[GreenKeys] [Bulk] Re: So what else can I do with this?

[Jeffrey D Angus]

On 4/3/2016 6:59 AM, drlegendre . wrote:
> Doing the line polarity reversing control is easy with the C-64. All
> you need do is wire up the line through a DPDT relay (rigged for
> polarity reversal), and power the relay coil directly off the 5V (or
> is that 9V?) cassette port motor control line. IIRC, that line is good
> for 200mA or better.
Actually, the TW-39 card does the polarity reversal.
The call control units respond to the polarity reversal by turning
the machine on. This is the basis of the Telex and TWX "auto start."
> Simple BASIC pokes will toggle the cassette motor line, trigger the
> relay, and flip the polarity as needed. Easy as pie, no additional
> circuitry or power supplies required.
What a "simple" machine (no dial control unit) needs is an auto
start function to start up the machine when it senses an incoming
call.
The i-Telex can be set up to do the "dialing" via keyboard controls.




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Jeff-1.0
wa6fwi
http://www.foxsmercantile.com