 1983
To   : Terry Raymond
From : J.B. Wood
Date : Tue Feb 19 2019 06:42 am

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: [email protected]

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