Cassette Interface Assistance

Ed Sharpe couryhouse at
Tue Feb 28 16:03:35 CST 2017

if anyone has a cable for the trs 80 model 100 small compact cassette drive to  the 100 please lest us know. need this for demoing and display of the model 100 in the museum...
thanks ed# 

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On Tuesday, February 28, 2017 allison via cctalk <cctalk at> wrote:
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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