[Coco] CoCo Internals

[Dave Philipsen]

On 1/4/2019 8:59 AM, tim lindner wrote:
> On Fri, Jan 4, 2019 at 12:08 AM Andrew <keeper63 at cox.net> wrote:
>
>> Or what about the Spectrum Analyzer cartridge (how did that work -
>> unless I didn't read the schematic properly and that line doesn't bypass
>> the DAC)...?
> It used audio from the cassette port. Did frequency counting with the
> zero crossing circuit.
>
I've always wondered about that scheme.  Seems the Spectrum Analyzer 
couldn't necessarily be that accurate on anything more than a monophonic 
composition.

Dave