[Coco] Coco3 and coco2 peritel on Samsung 730MW

[Luis Antoniosi (CoCoDemus)]

The 74LS02 you install inside the coco3:

https://pbs.twimg.com/media/BQ23f_tCEAAUonA.jpg:large

IC15 has the two signals you need: vsync and hsync. Then I use the pin
10 to drive the Cysnc. But you must disconnect this pin first.
Although the specs says this pins is N/C in fact it's not. You need to
lift the R62 and R61:

http://www.victortrucco.com/Diversos/ConsertoCoco3/DSC02333.JPG

I think this pin is used to the CM-8 monitor as KEY-ID or something.




On Mon, Dec 23, 2013 at 10:22 AM, Steven Hirsch <snhirsch at gmail.com> wrote:
> 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
>
>
> --
>
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco



-- 
Long live the CoCo