Cassette Interface Assistance
ajp166 at verizon.net
Tue Feb 28 12:51:26 CST 2017
On 2/28/17 1:43 PM, Jim Brain via cctalk wrote:
> On 2/28/2017 12:17 PM, Ethan Dicks via cctalk wrote:
>> It sounds like he is contemplating a battery-powered tape drive
>> emulator that plugs on the outside of the machine for users to use
>> without opening their boxes. It would then be portable to other
>> machines. Sounds like a great idea.
> This year's CocoFEST is open to all TRS-80 models, not just the Coco,
> and I noticed that many of the models have a similar cassette port
> connector (I think they have variations on the format), and so I
> thought of a neat project that might be of interest to all of the
> participants of the show.
The TRS-80 used two formats! THe base 4K with 4K basic was a slower
format than the 12K basic machine.
The MM100 was a modem (bell 103 compatable).
The pocket computer was again different I forget the format.
COCOs I think were not all the same.
Lots of ground to cover.
> As you note, picking off 5V from inside, while entirely possible, is
> far from optimal, and a uC is the intended recipient. Besides, as
> Tony implies, I should know this stuff, but I have indeed managed to
> move along in my efforts for so many years without needing to use a
> comparator :-)
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