[Coco] Cassette Program Loading Help Needed

Darren A mechacoco at gmail.com
Sun Mar 19 01:40:46 EDT 2017

On Sat, Mar 18, 2017 at 9:56 PM, RETRO Innovations wrote:

> On 3/18/2017 10:36 PM, Dave Philipsen wrote:
>> You could go about it in a completely different manner and not generate
>> the audio using PWM.  Just generate a straight square wave and feed that to
>> the CoCo.
> As noted above, I thought of that, but early results were not encouraging.
> I thought for sure the resistor DAC would work, and I could get back to
> laying out the board, but I am back to diagnosing again.

Have you looked at how the MC-10 generates its cassette output?  It uses a
single output port pin on the 6803 MCU with a simple attenuator.


- Darren

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