Glad to hear this got you moving ahead.
There are plenty of posts on this forum regarding read-modify-write as well as a straight internet search on the subject if you want to understand the...
Setting the outputs with latx.x instead of portx.x solved the problem.
used a ziplok sandwich bag (its a rf12b/69cw breakout board)
the mask is for a slightly different layout , its only an experiment
No, that sort of info is not in the manual. I don't remember from where I got it but I'd be surprised if it wasn't from one of Darrels post.
Anyway, yes, normally what you do is...
the video is way much better than the instructions I got with the product , I will have another go with some cellophane
Please don't feel bad. I could only hope to quickly analyze someone elses code/project and toss out such a quick and good answer.
The value of forums like this is the willingness of folks...