[Coco] Homebrew CoCo Games
nickma at optusnet.com.au
Sun Dec 13 14:47:20 EST 2015
On 14/12/2015 3:34 AM, Zippster wrote:
> There is no additional overhead for the CoCo after the AY (or whatever)
> has done it’s part and the signal is put on the SND IN line at the cart port.
> It’s all analog from there. The cart port sound in line is then mixed with
> the DAC output at the DAC in the case of the CoCo 2/3, or at the
> MC14529B (between the DAC and the modulator) in the case of the
> Nothing would really be gained by a separate jack on the cart except
> another output jack, one that would be missing whatever the DAC would
> have contributed to the signal.
> This is my understanding from the schematics, data sheets, etc.
> - Ed
That's right Ed. You can mix the sounds and essentially have 2 sound
And it lowers cost by avoiding extra jacks and holes drilled on the
It's about keeping it simple, elegant and low cost.
More information about the Coco