[Coco] Null modem cable carrier detect

[Neil Cherry]

On 4/15/19 7:52 AM, rietveld rietveld wrote:
> Hi. Is there a way to mimic a carrier detect signal on the coco when using a null modem serial cable instead of a ‎real modem. I am trying to play checkers on two cocos using the cable instead of modems.
> The checkers program seems to be waiting for this signal

Pull the CD line to -12v (though a resistor), if it expects it high.*

Build a debounce switch if it expects the  CD to bounce (high (-12v)
then low (+12v).

PS I think -12v is high.

-- 
Linux Home Automation         Neil Cherry       ncherry at linuxha.com
http://www.linuxha.com/                         Main site
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Author of:    	Linux Smart Homes For Dummies