question: could somebody (did they at the time) write a program for the apple ][ to create such a diskette? The apple drive can do half track stepping, and IIRC the signal is written strictly by a timing loop in the program
<pre>--Carey</pre> > On 10/02/2024 8:23 PM CDT dwight via cctalk <cctalk@classiccmp.org> wrote: > > > I agree, it isn't a copy type operation. It is a creation type operation. > The cats eye is created by two tones written such that it is one cycle > different per revolution. Each tone it offset by one half of the track width. > Cats eye don't tend to work well with digital sampling scopes unless they > have a large sweep buffer and can keep the high speed sample rates at a slow > sweep speed of a single full revolution. I don't know of any cheap ones that > don't change the sample rate with the sweep rate. > The next one is single tones are placed as burst at varying radial distances. > This has a similar problem for sampling scopes. When used, it looks like > steps that one puts the largest step in the center of the rotation, relative > to the index. > The track centers can be aligned with magnetic material, similar to what is > used for magna-flux work, as far as I know and a micrometer to measure the > offset to the center hole. > It would be far easier to create a new disk than to try and copy one. I can't > imagine how one might copy one. > Dwight >
