Posted By
MMS
on 2017-07-09
16:54:31
 |  Re: Tap Dancer
One comment on this from http://www.versluis.com/2014/07/fixing-up-a-commodore-plus4/
"With the right adaptor, either datasette can be used on either computer – even though the recorded format is not compatible. For example, a programme saved by a C64 on the same datasette cannot be read by a Plus/4 (they use different frequencies to write data).
From C2N232 documentation (they KNOW the stuff)
"The digital oscilloscope was needed again in October or November for debugging the custom transfer routines on the Commodore 264 series, whose cassette read input is level-sensitive and not high-to-low sensitive like in all other Commodores. At that time, nothing remarkable was reported in the news."
The exact explanation is on Page 25 here:
http://www.commodorefree.com/magazine/vol6/issue59.pdf
In my reading, the new Plus/4 format could store a pulse in shorter time than the predecessor TAP1 format.
BTW, I think the level sensitive input is less sensitive to tape quality than the high-to-low method (a simple dropout may result bad loading with transient detection)).
Despite other guys misaligned heads I do not remember major reading problems with my tapes(good old socialist Polimer brand and few BASF)
Here you may find some goodies may help you:
http://www.zimmers.net/anonftp/pub/cbm/crossplatform/transfer/datassette/index.html
Actually, the C2N232 requires some more detailed knowledge on circuit building than my RS232 project.
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