There was a very undetcible component-side solder bridge between pins 2 and 3 of RP4. I might not know until tomorrow when I can get a replacement for RP4 (apparently I'm not very good at desoldering, and I didn't see the bridge at all until I (...) (23 years ago, 16-Jan-02, to lugnet.robotics.handyboard)
so there was a bridge between Rx and Tx! that would do it. let us know if things are working now. fred (...) (23 years ago, 16-Jan-02, to lugnet.robotics.handyboard)
Hey! I've put in the memory, and the LCD screen, and I have interactive C running! Pretty cool that I can print messages to the screen. So problem solved! Anyone have some good instructions on how to properly desolder a part? I almost screwed up my (...) (23 years ago, 17-Jan-02, to lugnet.robotics.handyboard)
