On 2/28/2017 11:56 AM, Chuck Guzis via cctalk wrote:
On 02/28/2017 09:42 AM, Seth Morabito via cctalk wrote:
Synertek used an LM311 (an LM358 would work just fine) to build a
comparator circuit. I _think_ you could use this exact circuit to
take the analog output from the CoCo and turn it into a 5V sqauare
wave.
I don't know a thing about the CoCo cassette format. I know that back
in the day when things like the KC standard were the rage, a NE567 PLL
was considered the cat's whiskers for data recovery. But again, I don't
know what the CoCo cassette standard looks like.
I admit my previous cassette format knowledge is Commodore based, where
they basically shoved a 5V digital signal to the cassette deck, and
expected the deck (which they produced) to handle it. Thus, interfacing
with it is a digital exercise. But, I am not picky on circuitry, so I
will take a look. Any pointers to a schematic?
Also, you may want to look at the IBM 5150 (PC) cassette circuit. My
recollection was that it was pretty robust, even if few made use of the
facility.
I will do so. Right now, a success, even if it's not a final state
option, would be helpful. I had this great idea, but held off on it for
a few weeks because I suspected I'd end up in this state...
--Chuck
--
Jim Brain
br...@jbrain.com
www.jbrain.com
