If you perfect the process, post your methods. It will be better than translating Chinglish.
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...