[Coco] Coco3 and coco2 peritel on Samsung 730MW

[Steven Hirsch]

On Mon, 23 Dec 2013, Luis Antoniosi (CoCoDemus) wrote:

> On Mon, Dec 23, 2013 at 9:44 AM, Steven Hirsch <snhirsch at gmail.com> wrote:
>> Highway Model 100
>
> When building the scart cable you must  connect pin 8 (SWITCH - 12V)
> to pin to pin 16 (BLNK) using a 560 Ohm resistor. Like this one:
>
> http://members.optusnet.com.au/eviltim/gamescart/dcast.png
>
> But you need to ground pin 17 only (VGND).

Hmm.  I had to condition _two_ signals in order to get things cooperating:

Pin 8 --> +12v for "AV" mode (external input)

Pin 16 --> 1-3v for RGB signaling

In particular, pin 16 selects composite video when it sees 0-0.4v

Steve


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