[Coco] Project Sneak Peek

Salvador Garcia salvadorgarciav at yahoo.com
Wed Jul 20 10:33:33 EDT 2016

Ok, now I am excited!
Does this mean that the uController on the SDC CoCo II contains the Arduino bootstrap?

If so, then does this mean that the end user can program the uController from the PC using the Arduino IDE? Will we be able to access any of the uController's pins via a breakout header? (as those similar to Arduino boards)
Thanks! Salvador

      From: Darren A <mechacoco at gmail.com>
 To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com> 
 Sent: Tuesday, July 19, 2016 11:30 PM
 Subject: Re: [Coco] Project Sneak Peek
On Tue, Jul 19, 2016 at 3:31 PM, Nick Marentes wrote:

> On 20/07/2016 6:43 AM, Zippster wrote:
>> With the addition of an analog low-pass filter, yes.
>> Otherwise they are square waves.
>> - Ed
> I assume that the PWM functionality is built into the microcontroller for
> the ability to control things like stepper motors
> Sounds cool but I wonder how many CoCo enthusiasts would actually do this.
> Is there an option in the controller to vary the amplitude of the PWM or
> better still, a DAC to dump data from the RAM to the sound output for
> enhanced game sounds?
> I also assume that any PWM sound will not be mixed with the CoCo's 6-bit
> sound.
> (So many questions.)    :)

Sound generating hardware/software is not my area of expertise.  I just
adapted the arduino code referenced below so it could play samples from
files on an SD card instead of from the MCU flash memory:


The SND input on the CoCo cartridge port is not mixed with output from the
6-bit DAC, but can be mixed with the single-bit sound output.

- Darren

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